It's 500 nanometers, 350 nanometers, 280 nanometers.
Silicon carbide, is a kind of inorganic substance, chemical formula is SiC, is the quartz sand, petroleum coke (or coal coke), wood chips (the production of green silicon carbide need to add salt) and other raw materials through the resistance furnace high temperature smelting. Silicon carbide also exists in nature as a rare mineral, moissanite.
In C, N, B and other non-oxide high-tech refractory raw materials, silicon carbide is the most widely used, the most economical one, can be called gold steel sand or refractory sand. China's industrial production of silicon carbide is divided into black silicon carbide and green silicon carbide two, are hexagonal crystals, the specific gravity of 3.20 ~ 3.25, microhardness of 2840 ~ 3320kg\/mm2.
Silicon carbide chip is a new kind of semiconductor material, its lattice structure is different from the traditional silicon chip, has higher electron migration rate and better thermal stability.
Most of the silicon carbide chips currently on the market are based on the 65nm process, and some leading manufacturers have begun to experiment with more advanced processes to manufacture silicon carbide chips, such as 28nm and 16nm. With the continuous progress of technology and the increase of research and development investment, the manufacturing process of silicon carbide chips will be more refined in the future, and the chip performance will be further improved.