The semiconductor industry is the highest-end application field of graphite materials, and semiconductor-grade ultra-high-purity graphite is known as the "clean carrier of chip manufacturing". Different from photovoltaic, metallurgical and aerospace graphite products, semiconductor graphite components pursue extreme purity, ultra-cleanliness and ultra-high dimensional stability, and any trace impurity, tiny particle pollution or dimensional deviation will lead to wafer scrapping and chip performance failure. With the rapid expansion of global 300mm and 450mm wafer fabs and the iterative upgrading of SiC and GaN wide-bandgap semiconductor technology, the market demand for high-standard semiconductor graphite products continues to grow, and the technical threshold of the industry is also constantly improving.
According to different semiconductor manufacturing links, semiconductor graphite products are divided into three core categories: wafer growth thermal field graphite components, semiconductor heat treatment annealing furnace graphite parts, and chip packaging and testing graphite fixtures. Each category has independent technical standards and processing difficulties, forming a differentiated high-end product system.
Wafer growth thermal field graphite components are used in monocrystalline silicon wafer and wide-bandgap semiconductor wafer growth furnaces, including graphite heaters, heat insulation systems, crucible supporting parts and conductive components. This type of product requires ultra-high purity with total impurity content below 5ppm, and metal volatile impurities are almost zero. In the high-temperature wafer growth environment above 1500℃, no harmful gas or particle pollution can be generated to ensure the atomic-level cleanliness of the wafer growth environment. At the same time, the thermal field components need to have ultra-uniform thermal conductivity and thermal stability to ensure consistent wafer growth quality and avoid wafer warpage and lattice defects caused by temperature fluctuation.
Semiconductor annealing furnace graphite components are mainly used for wafer ion implantation annealing, surface modification and stress relief treatment. Such graphite parts need to work stably in high-vacuum and high-purity inert gas environment for a long time, requiring ultra-low outgassing rate. Trace gas precipitation inside graphite will pollute the vacuum environment and affect the annealing accuracy of wafers. Therefore, annealing furnace graphite components need to undergo special high-temperature vacuum degassing treatment to eliminate internal adsorbed gas and volatile impurities, ensuring that the outgassing volume is controlled within the semiconductor industry standard range.
Chip packaging and testing graphite fixtures are precision functional components used for wafer cutting, packaging bearing and electrical performance testing. This type of product has extremely high requirements on dimensional precision, flatness and surface finish. The fixture needs to perfectly fit the tiny size of the chip wafer, with processing tolerance controlled within ±0.003mm, and the surface is ultra-smooth without burrs and micro-protrusions, avoiding scratch damage to the wafer surface. At the same time, the fixture needs to have stable anti-static performance to prevent static electricity from breaking down chip circuits.
The core processing technology of semiconductor graphite products lies in ultra-high purification and ultra-clean precision manufacturing. Different from ordinary graphite processing, semiconductor graphite production needs to be carried out in a dust-free purification workshop of class 1000 or above. All processing equipment is specially customized to avoid metal particle pollution generated by equipment friction. The raw materials need to undergo multi-stage high-temperature halogen purification and vacuum degassing treatment to remove trace impurities and adsorbed gases, achieving semiconductor-grade ultra-clean standards.
Huixian Jincheng Abrasive & Graphite Mold Factory has long been engaged in the customized manufacturing of semiconductor-grade ultra-high-purity graphite products, and has built a complete set of semiconductor graphite professional production and testing systems in line with international chip manufacturing standards. The company exclusively selects imported semiconductor special ultra-fine grain isostatic graphite blanks, and adopts four-stage high-temperature deep purification and multi-cycle vacuum degassing process to stably control the total impurity content of finished products below 5ppm and the ultra-low outgassing rate, fully meeting the ultra-clean manufacturing requirements of semiconductor wafers.
In terms of precision processing, Jincheng Graphite completes all processing procedures in a professional dust-free purification workshop, and uses special non-metallic processing tools to avoid metal pollution. Equipped with ultra-precision CNC processing and nano-level polishing equipment, the company can realize micron-level ultra-precision manufacturing of semiconductor thermal field components and fixture parts, with the flatness and dimensional tolerance of finished products fully compliant with international semiconductor equipment standards. The company's self-developed anti-static surface treatment technology can effectively improve the static resistance of graphite fixtures and protect chip wafers from static damage.
At present, Jincheng Graphite's semiconductor-grade graphite products cover full-series wafer thermal field components, annealing furnace graphite parts and packaging testing fixtures, which are widely matched with global mainstream semiconductor wafer manufacturing equipment. The products are exported to many semiconductor manufacturing bases in Asia, Europe and North America, providing ultra-high-purity and ultra-precise core material support for global chip manufacturing and wide-bandgap semiconductor industrial upgrading.
With the continuous development of advanced semiconductor manufacturing technology, the cleanliness and precision standards of semiconductor graphite products will be further improved. Jincheng Graphite will continue to upgrade purification technology and ultra-clean processing system, continuously optimize semiconductor graphite product performance, and help the global semiconductor industry achieve high-quality iterative development.
