{"id":2455,"date":"2026-07-22T07:22:15","date_gmt":"2026-07-22T07:22:15","guid":{"rendered":"https:\/\/www.xkh-ceramics.com\/?p=2455"},"modified":"2026-07-22T07:25:38","modified_gmt":"2026-07-22T07:25:38","slug":"structural-ceramics-for-semiconductor-manufacturing-2","status":"publish","type":"post","link":"https:\/\/www.xkh-ceramics.com\/fr\/structural-ceramics-for-semiconductor-manufacturing-2\/","title":{"rendered":"Structural Ceramics for Semiconductor Manufacturing: Component and Material Selection"},"content":{"rendered":"<p class=\"wp-block-paragraph\">Structural ceramics play a critical role in semiconductor manufacturing equipment because many process components must operate under conditions that are difficult for conventional metals and polymers.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Depending on the process, equipment parts may be exposed to:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Plasma and reactive process gases<\/li>\n\n\n\n<li>High or rapidly changing temperatures<\/li>\n\n\n\n<li>Environnements sous vide<\/li>\n\n\n\n<li>Radio-frequency and microwave energy<\/li>\n\n\n\n<li>Aggressive chamber-cleaning chemistry<\/li>\n\n\n\n<li>Repeated wafer-transfer cycles<\/li>\n\n\n\n<li>Tight flatness and positioning requirements<\/li>\n\n\n\n<li>Strict particle and metallic-contamination limits<\/li>\n\n\n\n<li>Electrical insulation or controlled conductivity requirements<\/li>\n<\/ul>\n\n\n\n<figure class=\"wp-block-image aligncenter size-large\"><img fetchpriority=\"high\" decoding=\"async\" width=\"1024\" height=\"768\" src=\"https:\/\/www.xkh-ceramics.com\/wp-content\/uploads\/2026\/07\/Structural-Ceramics-for-Semiconductor-Manufacturing-1024x768.png\" alt=\"\" class=\"wp-image-2456\" srcset=\"https:\/\/www.xkh-ceramics.com\/wp-content\/uploads\/2026\/07\/Structural-Ceramics-for-Semiconductor-Manufacturing-1024x768.png 1024w, https:\/\/www.xkh-ceramics.com\/wp-content\/uploads\/2026\/07\/Structural-Ceramics-for-Semiconductor-Manufacturing-300x225.png 300w, https:\/\/www.xkh-ceramics.com\/wp-content\/uploads\/2026\/07\/Structural-Ceramics-for-Semiconductor-Manufacturing-768x576.png 768w, https:\/\/www.xkh-ceramics.com\/wp-content\/uploads\/2026\/07\/Structural-Ceramics-for-Semiconductor-Manufacturing-16x12.png 16w, https:\/\/www.xkh-ceramics.com\/wp-content\/uploads\/2026\/07\/Structural-Ceramics-for-Semiconductor-Manufacturing-600x450.png 600w, https:\/\/www.xkh-ceramics.com\/wp-content\/uploads\/2026\/07\/Structural-Ceramics-for-Semiconductor-Manufacturing.png 1448w\" sizes=\"(max-width: 1024px) 100vw, 1024px\" \/><\/figure>\n\n\n\n<p class=\"wp-block-paragraph\">Advanced ceramics are used in wafer handling, lithography, etching, deposition, thermal processing, cleaning, inspection, back grinding and other semiconductor processes. Ceramic components commonly include vacuum chucks, electrostatic chuck parts, end effectors, focus rings, chamber liners, nozzles, showerheads, heater components, wafer boats and precision stage structures.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">However, \u201cceramic\u201d is not a single material specification.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Alumina, silicon carbide, aluminum nitride, silicon nitride, zirconia, yttria and cordierite have very different mechanical, thermal, electrical and plasma-resistance characteristics. Material grade, purity, porosity, additives, forming method and surface condition can also affect performance.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">This guide explains how to select structural ceramic components and materials for semiconductor manufacturing equipment.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><\/p>\n\n\n\n<h2 class=\"wp-block-heading\">Qu'est-ce que la c\u00e9ramique de construction ?<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">Structural ceramics are engineered ceramic materials used primarily for their mechanical, thermal, dimensional, chemical or wear-related properties.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Unlike a ceramic electronic package or dielectric substrate whose main purpose may be electrical interconnection, a structural ceramic component generally performs one or more physical equipment functions:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Supporting a wafer<\/li>\n\n\n\n<li>Positioning a process component<\/li>\n\n\n\n<li>Carrying mechanical load<\/li>\n\n\n\n<li>Maintaining flatness<\/li>\n\n\n\n<li>Resisting chamber erosion<\/li>\n\n\n\n<li>Isolating electrical potential<\/li>\n\n\n\n<li>Distributing process gas<\/li>\n\n\n\n<li>Conducting or insulating heat<\/li>\n\n\n\n<li>Guiding wafer movement<\/li>\n\n\n\n<li>Maintaining dimensions during temperature changes<\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\">Some semiconductor components combine structural and functional requirements.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">For example, an electrostatic chuck body must provide mechanical flatness, electrical behavior, thermal control and vacuum compatibility. A plasma window must resist chemical erosion while transmitting radio-frequency or microwave energy with controlled dielectric loss.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Fine ceramics include a broad range of engineered materials, and their properties can be adjusted through raw-material selection, particle size, additives and firing methods. This makes material grade selection just as important as choosing the general ceramic family.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">Why Semiconductor Equipment Uses Structural Ceramics<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">Structural ceramics are selected when an equipment component requires a combination of properties that is difficult to obtain from metal, glass or polymer materials.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Important ceramic characteristics may include:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Duret\u00e9 \u00e9lev\u00e9e<\/li>\n\n\n\n<li>Grande rigidit\u00e9<\/li>\n\n\n\n<li>Faible dilatation thermique<\/li>\n\n\n\n<li>Isolation \u00e9lectrique<\/li>\n\n\n\n<li>R\u00e9sistivit\u00e9 \u00e9lectrique contr\u00f4l\u00e9e<\/li>\n\n\n\n<li>High-temperature strength<\/li>\n\n\n\n<li>R\u00e9sistance au plasma<\/li>\n\n\n\n<li>R\u00e9sistance chimique<\/li>\n\n\n\n<li>R\u00e9sistance \u00e0 l'usure<\/li>\n\n\n\n<li>Stabilit\u00e9 dimensionnelle<\/li>\n\n\n\n<li>Faible production de particules<\/li>\n\n\n\n<li>High-purity composition<\/li>\n\n\n\n<li>Compatibilit\u00e9 avec le vide<\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\">Kyocera identifies high precision, mechanical performance, heat resistance, plasma resistance, low particle generation and low dielectric loss as important requirements for ceramic components used in semiconductor processing equipment.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">The required combination changes significantly from one process to another. A material suitable for a robot end effector may not be the best material for an etch focus ring, heater plate or high-temperature wafer boat.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">Main Structural Ceramic Components in Semiconductor Equipment<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">Ceramic parts are used throughout front-end and back-end semiconductor manufacturing equipment.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">Composants de manutention des wafers<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">Wafer handling components move wafers between load ports, cassettes, aligners, process chambers and inspection stations.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Les composants c\u00e9ramiques typiques sont les suivants<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Wafer end effectors<\/li>\n\n\n\n<li>Robot blades<\/li>\n\n\n\n<li>Wafer transfer arms<\/li>\n\n\n\n<li>Edge-gripping components<\/li>\n\n\n\n<li>Vacuum pickup pads<\/li>\n\n\n\n<li>Lift pins<\/li>\n\n\n\n<li>Alignment pins<\/li>\n\n\n\n<li>Guides de plaquettes<\/li>\n\n\n\n<li>Support pads<\/li>\n\n\n\n<li>Mandrins \u00e0 vide<\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\">Wafer-handling parts require high dimensional precision, controlled weight, sufficient stiffness and clean wafer-contact surfaces. Depending on the application, they may also require electrical insulation or static-dissipative properties.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">High-purity alumina, silicon carbide and other semiconductor-grade ceramics are used for wafer handling because they can provide abrasion resistance, dimensional stability and controlled surface performance.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">Important selection factors<\/h3>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Wafer diameter and thickness<\/li>\n\n\n\n<li>Robot speed and acceleration<\/li>\n\n\n\n<li>Maximum end-effector mass<\/li>\n\n\n\n<li>Blade deflection<\/li>\n\n\n\n<li>Contact-pad flatness<\/li>\n\n\n\n<li>Wafer backside sensitivity<\/li>\n\n\n\n<li>Vacuum pressure and leakage<\/li>\n\n\n\n<li>Electrical resistivity<\/li>\n\n\n\n<li>Particle-generation limits<\/li>\n\n\n\n<li>Cleaning requirements<\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\">For high-speed and long-reach robot arms, specific stiffness\u2014the relationship between elastic modulus and density\u2014is often more important than either stiffness or density considered separately.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">Vacuum Chucks and Precision Wafer Stages<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">Vacuum chucks hold wafers during:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Inspection<\/li>\n\n\n\n<li>M\u00e9trologie<\/li>\n\n\n\n<li>Lithographie<\/li>\n\n\n\n<li>D\u00e9coupage<\/li>\n\n\n\n<li>Back grinding<\/li>\n\n\n\n<li>Rev\u00eatement<\/li>\n\n\n\n<li>Alignment<\/li>\n\n\n\n<li>Usinage de pr\u00e9cision<\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\">Ceramic vacuum chucks may use:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Machined vacuum grooves<\/li>\n\n\n\n<li>Porous ceramic surfaces<\/li>\n\n\n\n<li>Pin-support structures<\/li>\n\n\n\n<li>Independent vacuum zones<\/li>\n\n\n\n<li>Peripheral sealing lands<\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\">The chuck must provide sufficient holding force while controlling wafer deformation, backside particles and release behavior.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Kyocera supplies high-precision ceramic vacuum chucks with different surface patterns for wafer holding and transport. The same type of ceramic technology is also used for precision stage components in lithography and inspection equipment.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">Critical design requirements<\/h3>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Chuck surface flatness<\/li>\n\n\n\n<li>Parallelism to the mounting datum<\/li>\n\n\n\n<li>Rugosit\u00e9 de la surface<\/li>\n\n\n\n<li>Vacuum-groove geometry<\/li>\n\n\n\n<li>Porous-material permeability<\/li>\n\n\n\n<li>Effective vacuum area<\/li>\n\n\n\n<li>Wafer edge exclusion<\/li>\n\n\n\n<li>Dilatation thermique<\/li>\n\n\n\n<li>Mounting-induced distortion<\/li>\n\n\n\n<li>Electrical resistance<\/li>\n\n\n\n<li>Cleaning and packaging<\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\">A ceramic chuck should not be specified only by outside diameter and flatness. The supplier also needs the wafer thickness, bow, warp, operating pressure, temperature and loaded-flatness requirement.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">Electrostatic Chuck Components<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">Electrostatic chucks use electrostatic force to hold a wafer during etching, deposition, implantation and other processes.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Ceramic portions of an electrostatic chuck may be required to provide:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Wafer support and flatness correction<\/li>\n\n\n\n<li>Isolation \u00e9lectrique<\/li>\n\n\n\n<li>R\u00e9sistivit\u00e9 \u00e9lectrique contr\u00f4l\u00e9e<\/li>\n\n\n\n<li>Embedded electrode insulation<\/li>\n\n\n\n<li>Thermal conduction<\/li>\n\n\n\n<li>Gas-channel integration<\/li>\n\n\n\n<li>R\u00e9sistance au plasma<\/li>\n\n\n\n<li>Stabilit\u00e9 dimensionnelle<\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\">Electrostatic chucks are also used to support wafer cooling during semiconductor processing.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Common material candidates include:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Alumine<\/li>\n\n\n\n<li>Aluminum nitride<\/li>\n\n\n\n<li>Controlled-resistivity ceramics<\/li>\n\n\n\n<li>Ceramic coatings<\/li>\n\n\n\n<li>Composite ceramic structures<\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\">The exact ceramic grade must be selected according to chucking method, voltage, process temperature, backside cooling gas, plasma exposure and electrical-resistance requirements.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">Etch Chamber Components<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">Plasma etching exposes chamber parts to reactive gases, ion bombardment, RF energy, volatile byproducts and repeated chamber-cleaning cycles.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Les composants c\u00e9ramiques typiques sont les suivants<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Bagues de mise au point<\/li>\n\n\n\n<li>Anneaux de bordure<\/li>\n\n\n\n<li>Buses<\/li>\n\n\n\n<li>Gas injectors<\/li>\n\n\n\n<li>Showerheads<\/li>\n\n\n\n<li>Chamber windows<\/li>\n\n\n\n<li>Chamber lids<\/li>\n\n\n\n<li>Shields<\/li>\n\n\n\n<li>Liners<\/li>\n\n\n\n<li>Isolants<\/li>\n\n\n\n<li>Plasma-resistant domes<\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\">Focus and edge rings help control conditions around the wafer perimeter. Nozzles and injectors distribute process gases, while dielectric windows may transmit RF or microwave energy into the plasma chamber.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">These parts require combinations of:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Plasma erosion resistance<\/li>\n\n\n\n<li>Haute puret\u00e9<\/li>\n\n\n\n<li>Chemical compatibility<\/li>\n\n\n\n<li>Dielectric strength<\/li>\n\n\n\n<li>Faible perte di\u00e9lectrique<\/li>\n\n\n\n<li>Stabilit\u00e9 dimensionnelle<\/li>\n\n\n\n<li>Faible production de particules<\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\">CoorsTek lists focus rings, nozzles, windows, lids, shields and showerheads among the ceramic components used in plasma-etch equipment.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">Deposition Chamber Components<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">Chemical vapor deposition, physical vapor deposition, atomic layer deposition and related processes may combine:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Reactive precursor gases<\/li>\n\n\n\n<li>Plasma<\/li>\n\n\n\n<li>Elevated temperatures<\/li>\n\n\n\n<li>Vacuum<\/li>\n\n\n\n<li>Repeated cleaning chemistry<\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\">Ceramic deposition components include:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Chamber domes<\/li>\n\n\n\n<li>Rev\u00eatements de chambre<\/li>\n\n\n\n<li>Deposition rings<\/li>\n\n\n\n<li>Plaques de distribution de gaz<\/li>\n\n\n\n<li>Showerheads<\/li>\n\n\n\n<li>Pedestal-heater components<\/li>\n\n\n\n<li>Plating insulators<\/li>\n\n\n\n<li>Vacuum-break filters<\/li>\n\n\n\n<li>Electrical isolators<\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\">Deposition rings and chamber liners are directly exposed to the process environment, making purity, plasma durability and resistance to coating buildup important.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">High-purity alumina, aluminum nitride, silicon carbide and plasma-resistant coatings are among the material systems used for deposition equipment.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">Ceramic Heaters and Pedestal Components<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">Ceramic heaters may integrate a resistive heating element within a ceramic body.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Les applications comprennent<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Wafer heating<\/li>\n\n\n\n<li>Temperature-controlled process pedestals<\/li>\n\n\n\n<li>Vacuum heating<\/li>\n\n\n\n<li>Deposition equipment<\/li>\n\n\n\n<li>Etch equipment<\/li>\n\n\n\n<li>Analytical equipment<\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\">The ceramic body may need to provide:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Isolation \u00e9lectrique<\/li>\n\n\n\n<li>Uniform heat distribution<\/li>\n\n\n\n<li>Controlled thermal expansion<\/li>\n\n\n\n<li>Mechanical flatness<\/li>\n\n\n\n<li>Thermal-cycle resistance<\/li>\n\n\n\n<li>Compatibilit\u00e9 avec le vide<\/li>\n\n\n\n<li>Gas-channel integration<\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\">Aluminum nitride is often considered for heater and pedestal applications because it combines electrical insulation with relatively high thermal conductivity. Alumina can also be appropriate when temperature, thermal-uniformity and cost requirements permit.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">Wafer Boats and High-Temperature Fixtures<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">Ceramic wafer boats, carriers and furnace fixtures support wafers during thermal processing.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">These components may be exposed to:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>High temperature<\/li>\n\n\n\n<li>Repeated heating and cooling<\/li>\n\n\n\n<li>Process gases<\/li>\n\n\n\n<li>Chargement m\u00e9canique<\/li>\n\n\n\n<li>Long service cycles<\/li>\n\n\n\n<li>Wafer-contact cleanliness requirements<\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\">Typical ceramic materials include:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Alumine de haute puret\u00e9<\/li>\n\n\n\n<li>Silicon carbide<\/li>\n\n\n\n<li>Recrystallized silicon carbide<\/li>\n\n\n\n<li>Reaction-bonded silicon carbide<\/li>\n\n\n\n<li>CVD-coated silicon carbide<\/li>\n\n\n\n<li>Sapphire for selected applications<\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\">The material and design must account for:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Temp\u00e9rature maximale de fonctionnement<\/li>\n\n\n\n<li>Thermal gradients<\/li>\n\n\n\n<li>Wafer size<\/li>\n\n\n\n<li>Espacement des fentes<\/li>\n\n\n\n<li>Carrier orientation<\/li>\n\n\n\n<li>Process-gas chemistry<\/li>\n\n\n\n<li>Allowable contamination<\/li>\n\n\n\n<li>Thermal mass<\/li>\n\n\n\n<li>Dimensional change over service life<\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\">Alumina wafer boats are used because of their heat, wear and chemical resistance, while SiC materials may be selected when higher thermal conductivity, rigidity or high-temperature strength is required.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">Inspection, Metrology and Lithography Components<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">Semiconductor inspection and lithography equipment require accurate positioning and stable dimensions.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Ceramic components may include:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>\u00c9tapes de pr\u00e9cision<\/li>\n\n\n\n<li>Stage bases<\/li>\n\n\n\n<li>Integrated mirror structures<\/li>\n\n\n\n<li>Wafer chucks<\/li>\n\n\n\n<li>Guide components<\/li>\n\n\n\n<li>Probe-card components<\/li>\n\n\n\n<li>Alignment structures<\/li>\n\n\n\n<li>Cutter and grinder components<\/li>\n\n\n\n<li>Metrology frames<\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\">These applications often prioritize:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Grande rigidit\u00e9<\/li>\n\n\n\n<li>Low moving mass<\/li>\n\n\n\n<li>Faible dilatation thermique<\/li>\n\n\n\n<li>Vibration stability<\/li>\n\n\n\n<li>High surface accuracy<\/li>\n\n\n\n<li>Repeatable mounting<\/li>\n\n\n\n<li>Stabilit\u00e9 dimensionnelle \u00e0 long terme<\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\">Cordierite and silicon carbide can be considered for lightweight precision structures, while alumina is frequently used for insulating and general precision components.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Kyocera reports that precision ceramic components are used in probers, wafer cutters, back grinders, inspection equipment and wafer-transfer systems.<\/p>\n\n\n\n<h1 class=\"wp-block-heading\">Structural Ceramic Material Selection<\/h1>\n\n\n\n<p class=\"wp-block-paragraph\">Material selection should start with the component\u2019s actual operating conditions rather than with a preferred material name.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">Alumine<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">Alumina, or aluminum oxide, is one of the most widely used technical ceramics.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Its general advantages include:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Bonne r\u00e9sistance m\u00e9canique<\/li>\n\n\n\n<li>Duret\u00e9 \u00e9lev\u00e9e<\/li>\n\n\n\n<li>Isolation \u00e9lectrique<\/li>\n\n\n\n<li>R\u00e9sistance \u00e0 l'usure<\/li>\n\n\n\n<li>R\u00e9sistance chimique<\/li>\n\n\n\n<li>Availability in multiple purity grades<\/li>\n\n\n\n<li>Established precision-machining methods<\/li>\n\n\n\n<li>Competitive cost relative to many specialized ceramics<\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\">Higher-purity alumina grades are often selected for semiconductor chamber components because they provide improved corrosion, wear and contamination performance compared with lower-purity industrial grades.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">Common semiconductor applications<\/h3>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Isolants \u00e9lectriques<\/li>\n\n\n\n<li>Robot blades<\/li>\n\n\n\n<li>Buses<\/li>\n\n\n\n<li>Rev\u00eatements de chambre<\/li>\n\n\n\n<li>Bateaux \u00e0 galettes<\/li>\n\n\n\n<li>Vacuum components<\/li>\n\n\n\n<li>Heater bodies<\/li>\n\n\n\n<li>Lift pins<\/li>\n\n\n\n<li>Mechanical supports<\/li>\n\n\n\n<li>Gas-distribution parts<\/li>\n<\/ul>\n\n\n\n<h3 class=\"wp-block-heading\">Important limitations<\/h3>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Higher thermal expansion than some SiC grades<\/li>\n\n\n\n<li>Lower thermal conductivity than AlN and many SiC materials<\/li>\n\n\n\n<li>Brittle response at sharp corners and thin sections<\/li>\n\n\n\n<li>Standard grades may not provide sufficient plasma resistance for demanding chamber locations<\/li>\n\n\n\n<li>Electrically insulating alumina may retain static charge unless an ESD-safe grade or coating is used<\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\">The RFQ should state the required alumina purity rather than simply specifying \u201calumina ceramic.\u201d<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">Carbure de silicium<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">Silicon carbide offers a strong combination of:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Duret\u00e9 \u00e9lev\u00e9e<\/li>\n\n\n\n<li>Grande rigidit\u00e9<\/li>\n\n\n\n<li>Relatively low density<\/li>\n\n\n\n<li>Conductivit\u00e9 thermique \u00e9lev\u00e9e<\/li>\n\n\n\n<li>Faible dilatation thermique<\/li>\n\n\n\n<li>High-temperature strength<\/li>\n\n\n\n<li>R\u00e9sistance \u00e0 l'usure<\/li>\n\n\n\n<li>R\u00e9sistance chimique<\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\">Kyocera identifies SiC as a hard, chemically resistant ceramic with high thermal conductivity and strength retention at elevated temperatures.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">Common semiconductor applications<\/h3>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Wafer end effectors<\/li>\n\n\n\n<li>\u00c9tapes de pr\u00e9cision<\/li>\n\n\n\n<li>Mandrins \u00e0 vide<\/li>\n\n\n\n<li>Bagues de mise au point<\/li>\n\n\n\n<li>Anneaux de bordure<\/li>\n\n\n\n<li>Suscepteurs<\/li>\n\n\n\n<li>Appareils \u00e0 haute temp\u00e9rature<\/li>\n\n\n\n<li>Bateaux \u00e0 galettes<\/li>\n\n\n\n<li>Pi\u00e8ces de la chambre<\/li>\n\n\n\n<li>CVD or epitaxy components<\/li>\n<\/ul>\n\n\n\n<h3 class=\"wp-block-heading\">SiC grade differences<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">The term \u201csilicon carbide\u201d may refer to several different material systems:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Pressureless-sintered SiC<\/li>\n\n\n\n<li>Reaction-bonded SiC<\/li>\n\n\n\n<li>Silicon-infiltrated SiC<\/li>\n\n\n\n<li>SiC recristallis\u00e9<\/li>\n\n\n\n<li>CVD SiC<\/li>\n\n\n\n<li>CVD-coated graphite<\/li>\n\n\n\n<li>CVD-coated bulk SiC<\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\">These grades differ in:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Free-silicon content<\/li>\n\n\n\n<li>Densit\u00e9<\/li>\n\n\n\n<li>Porosity<\/li>\n\n\n\n<li>La puret\u00e9<\/li>\n\n\n\n<li>Electrical resistivity<\/li>\n\n\n\n<li>Conductivit\u00e9 thermique<\/li>\n\n\n\n<li>Oxidation behavior<\/li>\n\n\n\n<li>R\u00e9sistance au plasma<\/li>\n\n\n\n<li>Machining method<\/li>\n\n\n\n<li>Maximum practical component size<\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\">A reaction-bonded SiC component containing residual silicon should not automatically be treated as equivalent to high-purity sintered or CVD SiC.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">CVD Silicon Carbide<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">Chemical vapor deposited silicon carbide may be supplied as:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Free-standing CVD SiC<\/li>\n\n\n\n<li>A CVD SiC coating on graphite<\/li>\n\n\n\n<li>A CVD SiC coating on another SiC substrate<\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\">CVD SiC is used in demanding semiconductor environments requiring high purity, corrosion resistance, wear resistance, oxidation resistance and high-temperature performance.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">Potential applications<\/h3>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Plasma-exposed rings<\/li>\n\n\n\n<li>Chamber components<\/li>\n\n\n\n<li>Epitaxy susceptors<\/li>\n\n\n\n<li>High-purity liners<\/li>\n\n\n\n<li>Thin-wall process parts<\/li>\n\n\n\n<li>Protective coatings<\/li>\n\n\n\n<li>Components exposed to aggressive process chemistry<\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\">The substrate, coating thickness, coating continuity and thermal-expansion relationship must all be considered when CVD SiC is used as a coating rather than as a free-standing part.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">Nitrure d'aluminium<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">Le nitrure d'aluminium se combine :<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Isolation \u00e9lectrique<\/li>\n\n\n\n<li>Relatively high thermal conductivity<\/li>\n\n\n\n<li>Moderate thermal expansion<\/li>\n\n\n\n<li>Stabilit\u00e9 thermique<\/li>\n\n\n\n<li>Compatibility with integrated heating structures<\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\">Unlike many electrically insulating ceramics, AlN can transfer heat efficiently while maintaining electrical isolation.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">Common semiconductor applications<\/h3>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Chauffages en c\u00e9ramique<\/li>\n\n\n\n<li>Electrostatic chuck bodies<\/li>\n\n\n\n<li>Pedestal components<\/li>\n\n\n\n<li>Thermal-management parts<\/li>\n\n\n\n<li>Isolants \u00e9lectriques<\/li>\n\n\n\n<li>High-temperature wafer-support components<\/li>\n\n\n\n<li>Heat-spreading structures<\/li>\n<\/ul>\n\n\n\n<h3 class=\"wp-block-heading\">Important limitations<\/h3>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Material properties vary significantly by grade<\/li>\n\n\n\n<li>Moisture and cleaning-chemistry compatibility require review<\/li>\n\n\n\n<li>Machining and finishing can be more demanding than for common alumina grades<\/li>\n\n\n\n<li>Surface oxidation and long-term environmental exposure should be evaluated<\/li>\n\n\n\n<li>Cost is generally higher than standard alumina<\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\">AlN should be selected when its thermal and electrical combination is necessary, not simply because it is considered a more advanced ceramic.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">Nitrure de silicium<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">Silicon nitride is known for:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>R\u00e9sistance m\u00e9canique \u00e9lev\u00e9e<\/li>\n\n\n\n<li>Improved fracture resistance compared with many conventional ceramics<\/li>\n\n\n\n<li>R\u00e9sistance \u00e0 l'usure<\/li>\n\n\n\n<li>Faible dilatation thermique<\/li>\n\n\n\n<li>Thermal-shock resistance<\/li>\n\n\n\n<li>Strength retention at elevated temperatures<\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\">Kyocera describes silicon nitride as a high-strength ceramic with strong wear and thermal-shock performance.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">Potential semiconductor applications<\/h3>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Mechanically loaded support components<\/li>\n\n\n\n<li>Lift pins<\/li>\n\n\n\n<li>Wear components<\/li>\n\n\n\n<li>Precision moving parts<\/li>\n\n\n\n<li>Thin structural features<\/li>\n\n\n\n<li>Components exposed to repeated temperature changes<\/li>\n\n\n\n<li>Selected focus rings and chamber parts<\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\">Silicon nitride may be valuable where mechanical shock and fracture risk are more important than maximum stiffness or thermal conductivity.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">Zircone<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">Zirconia offers:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>T\u00e9nacit\u00e9 \u00e9lev\u00e9e \u00e0 la rupture<\/li>\n\n\n\n<li>High strength<\/li>\n\n\n\n<li>R\u00e9sistance \u00e0 l'usure<\/li>\n\n\n\n<li>Good surface finish<\/li>\n\n\n\n<li>Resistance to local mechanical damage<\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\">Compared with alumina and SiC, zirconia generally has:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Higher density<\/li>\n\n\n\n<li>Lower stiffness<\/li>\n\n\n\n<li>Dilatation thermique plus \u00e9lev\u00e9e<\/li>\n\n\n\n<li>Conductivit\u00e9 thermique plus faible<\/li>\n<\/ul>\n\n\n\n<h3 class=\"wp-block-heading\">Potential semiconductor applications<\/h3>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Wear pads<\/li>\n\n\n\n<li>Small alignment parts<\/li>\n\n\n\n<li>Composants des soupapes<\/li>\n\n\n\n<li>Precision plungers<\/li>\n\n\n\n<li>Mechanical inserts<\/li>\n\n\n\n<li>Contact tips<\/li>\n\n\n\n<li>Components requiring greater resistance to chipping<\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\">Zirconia is often more suitable for small wear-resistant or mechanically sensitive components than for large lightweight stage structures or robot arms.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">Yttria<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">Yttria, or yttrium oxide, is particularly important for plasma-exposed components.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Its principal benefit is strong resistance to plasma corrosion, which can help reduce the generation of particles and unwanted impurities in semiconductor plasma processes.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Yttria may be used as:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>A bulk ceramic<\/li>\n\n\n\n<li>A coating on alumina<\/li>\n\n\n\n<li>A coating on aluminum nitride<\/li>\n\n\n\n<li>A chamber-protection layer<\/li>\n\n\n\n<li>A plasma-facing surface<\/li>\n<\/ul>\n\n\n\n<h3 class=\"wp-block-heading\">Typical applications<\/h3>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Etch chamber liners<\/li>\n\n\n\n<li>Plasma-resistant rings<\/li>\n\n\n\n<li>Domes<\/li>\n\n\n\n<li>Shields<\/li>\n\n\n\n<li>Chamber walls<\/li>\n\n\n\n<li>Buses<\/li>\n\n\n\n<li>Coated electrostatic chuck parts<\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\">A yttria coating must be evaluated for:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Coating thickness<\/li>\n\n\n\n<li>Adhesion<\/li>\n\n\n\n<li>Porosity<\/li>\n\n\n\n<li>Finition de la surface<\/li>\n\n\n\n<li>Plasma-erosion uniformity<\/li>\n\n\n\n<li>Edge coverage<\/li>\n\n\n\n<li>Cyclage thermique<\/li>\n\n\n\n<li>Cleaning compatibility<\/li>\n\n\n\n<li>Particle shedding<\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\">Bulk yttria and yttria coatings do not necessarily provide identical performance.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">Cordierite<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">Cordierite has an extremely low coefficient of thermal expansion and can provide good dimensional stability under temperature change.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">It is used for structural parts in semiconductor equipment and precision optical structures where low thermal distortion is important.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">Potential applications<\/h3>\n\n\n\n<ul class=\"wp-block-list\">\n<li>\u00c9tapes de pr\u00e9cision<\/li>\n\n\n\n<li>Metrology structures<\/li>\n\n\n\n<li>Mirror substrates<\/li>\n\n\n\n<li>Inspection-equipment components<\/li>\n\n\n\n<li>Thermally stable support frames<\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\">Cordierite is not usually selected for the most aggressive plasma or wear environments. Its primary value is thermal dimensional stability.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">C\u00e9ramiques poreuses<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">Porous ceramics contain a controlled network of pores that allows gas flow through the material.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">In semiconductor equipment, they may be used for:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Mandrins \u00e0 vide<\/li>\n\n\n\n<li>Wafer-support surfaces<\/li>\n\n\n\n<li>Gas-distribution components<\/li>\n\n\n\n<li>Vacuum-break filters<\/li>\n\n\n\n<li>Air-bearing or handling functions<\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\">Important porous-material specifications include:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Average pore size<\/li>\n\n\n\n<li>Pore-size distribution<\/li>\n\n\n\n<li>Porosity<\/li>\n\n\n\n<li>Air permeability<\/li>\n\n\n\n<li>Surface flatness<\/li>\n\n\n\n<li>Rugosit\u00e9 de la surface<\/li>\n\n\n\n<li>Particle release<\/li>\n\n\n\n<li>Cleaning method<\/li>\n\n\n\n<li>Pressure drop<\/li>\n\n\n\n<li>Structural strength<\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\">Porosity should not be specified alone. Two ceramics with a similar porosity percentage can have very different permeability and vacuum behavior because their pore sizes and internal structures differ.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Semiconductive ceramic coatings can also be combined with porous chuck materials to provide static-control functionality while maintaining air permeability.<\/p>\n\n\n\n<h1 class=\"wp-block-heading\">Component-to-Material Selection Guide<\/h1>\n\n\n\n<figure class=\"wp-block-table\"><table class=\"has-fixed-layout\"><thead><tr><th>Component<\/th><th>Common Material Options<\/th><th>Primary Selection Requirements<\/th><\/tr><\/thead><tbody><tr><td>Wafer end effector<\/td><td>Alumina, SiC, ESD-safe ceramic<\/td><td>Low weight, stiffness, flatness, particle control<\/td><\/tr><tr><td>Vacuum chuck<\/td><td>Alumina, SiC, porous ceramic<\/td><td>Flatness, permeability, vacuum distribution, cleanliness<\/td><\/tr><tr><td>Electrostatic chuck body<\/td><td>Alumina, AlN, controlled-resistivity ceramic<\/td><td>Dielectric behavior, thermal control, flatness<\/td><\/tr><tr><td>Focus or edge ring<\/td><td>SiC, CVD SiC, alumina, yttria-based material<\/td><td>Plasma resistance, purity, dimensional stability<\/td><\/tr><tr><td>Chamber liner<\/td><td>High-purity alumina, AlN, SiC, yttria coating<\/td><td>Plasma and chemical resistance, low particles<\/td><\/tr><tr><td>Nozzle or injector<\/td><td>Alumina, SiC, yttria-coated ceramic<\/td><td>Gas-flow precision, erosion resistance, purity<\/td><\/tr><tr><td>Showerhead<\/td><td>Alumina, AlN, SiC<\/td><td>Hole accuracy, plasma resistance, thermal stability<\/td><\/tr><tr><td>Ceramic heater<\/td><td>AlN, alumina<\/td><td>Electrical insulation, heat distribution, thermal cycling<\/td><\/tr><tr><td>Wafer boat<\/td><td>Alumina, SiC, recrystallized SiC<\/td><td>Temperature, thermal shock, purity, slot stability<\/td><\/tr><tr><td>Lift pin<\/td><td>Alumina, silicon nitride, SiC<\/td><td>Straightness, wear, fracture resistance<\/td><\/tr><tr><td>Precision stage<\/td><td>SiC, cordierite, alumina<\/td><td>Stiffness, weight, thermal expansion, geometry<\/td><\/tr><tr><td>Wear insert<\/td><td>Zirconia, silicon nitride, alumina<\/td><td>Toughness, wear resistance, surface finish<\/td><\/tr><tr><td>Plasma-resistant coating<\/td><td>Yttria, CVD SiC, other engineered coatings<\/td><td>Erosion rate, adhesion, purity, particle behavior<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n<p class=\"wp-block-paragraph\">This table is a starting point rather than a universal specification. Final material selection must be based on the process gas, temperature, plasma energy, electrical design and contamination limits.<\/p>\n\n\n\n<h1 class=\"wp-block-heading\">Key Material Selection Criteria<\/h1>\n\n\n\n<h2 class=\"wp-block-heading\">Mechanical Stiffness<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">Stiffness is important for:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Robot blades<\/li>\n\n\n\n<li>Long support arms<\/li>\n\n\n\n<li>\u00c9tapes de pr\u00e9cision<\/li>\n\n\n\n<li>Mandrins \u00e0 vide<\/li>\n\n\n\n<li>Large chamber components<\/li>\n\n\n\n<li>Porteurs de plaquettes<\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\">Higher elastic modulus can reduce deflection, but geometry often has an equally important effect.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">A thin, poorly supported SiC component can still deflect more than a properly ribbed alumina component. Material and structural design must therefore be evaluated together.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">Strength and Fracture Toughness<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">Ceramics are generally strong under compression but more sensitive to tensile stress, impact and edge defects.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Fracture risk is affected by:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Sharp corners<\/li>\n\n\n\n<li>Small internal radii<\/li>\n\n\n\n<li>Surface grinding damage<\/li>\n\n\n\n<li>Edge chips<\/li>\n\n\n\n<li>Bolt preload<\/li>\n\n\n\n<li>Thermal gradients<\/li>\n\n\n\n<li>Uneven support<\/li>\n\n\n\n<li>Local impact<\/li>\n\n\n\n<li>Internal channels<\/li>\n\n\n\n<li>Porosity<\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\">Zirconia and silicon nitride are often considered when resistance to fracture or mechanical shock is more important than maximum stiffness.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">Conductivit\u00e9 thermique<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">Thermal conductivity affects:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Heater uniformity<\/li>\n\n\n\n<li>Pedestal temperature distribution<\/li>\n\n\n\n<li>Wafer cooling<\/li>\n\n\n\n<li>Thermal response time<\/li>\n\n\n\n<li>Temperature gradients<\/li>\n\n\n\n<li>Local hot spots<\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\">AlN and many SiC materials provide higher thermal conductivity than conventional alumina. However, conductivity values can vary substantially by ceramic grade and manufacturing method.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">Coefficient de dilatation thermique<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">Thermal expansion influences:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Dimensional drift<\/li>\n\n\n\n<li>Wafer-position accuracy<\/li>\n\n\n\n<li>Flatness at temperature<\/li>\n\n\n\n<li>Metal-to-ceramic joint stress<\/li>\n\n\n\n<li>Coating adhesion<\/li>\n\n\n\n<li>Thermal-cycle durability<\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\">Fine ceramics generally expand less than many common metals, while SiC, silicon nitride and cordierite can provide especially low thermal expansion for precision structural applications.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Material selection must also consider the thermal expansion of any metal base, bonded insert, coating or mating component.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">R\u00e9sistance au plasma<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">Plasma resistance is critical for components directly exposed to etch or plasma-enhanced deposition environments.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Poor material compatibility can produce:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Surface erosion<\/li>\n\n\n\n<li>Roughness increase<\/li>\n\n\n\n<li>G\u00e9n\u00e9ration de particules<\/li>\n\n\n\n<li>Metallic contamination<\/li>\n\n\n\n<li>Dimensional change<\/li>\n\n\n\n<li>Shortened maintenance intervals<\/li>\n\n\n\n<li>Process drift<\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\">The correct material depends on the exact plasma chemistry. A ceramic that performs well in one fluorine-, chlorine- or oxygen-based process may not provide the same performance in another.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Yttria and selected high-purity SiC or alumina systems are used where plasma resistance and contamination control are priorities.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">La puret\u00e9<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">Purity is especially important for:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Chamber-facing components<\/li>\n\n\n\n<li>Wafer-contact parts<\/li>\n\n\n\n<li>High-temperature parts<\/li>\n\n\n\n<li>Plasma-exposed surfaces<\/li>\n\n\n\n<li>Components near sensitive process regions<\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\">The total ceramic purity does not tell the complete contamination story.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Procurement specifications may also need to control:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Individual metallic impurities<\/li>\n\n\n\n<li>Sintering additives<\/li>\n\n\n\n<li>Free silicon<\/li>\n\n\n\n<li>Carbon content<\/li>\n\n\n\n<li>Alkali elements<\/li>\n\n\n\n<li>Rare-earth additives<\/li>\n\n\n\n<li>Surface residues<\/li>\n\n\n\n<li>Cleaning chemistry<\/li>\n\n\n\n<li>Packaging contamination<\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\">A nominal \u201c99.5% alumina\u201d and a \u201c99.5% semiconductor-grade alumina\u201d may not have identical impurity distributions or processing controls.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">Propri\u00e9t\u00e9s \u00e9lectriques<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">Ceramic components may need to be:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Highly insulating<\/li>\n\n\n\n<li>Static dissipative<\/li>\n\n\n\n<li>Semiconductive<\/li>\n\n\n\n<li>Conductive<\/li>\n\n\n\n<li>RF transparent<\/li>\n\n\n\n<li>Low-loss dielectric<\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\">Electrical requirements should be stated numerically where possible.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Relevant specifications include:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Volume resistivity<\/li>\n\n\n\n<li>Surface resistance<\/li>\n\n\n\n<li>Dielectric strength<\/li>\n\n\n\n<li>Dielectric constant<\/li>\n\n\n\n<li>Loss tangent<\/li>\n\n\n\n<li>Test temperature<\/li>\n\n\n\n<li>Test humidity<\/li>\n\n\n\n<li>Test frequency<\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\">Simply specifying \u201cESD-safe\u201d or \u201celectrically insulating\u201d may not be sufficient for a critical semiconductor component.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">Contr\u00f4le des particules<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">Particles can originate from:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Plasma erosion<\/li>\n\n\n\n<li>Surface wear<\/li>\n\n\n\n<li>Ceramic chipping<\/li>\n\n\n\n<li>Wafer sliding<\/li>\n\n\n\n<li>Coating delamination<\/li>\n\n\n\n<li>Machining residue<\/li>\n\n\n\n<li>Contaminated pores<\/li>\n\n\n\n<li>Loose inserts<\/li>\n\n\n\n<li>Cleaning damage<\/li>\n\n\n\n<li>Deposited-film flaking<\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\">Particle performance depends on the entire component design, not just material purity.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Important controls include:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Rounded edges<\/li>\n\n\n\n<li>Stable contact geometry<\/li>\n\n\n\n<li>Controlled surface roughness<\/li>\n\n\n\n<li>Appropriate coating adhesion<\/li>\n\n\n\n<li>Thorough post-machining cleaning<\/li>\n\n\n\n<li>Cleanroom packaging<\/li>\n\n\n\n<li>Minimized sliding contact<\/li>\n\n\n\n<li>Accessible cleaning paths<\/li>\n\n\n\n<li>Elimination of blind contamination traps<\/li>\n<\/ul>\n\n\n\n<h2 class=\"wp-block-heading\">Rugosit\u00e9 de surface<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">Surface roughness affects:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Wafer contact<\/li>\n\n\n\n<li>Friction<\/li>\n\n\n\n<li>Sealing<\/li>\n\n\n\n<li>Coating adhesion<\/li>\n\n\n\n<li>Particle retention<\/li>\n\n\n\n<li>Plasma interaction<\/li>\n\n\n\n<li>Nettoyage<\/li>\n\n\n\n<li>Optical or metrology performance<\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\">Different surfaces on the same component may require different finishes.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Par exemple :<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>A vacuum-sealing land may need a fine finish.<\/li>\n\n\n\n<li>A bonded or coated surface may need controlled roughness for adhesion.<\/li>\n\n\n\n<li>A wafer contact pad may require a finish that balances low scratching with reliable release.<\/li>\n\n\n\n<li>A plasma-facing surface may require a defined initial texture.<\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\">A drawing should identify the exact surfaces to which each roughness requirement applies.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">R\u00e9sistance chimique<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">Alumina and SiC are used in many chemically demanding environments because of their chemical stability, but compatibility must still be confirmed against the actual process and cleaning chemistry.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">The supplier should receive details of:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Process gases<\/li>\n\n\n\n<li>Cleaning gases<\/li>\n\n\n\n<li>Acides<\/li>\n\n\n\n<li>Alcalis<\/li>\n\n\n\n<li>Solvants<\/li>\n\n\n\n<li>Plasma chemistry<\/li>\n\n\n\n<li>Exposure temperature<\/li>\n\n\n\n<li>Exposure time<\/li>\n\n\n\n<li>Cleaning frequency<\/li>\n<\/ul>\n\n\n\n<h2 class=\"wp-block-heading\">Compatibilit\u00e9 avec le vide<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">Ceramic materials are generally attractive for vacuum systems, but the completed component may still contain potential contamination sources.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">These include:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Organic adhesives<\/li>\n\n\n\n<li>Joints<\/li>\n\n\n\n<li>Metal inserts<\/li>\n\n\n\n<li>Lubricants<\/li>\n\n\n\n<li>Cleaning residues<\/li>\n\n\n\n<li>Open porosity<\/li>\n\n\n\n<li>Trapped blind volumes<\/li>\n\n\n\n<li>Coatings<\/li>\n\n\n\n<li>Marking materials<\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\">The complete assembly, rather than only the ceramic body, should be assessed for vacuum compatibility and outgassing.<\/p>\n\n\n\n<h1 class=\"wp-block-heading\">Ceramic Grade and Manufacturing Route Matter<\/h1>\n\n\n\n<p class=\"wp-block-paragraph\">Two parts made from the same nominal ceramic family may perform differently because of differences in manufacturing.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Relevant processes include:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Pressage \u00e0 sec<\/li>\n\n\n\n<li>Isostatic pressing<\/li>\n\n\n\n<li>Extrusion<\/li>\n\n\n\n<li>Slip casting<\/li>\n\n\n\n<li>Moulage par injection<\/li>\n\n\n\n<li>Pressureless sintering<\/li>\n\n\n\n<li>Hot pressing<\/li>\n\n\n\n<li>Hot isostatic pressing<\/li>\n\n\n\n<li>Reaction bonding<\/li>\n\n\n\n<li>Chemical vapor deposition<\/li>\n\n\n\n<li>Green machining<\/li>\n\n\n\n<li>Meulage au diamant<\/li>\n\n\n\n<li>Lapping<\/li>\n\n\n\n<li>Polissage<\/li>\n\n\n\n<li>Usinage au laser<\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\">These processes influence:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Grain size<\/li>\n\n\n\n<li>Porosity<\/li>\n\n\n\n<li>Densit\u00e9<\/li>\n\n\n\n<li>Residual stress<\/li>\n\n\n\n<li>Strength<\/li>\n\n\n\n<li>Surface condition<\/li>\n\n\n\n<li>Maximum part size<\/li>\n\n\n\n<li>Dimensional capability<\/li>\n\n\n\n<li>Co\u00fbt<\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\">The material designation on the drawing should therefore reference an approved grade or a clearly defined property specification.<\/p>\n\n\n\n<h1 class=\"wp-block-heading\">Design for Ceramic Manufacturing<\/h1>\n\n\n\n<p class=\"wp-block-paragraph\">Ceramic components should not simply copy metal-part geometry.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">Avoid Sharp Internal Corners<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">Sharp internal corners create stress concentration and can be difficult to machine reliably.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Use:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Generous internal radii<\/li>\n\n\n\n<li>Smooth section transitions<\/li>\n\n\n\n<li>Rounded pocket ends<\/li>\n\n\n\n<li>Gradual changes in wall thickness<\/li>\n<\/ul>\n\n\n\n<h2 class=\"wp-block-heading\">Control Wall Thickness<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">Very thin walls can create difficulties during:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Forming<\/li>\n\n\n\n<li>Sintering<\/li>\n\n\n\n<li>Handling<\/li>\n\n\n\n<li>Broyage<\/li>\n\n\n\n<li>Nettoyage<\/li>\n\n\n\n<li>Installation<\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\">Large differences in adjacent wall thickness can also contribute to distortion during firing.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">Design Holes Carefully<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">Hole design should consider:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Hole diameter<\/li>\n\n\n\n<li>Depth-to-diameter ratio<\/li>\n\n\n\n<li>Distance from an edge<\/li>\n\n\n\n<li>Distance between holes<\/li>\n\n\n\n<li>Intersecting channels<\/li>\n\n\n\n<li>Required positional tolerance<\/li>\n\n\n\n<li>Grinding-tool access<\/li>\n\n\n\n<li>Stress around mounting bolts<\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\">Threaded ceramic holes require special consideration. Metal inserts or external clamping may provide a more durable solution for repeatedly assembled joints.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">Avoid Over-Constrained Mounting<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">A ceramic component can fracture or distort if it is rigidly constrained against a metal structure with a different thermal expansion.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Possible approaches include:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Kinematic mounting<\/li>\n\n\n\n<li>Compliant washers<\/li>\n\n\n\n<li>Controlled bolt torque<\/li>\n\n\n\n<li>Slotted holes<\/li>\n\n\n\n<li>Flexible metal interfaces<\/li>\n\n\n\n<li>Defined locating points<\/li>\n\n\n\n<li>Spring-loaded retention<\/li>\n<\/ul>\n\n\n\n<h2 class=\"wp-block-heading\">Separate Critical and Noncritical Tolerances<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">Applying extremely tight tolerances to every dimension increases cost and may create unnecessary manufacturing risk.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">The drawing should distinguish:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Wafer-contact surfaces<\/li>\n\n\n\n<li>Sealing surfaces<\/li>\n\n\n\n<li>Mounting datums<\/li>\n\n\n\n<li>Gas-flow features<\/li>\n\n\n\n<li>Plasma-facing dimensions<\/li>\n\n\n\n<li>General clearance dimensions<\/li>\n<\/ul>\n\n\n\n<h1 class=\"wp-block-heading\">Dimensional and Surface Specifications<\/h1>\n\n\n\n<p class=\"wp-block-paragraph\">A complete structural ceramic drawing may need to define:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Dimensions g\u00e9n\u00e9rales<\/li>\n\n\n\n<li>Plan\u00e9it\u00e9<\/li>\n\n\n\n<li>Parallelism<\/li>\n\n\n\n<li>Perpendicularity<\/li>\n\n\n\n<li>Position<\/li>\n\n\n\n<li>Runout<\/li>\n\n\n\n<li>Concentricity<\/li>\n\n\n\n<li>Surface profile<\/li>\n\n\n\n<li>Rugosit\u00e9 de la surface<\/li>\n\n\n\n<li>Edge radius<\/li>\n\n\n\n<li>Chamfer<\/li>\n\n\n\n<li>Maximum edge-chip size<\/li>\n\n\n\n<li>Datum structure<\/li>\n\n\n\n<li>Measurement temperature<\/li>\n\n\n\n<li>Inspection area<\/li>\n\n\n\n<li>Edge exclusion<\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\">Flatness should specify the controlled surface and whether the requirement applies:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>In the free state<\/li>\n\n\n\n<li>After mounting<\/li>\n\n\n\n<li>Under vacuum<\/li>\n\n\n\n<li>With a wafer loaded<\/li>\n\n\n\n<li>At room temperature<\/li>\n\n\n\n<li>At operating temperature<\/li>\n<\/ul>\n\n\n\n<h1 class=\"wp-block-heading\">Coatings and Surface Treatments<\/h1>\n\n\n\n<p class=\"wp-block-paragraph\">A coating can change the plasma, electrical, wear or contamination performance of a ceramic component.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Common functional treatments may include:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Yttria coatings<\/li>\n\n\n\n<li>CVD SiC coatings<\/li>\n\n\n\n<li>ESD-safe coatings<\/li>\n\n\n\n<li>Diamond-like carbon coatings<\/li>\n\n\n\n<li>Polished wafer-contact areas<\/li>\n\n\n\n<li>Metallized areas<\/li>\n\n\n\n<li>Brazed metal interfaces<\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\">Kyocera notes that functional coatings can be applied to ceramic handling arms to reduce wafer damage and contamination, while semiconductive ceramic coatings can provide static-control functionality on porous chuck surfaces.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Coating specifications should include:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Coating material<\/li>\n\n\n\n<li>\u00c9paisseur<\/li>\n\n\n\n<li>Coated surfaces<\/li>\n\n\n\n<li>Masked surfaces<\/li>\n\n\n\n<li>Adhesion requirement<\/li>\n\n\n\n<li>Rugosit\u00e9 de la surface<\/li>\n\n\n\n<li>Edge coverage<\/li>\n\n\n\n<li>Porosity<\/li>\n\n\n\n<li>Electrical properties<\/li>\n\n\n\n<li>Inspection method<\/li>\n\n\n\n<li>Allowable defects<\/li>\n<\/ul>\n\n\n\n<h1 class=\"wp-block-heading\">Inspection and Qualification<\/h1>\n\n\n\n<p class=\"wp-block-paragraph\">Structural ceramic components should be inspected according to their function.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">Contr\u00f4le dimensionnel<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">Possible methods include:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Coordinate measuring machine<\/li>\n\n\n\n<li>Optical measurement<\/li>\n\n\n\n<li>Laser scanning<\/li>\n\n\n\n<li>Air gauging<\/li>\n\n\n\n<li>Profile measurement<\/li>\n\n\n\n<li>Flatness interferometry<\/li>\n\n\n\n<li>Surface profilometry<\/li>\n<\/ul>\n\n\n\n<h2 class=\"wp-block-heading\">Material verification<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">Documentation may include:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Material certificate<\/li>\n\n\n\n<li>Ceramic grade<\/li>\n\n\n\n<li>Purity report<\/li>\n\n\n\n<li>Densit\u00e9<\/li>\n\n\n\n<li>Impurity analysis<\/li>\n\n\n\n<li>Electrical properties<\/li>\n\n\n\n<li>Thermal properties<\/li>\n\n\n\n<li>Batch traceability<\/li>\n<\/ul>\n\n\n\n<h2 class=\"wp-block-heading\">Surface inspection<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">Possible requirements include:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Rugosit\u00e9 de la surface<\/li>\n\n\n\n<li>Visual inspection<\/li>\n\n\n\n<li>Edge-chip limits<\/li>\n\n\n\n<li>Crack inspection<\/li>\n\n\n\n<li>Coating defects<\/li>\n\n\n\n<li>Pore uniformity<\/li>\n\n\n\n<li>Cleanliness inspection<\/li>\n<\/ul>\n\n\n\n<h2 class=\"wp-block-heading\">Functional testing<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">Depending on the component, testing may include:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Vacuum leakage<\/li>\n\n\n\n<li>Air permeability<\/li>\n\n\n\n<li>Heater resistance<\/li>\n\n\n\n<li>Uniformit\u00e9 de la temp\u00e9rature<\/li>\n\n\n\n<li>Dielectric strength<\/li>\n\n\n\n<li>Electrical resistivity<\/li>\n\n\n\n<li>Gas-flow uniformity<\/li>\n\n\n\n<li>Cyclage thermique<\/li>\n\n\n\n<li>Exposition du plasma<\/li>\n\n\n\n<li>Particle testing<\/li>\n\n\n\n<li>Load and deflection testing<\/li>\n<\/ul>\n\n\n\n<h1 class=\"wp-block-heading\">Common Material-Selection Mistakes<\/h1>\n\n\n\n<h2 class=\"wp-block-heading\">Selecting by Material Name Alone<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">\u201cAlumina,\u201d \u201cSiC\u201d or \u201cAlN\u201d is not a complete material specification.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">The grade, purity, manufacturing route and property limits must also be defined.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">Choosing the Highest-Purity Material Automatically<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">Higher purity can improve contamination and corrosion performance, but it may also increase cost and affect mechanical or manufacturing characteristics.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Purity should be matched to the component location and contamination risk.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">Ignoring Plasma Chemistry<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">Plasma resistance is chemistry-dependent.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">A material should be evaluated against the exact gases, power conditions, temperature and cleaning cycle.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">Specifying Extremely Tight Tolerances Everywhere<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">Unnecessary tolerances increase cost and lead time without improving equipment performance.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Critical datums and functional surfaces should receive the tightest control.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">Ignoring the Mounting Structure<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">A precise ceramic component can distort after assembly because of:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>An uneven metal base<\/li>\n\n\n\n<li>Excessive bolt torque<\/li>\n\n\n\n<li>Thermal-expansion mismatch<\/li>\n\n\n\n<li>Incorrect locating pins<\/li>\n\n\n\n<li>Particles under the mounting surface<\/li>\n<\/ul>\n\n\n\n<h2 class=\"wp-block-heading\">Treating Coated and Bulk Materials as Equivalent<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">A yttria-coated alumina component is not the same as bulk yttria.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">A CVD SiC-coated graphite part is not the same as free-standing CVD SiC or sintered SiC.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">The substrate and coating system must be specified together.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">Ignoring Cleaning and Packaging<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">A precision ceramic part can be contaminated after final machining if cleaning, drying and packaging are not controlled.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">The RFQ should define:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Cleaning method<\/li>\n\n\n\n<li>Final rinse<\/li>\n\n\n\n<li>Drying process<\/li>\n\n\n\n<li>Cleanroom packaging<\/li>\n\n\n\n<li>Bagging requirement<\/li>\n\n\n\n<li>Particle standard<\/li>\n\n\n\n<li>Handling restrictions<\/li>\n<\/ul>\n\n\n\n<h1 class=\"wp-block-heading\">RFQ Checklist for Semiconductor Structural Ceramic Components<\/h1>\n\n\n\n<h2 class=\"wp-block-heading\">Component information<\/h2>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Component name<\/li>\n\n\n\n<li>Equipment function<\/li>\n\n\n\n<li>Process step<\/li>\n\n\n\n<li>New design or replacement part<\/li>\n\n\n\n<li>Annual quantity<\/li>\n\n\n\n<li>Prototype quantity<\/li>\n\n\n\n<li>Target service life<\/li>\n<\/ul>\n\n\n\n<h2 class=\"wp-block-heading\">Drawing information<\/h2>\n\n\n\n<ul class=\"wp-block-list\">\n<li>2D drawing<\/li>\n\n\n\n<li>3D model<\/li>\n\n\n\n<li>Revision number<\/li>\n\n\n\n<li>Datum structure<\/li>\n\n\n\n<li>Dimensions critiques<\/li>\n\n\n\n<li>General tolerances<\/li>\n\n\n\n<li>Geometric tolerances<\/li>\n\n\n\n<li>Surface requirements<\/li>\n<\/ul>\n\n\n\n<h2 class=\"wp-block-heading\">Material information<\/h2>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Ceramic family<\/li>\n\n\n\n<li>Approved material grade<\/li>\n\n\n\n<li>La puret\u00e9<\/li>\n\n\n\n<li>Density requirement<\/li>\n\n\n\n<li>Electrical properties<\/li>\n\n\n\n<li>Thermal properties<\/li>\n\n\n\n<li>Plasma-resistance requirement<\/li>\n\n\n\n<li>Alternative materials permitted or prohibited<\/li>\n<\/ul>\n\n\n\n<h2 class=\"wp-block-heading\">Process environment<\/h2>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Temp\u00e9rature de fonctionnement<\/li>\n\n\n\n<li>Maximum temperature<\/li>\n\n\n\n<li>Heating and cooling rate<\/li>\n\n\n\n<li>Process gases<\/li>\n\n\n\n<li>Plasma chemistry<\/li>\n\n\n\n<li>RF or microwave exposure<\/li>\n\n\n\n<li>Vacuum level<\/li>\n\n\n\n<li>Cleaning chemistry<\/li>\n\n\n\n<li>Chemical concentration<\/li>\n\n\n\n<li>Exposure duration<\/li>\n<\/ul>\n\n\n\n<h2 class=\"wp-block-heading\">Mechanical requirements<\/h2>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Applied load<\/li>\n\n\n\n<li>Wafer weight<\/li>\n\n\n\n<li>Robot acceleration<\/li>\n\n\n\n<li>Vibration<\/li>\n\n\n\n<li>Mounting method<\/li>\n\n\n\n<li>Bolt torque<\/li>\n\n\n\n<li>Deflection limit<\/li>\n\n\n\n<li>Impact risk<\/li>\n\n\n\n<li>Thermal-cycle quantity<\/li>\n<\/ul>\n\n\n\n<h2 class=\"wp-block-heading\">Surface requirements<\/h2>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Rugosit\u00e9 de la surface<\/li>\n\n\n\n<li>Plan\u00e9it\u00e9<\/li>\n\n\n\n<li>Parallelism<\/li>\n\n\n\n<li>Wafer-contact area<\/li>\n\n\n\n<li>Plasma-facing area<\/li>\n\n\n\n<li>Sealing area<\/li>\n\n\n\n<li>Edge radius<\/li>\n\n\n\n<li>Chamfer<\/li>\n\n\n\n<li>Maximum allowable chip<\/li>\n\n\n\n<li>Polishing requirement<\/li>\n<\/ul>\n\n\n\n<h2 class=\"wp-block-heading\">Coating requirements<\/h2>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Coating material<\/li>\n\n\n\n<li>Coating thickness<\/li>\n\n\n\n<li>Coated surfaces<\/li>\n\n\n\n<li>Masking<\/li>\n\n\n\n<li>Adhesion<\/li>\n\n\n\n<li>Electrical properties<\/li>\n\n\n\n<li>Finition de la surface<\/li>\n\n\n\n<li>Allowable coating defects<\/li>\n<\/ul>\n\n\n\n<h2 class=\"wp-block-heading\">Cleanliness requirements<\/h2>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Maximum particle level<\/li>\n\n\n\n<li>Metallic impurity limits<\/li>\n\n\n\n<li>Cleaning procedure<\/li>\n\n\n\n<li>Cleanroom class<\/li>\n\n\n\n<li>Final rinse requirement<\/li>\n\n\n\n<li>Double bagging<\/li>\n\n\n\n<li>Vacuum packaging<\/li>\n\n\n\n<li>Handling restrictions<\/li>\n<\/ul>\n\n\n\n<h2 class=\"wp-block-heading\">Quality documentation<\/h2>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Material certificate<\/li>\n\n\n\n<li>Dimensional inspection report<\/li>\n\n\n\n<li>Surface roughness report<\/li>\n\n\n\n<li>Flatness report<\/li>\n\n\n\n<li>Purity report<\/li>\n\n\n\n<li>Coating report<\/li>\n\n\n\n<li>Electrical test<\/li>\n\n\n\n<li>Vacuum or flow test<\/li>\n\n\n\n<li>First article inspection<\/li>\n\n\n\n<li>Lot traceability<\/li>\n<\/ul>\n\n\n\n<h1 class=\"wp-block-heading\">Questions fr\u00e9quemment pos\u00e9es<\/h1>\n\n\n\n<h2 class=\"wp-block-heading\">Which ceramic is most commonly used in semiconductor equipment?<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">High-purity alumina is widely used because it provides a practical combination of electrical insulation, hardness, chemical resistance, manufacturing maturity and cost. More specialized materials are selected when higher thermal conductivity, plasma resistance, stiffness or fracture resistance is required.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">When should silicon carbide be selected instead of alumina?<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">SiC is often considered when the component requires higher specific stiffness, lower thermal expansion, higher thermal conductivity, wear resistance or high-temperature strength. The exact SiC grade must still be matched to purity, plasma and electrical requirements.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">What is the best ceramic for plasma resistance?<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">There is no universal best material for every plasma chemistry. Yttria, selected SiC materials and high-purity alumina systems are commonly considered, but performance must be evaluated under the actual process gas, power, temperature and cleaning conditions.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">Why is aluminum nitride used for ceramic heaters?<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">AlN combines electrical insulation with relatively high thermal conductivity, making it useful for components that must electrically isolate embedded conductors while distributing heat.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">Is zirconia suitable for large semiconductor stage components?<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">Zirconia can provide high strength and fracture toughness, but its relatively high density and lower stiffness make it less attractive for many large, lightweight precision structures. It is often better suited to small wear parts or mechanically sensitive features.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">What is the difference between CVD SiC and sintered SiC?<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">CVD SiC is produced through chemical vapor deposition and may be supplied as a free-standing part or coating. Sintered SiC is formed from ceramic powder and densified at high temperature. They can differ in purity, microstructure, porosity, available dimensions, cost and process compatibility.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">Does higher ceramic purity always mean lower particles?<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">Not necessarily. Particle performance also depends on plasma erosion, surface finish, edge quality, coating adhesion, cleaning and mechanical contact.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">Can ceramic components be reverse-engineered from samples?<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">Reverse engineering may be possible, but an existing sample may not reveal the exact material grade, internal stresses, purity, electrical properties or original tolerances. A sample should be combined with operating conditions and functional requirements.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">What files should be provided for a quotation?<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">A 2D drawing is essential for tolerances, datums and inspection requirements. A 3D model helps communicate complex geometry. Process conditions, material requirements, cleaning standards and annual quantities should also be supplied.<\/p>\n\n\n\n<h1 class=\"wp-block-heading\">Conclusion<\/h1>\n\n\n\n<p class=\"wp-block-paragraph\">Structural ceramics support nearly every major area of semiconductor manufacturing equipment, including wafer handling, vacuum chucking, plasma etching, deposition, thermal processing, heating, inspection and precision positioning.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Successful material selection requires more than choosing between alumina, silicon carbide or aluminum nitride.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">The component supplier and equipment designer must evaluate:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Mechanical load and stiffness<\/li>\n\n\n\n<li>Temp\u00e9rature de fonctionnement<\/li>\n\n\n\n<li>Dilatation thermique<\/li>\n\n\n\n<li>Plasma chemistry<\/li>\n\n\n\n<li>Exposition chimique<\/li>\n\n\n\n<li>Caract\u00e9ristiques \u00e9lectriques<\/li>\n\n\n\n<li>Wafer-contact conditions<\/li>\n\n\n\n<li>Particle limits<\/li>\n\n\n\n<li>Compatibilit\u00e9 avec le vide<\/li>\n\n\n\n<li>Finition de la surface<\/li>\n\n\n\n<li>Mounting design<\/li>\n\n\n\n<li>Cleaning and packaging<\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\">High-purity alumina provides a versatile starting point for many structural and insulating components. Silicon carbide is valuable for stiff, lightweight, thermally stable and high-temperature structures. Aluminum nitride supports thermal management with electrical insulation. Silicon nitride and zirconia can improve mechanical reliability in selected parts. Yttria is particularly important for plasma-facing surfaces, while cordierite can support thermally stable precision structures.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">The best result comes from selecting the ceramic grade, component geometry, coating, surface condition and inspection plan as a complete engineering system.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">SEO Information<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>SEO Title:<\/strong><br>Structural Ceramics for Semiconductor Manufacturing: Component and Material Selection<\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>Meta Description:<\/strong><br>Compare alumina, SiC, AlN, silicon nitride, zirconia and yttria for semiconductor ceramic components, including wafer chucks, focus rings, heaters and handling parts.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>Suggested URL:<\/strong><br><code>\/structural-ceramics-semiconductor-component-material-selection\/<\/code><\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>Primary Keyword:<\/strong><br>structural ceramics for semiconductor manufacturing<\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>Secondary Keywords:<\/strong><br>semiconductor ceramic components,advanced ceramics for semiconductor equipment,semiconductor structural ceramics,alumina semiconductor parts,silicon carbide ceramic components,AlN ceramic heater,plasma resistant ceramics,ceramic wafer chuck,ceramic focus ring,custom semiconductor ceramics<\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>TAGS:<\/strong><br>structural ceramics,semiconductor ceramic components,advanced ceramics,alumina ceramics,silicon carbide ceramics,aluminum nitride,silicon nitride,yttria ceramic,ceramic wafer chuck,focus ring,semiconductor equipment,custom ceramic parts<\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><\/p>","protected":false},"excerpt":{"rendered":"<p>Structural ceramics play a critical role in semiconductor manufacturing equipment because many process components must operate under conditions that are difficult for conventional metals and polymers. Depending on the process, equipment parts may be exposed to: Advanced ceramics are used in wafer handling, lithography, etching, deposition, thermal processing, cleaning, inspection, back grinding and other semiconductor [&hellip;]<\/p>\n","protected":false},"author":1,"featured_media":2456,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"site-sidebar-layout":"default","site-content-layout":"","ast-site-content-layout":"default","site-content-style":"default","site-sidebar-style":"default","ast-global-header-display":"","ast-banner-title-visibility":"","ast-main-header-display":"","ast-hfb-above-header-display":"","ast-hfb-below-header-display":"","ast-hfb-mobile-header-display":"","site-post-title":"","ast-breadcrumbs-content":"","ast-featured-img":"","footer-sml-layout":"","ast-disable-related-posts":"","theme-transparent-header-meta":"","adv-header-id-meta":"","stick-header-meta":"","header-above-stick-meta":"","header-main-stick-meta":"","header-below-stick-meta":"","astra-migrate-meta-layouts":"set","ast-page-background-enabled":"default","ast-page-background-meta":{"desktop":{"background-color":"","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"tablet":{"background-color":"","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"mobile":{"background-color":"","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""}},"ast-content-background-meta":{"desktop":{"background-color":"var(--ast-global-color-5)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"tablet":{"background-color":"var(--ast-global-color-5)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"mobile":{"background-color":"var(--ast-global-color-5)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""}},"footnotes":""},"categories":[3],"tags":[46,37,102,843,44,766,523,90,38,250,305,842],"class_list":["post-2455","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-industry-news","tag-advanced-ceramics","tag-alumina-ceramics","tag-aluminum-nitride","tag-ceramic-wafer-chuck","tag-custom-ceramic-parts","tag-focus-ring","tag-semiconductor-ceramic-components","tag-semiconductor-equipment","tag-silicon-carbide-ceramics","tag-silicon-nitride","tag-structural-ceramics","tag-yttria-ceramic"],"_links":{"self":[{"href":"https:\/\/www.xkh-ceramics.com\/fr\/wp-json\/wp\/v2\/posts\/2455","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.xkh-ceramics.com\/fr\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.xkh-ceramics.com\/fr\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.xkh-ceramics.com\/fr\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/www.xkh-ceramics.com\/fr\/wp-json\/wp\/v2\/comments?post=2455"}],"version-history":[{"count":1,"href":"https:\/\/www.xkh-ceramics.com\/fr\/wp-json\/wp\/v2\/posts\/2455\/revisions"}],"predecessor-version":[{"id":2457,"href":"https:\/\/www.xkh-ceramics.com\/fr\/wp-json\/wp\/v2\/posts\/2455\/revisions\/2457"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/www.xkh-ceramics.com\/fr\/wp-json\/wp\/v2\/media\/2456"}],"wp:attachment":[{"href":"https:\/\/www.xkh-ceramics.com\/fr\/wp-json\/wp\/v2\/media?parent=2455"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.xkh-ceramics.com\/fr\/wp-json\/wp\/v2\/categories?post=2455"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.xkh-ceramics.com\/fr\/wp-json\/wp\/v2\/tags?post=2455"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}