The top five global semiconductor silicon wafers have a more cautious approach to the super-cycle of silicon wafers. The current business objectives are based on profit maximization, followed by market share maintenance or product portfolio. Optimize and other goals. In addition, due to the current delivery time of equipment for producing silicon wafers, the supply of 12-inch silicon wafers is expected to increase by only 3 to 5% in 2018, while the demand for 12-inch semiconductor silicon wafers is expected. The end is expected to increase by 5 to 7% per year, so the supply and demand gap for 12-inch silicon wafers this year will be larger than 2017.