200mm wafer has been playing an important role in the field of power electronics，discrete devices，micro-electromechanical systems and other chip manufacturing area. With the rapid development of the Internet of Things，5G，mobile interconnection，automotive electronics and other fields，200 mm wafers show great prospects due to their more cost advantages，and their demand exceeds the supply capacity. Chip manufacturers and equipment manufacturers are trying to increase their production capacity and new thinking about their development direction.