At present , China's semiconductor silicon materials industry can only meet the domestic enterprises to 4-6 inches and 4-6 inch silicon wafer heavily doped epitaxial silicon substrate sheet to meet domestic demand as well as some corporate demand for high impedance polished silicon ( polysilicon prices due reasons ) , the required domestic enterprises 8 inches and 12-inch wafer most imported. Global 8 inch and 12 -inch silicon wafers mainly by Germany Siltronic ( Siltronic Corporation ) , Japan's Shin-Etsu and SUMCO, MEMC four major American manufacturer of silicon material production, these large companies have a large market share and a strong technological advantage. The gap between China 's advanced level of production of semiconductor silicon materials industry production levels and large international companies , mainly in the domestic market enterprises 4-6 inch wafers aspects , and in 8 inches and 12 inches market, domestic enterprises have made ​​a lot of effort has not achieved the desired results . One side is the fast-growing market 8 inches and 12 inches , the other side is the domestic enterprise market share is almost zero , the contrast between the two is enormous . Our enterprise level and integrated circuit manufacturing technology gap between production capacity and advanced international business has been getting smaller and smaller , in the huge market demand , driven by China will have more 12-inch production line put into operation, the world will have more 8-inch production lines to China, which is a technical upgrade of semiconductor silicon materials industry and then prepare a huge market . With international companies to integrated circuits produced by 8 inches 12 inches transfer , global trends emerged from eight -inch IC production lines transferred to the discrete devices , our silicon materials enterprises in six inches or less discrete devices with silicon substrate and epitaxial wafers tablets production has enough experience , eight inches heavily doped silicon wafer polishing a substrate sheet and production of silicon materials industry will be 8 inches wafers into the market more favorable . Our enterprise level and integrated circuit manufacturing technology gap between production capacity and advanced international business has been getting smaller and smaller , in the huge market demand , driven by China will have more 12-inch production line put into operation, the world will have more 8-inch production lines to China, which is a technical upgrade of semiconductor silicon materials industry and then prepare a huge market .