Electronic-grade polysilicon is the core raw material for the upstream of the integrated circuit industry. The ambitious development plan of the Chinese government and investment by major companies in large-scale silicon projects will drive the development of electronic-grade silicon materials. The country's 'strong base engineering' and integrated circuit industries China Silicon High-tech and Jiangsu Xinhua supported by investment funds (large funds) are developing electronic grade polysilicon research and industrialization, adopting new technologies, designs, construction concepts and system equipment, and have already started production in small batches and trials and certifications by users. In addition, there are also small-volume supply news. In addition, there are domestic Yellow River hydropower, Yunye core materials and other companies have also released the news of electronic-grade polysilicon production. Accompanied by these several polysilicon trial production, trial and verification, China Electronics Grade polysilicon will gradually achieve mass production, stable production and wide application. With reference to the quality and cost-reduction development base of the solar energy industry, with the accumulation of electronic-grade polysilicon quality and cost control experience, the market share of China's electronic-grade polysilicon will gradually increase. Afterwards, the market competition will fundamentally change, and China’s electronic-grade polysilicon exports will also .
Compared with solar grade polysilicon, the difficulty of electronic-grade polysilicon is to establish a high-purity concept, establish a high-purity environment and production system, and establish an implementable and controllable quality assurance system. The so-called establishment of a high-purity concept begins with a technical solution and requires the implementation of a high-purity concept. , According to different process links, set the corresponding high-purity environmental requirements, equipment material requirements, construction and installation requirements, including raw material quality control, equipment, pipelines, valve equipment quality control, equipment system clean installation quality control, system before production Clean processing and operation preparation, etc.
The quality control of raw materials for the system, including the quality of key raw materials such as trichlorosilane, hydrogen, silane, silicon core or seed crystals, supporting pure water, nitrogen, argon, various high-purity chemical reagents, etc.
Important process control, including raw material purification and transportation, polysilicon production, silicon rod (granular silicon) harvesting, transportation, silicon rod crushing, corrosion cleaning, dry packaging, etc.. According to the requirements of the production process, control the cleanliness of the ambient air, strengthen the mechanization, automation Operation, reduce human contamination.
According to the polysilicon quality control requirements, establish a polysilicon quality control system, including the purity and control requirements of raw materials entering the reduction furnace; refine the reduction process, standardize the operation; establish a quality control system and quality early warning system according to the product quality target requirements, control the process materials and operating.