Advanced semiconductor chip manufacturing relies on a series of ultra-high-temperature and ultra-clean thermal processes, and high-purity graphite components are the core hot zone carriers of all thermal processing equipment. Different from traditional industrial graphite, semiconductor-grade graphite takes ultra-high purity, ultra-low particle shedding, ultra-precise dimensional stability and ultra-clean surface as the core evaluation indicators. With the continuous advancement of global semiconductor process nodes from 14nm to 7nm, 5nm and 2nm, the purity and precision requirements of graphite components have been raised to an unprecedented level, becoming a key basic material restricting the yield of advanced chips.
Semiconductor graphite components cover the whole industrial chain of wafer manufacturing, including monocrystalline silicon growth furnace thermal field parts, SiC wide-bandgap semiconductor growth graphite components, wafer annealing furnace graphite carriers, diffusion furnace graphite heating components, and epitaxial equipment graphite susceptor substrates. Each process scenario has exclusive technical standards: silicon crystal growth graphite requires ultra-low metal impurities to avoid wafer contamination; SiC growth graphite needs to withstand ultra-high temperature above 2200°C with stable structure; annealing and diffusion graphite components require ultra-flat surface and zero particle shedding to ensure wafer surface cleanliness.
Ultra-high purity control is the biggest technical barrier of semiconductor graphite. Advanced process nodes require graphite ash content below 1ppm, and trace transition metal impurities such as iron, copper, nickel and chromium need to be controlled at ppb level. These trace impurities will diffuse into the wafer at high temperature, forming leakage channels and defect points, resulting in chip performance degradation and yield collapse. Therefore, semiconductor graphite must undergo multiple high-temperature halogen purification and vacuum degassing treatment to completely remove internal volatile substances and metal impurities, which is a purification process that ordinary industrial graphite does not have.
Precision machining and surface treatment are another core advantage of semiconductor graphite. Wafer-level graphite components need micron-level dimensional tolerance and nanometer-level surface roughness. Thin-walled and grooved structural parts used for wafer bearing and gas flow guiding require zero burrs and zero micro-cracks. At the same time, most semiconductor graphite components need to be coated with SiC or pyrolytic carbon. The flatness, compactness and surface uniformity of graphite substrates directly determine the coating adhesion and service life, and unqualified substrates will lead to coating peeling and process failure.
Thermal stability and uniformity are also key indicators of semiconductor graphite. The low thermal expansion coefficient of high-quality isostatic graphite ensures that components will not deform or shift during repeated high-temperature thermal cycles, maintaining the consistency of wafer processing temperature field and gas field. For 300mm and 450mm large-diameter wafer equipment, integrated monolithic graphite components replace spliced parts, eliminating process errors caused by assembly gaps and ensuring ultra-uniform processing environment for large-size wafers.
Huixian Jincheng Abrasive & Graphite Mold Factory has long been committed to the precision processing and customized manufacturing of semiconductor-grade high-purity graphite components, supporting the domestic and global semiconductor equipment supply chain upgrading. Founded in 1984, the company masters the full-process processing technology of semiconductor graphite substrates, including high-purity blank screening, precision CNC machining, ultra-clean surface polishing, vacuum degassing and pre-coating pretreatment. The factory adopts imported ultra-high-purity isostatic graphite raw materials, and strictly implements semiconductor-level purification and impurity removal processes to ensure that all finished components meet the purity standards of advanced chip process nodes.
Equipped with professional ultra-precision machining and polishing equipment, Jincheng Graphite can process complex graphite susceptor blanks, thermal shielding components, heating elements and wafer carrier fixtures for semiconductor diffusion, annealing, epitaxy and crystal growth equipment. The company strictly controls machining tolerance and surface roughness, eliminates processing burrs and micro-defects, and provides high-quality matching substrates for subsequent SiC and PyC coating. All products undergo strict CMM dimensional detection, surface defect screening and impurity content analysis to ensure zero-defect delivery.
Different from standardized industrial graphite, Jincheng Graphite provides personalized process matching solutions according to different semiconductor equipment models and process nodes. The technical team cooperates with semiconductor equipment manufacturers to optimize component structure and surface treatment process, improving the thermal uniformity and anti-pollution performance of graphite components. With the accelerated localization of global semiconductor equipment, high-quality domestic precision graphite processing capacity has become an important link in the supply chain. Jincheng Graphite relies on stable quality and professional customization capabilities to provide reliable core component support for advanced semiconductor manufacturing.
