How is the wafer appearance caused? The performance of the chip half white, a class of black! Seek help！
You should be the color difference problem is caused by the mortar temperature cutting room temperature and workshop temperature also influenced to reduce this effect only from the cleaning rod to minimize the time spent between, this is the enthusiasm of the staff problem
If it is dry in the air, it should be prevented from drying before cutting!
You first check the silicon wafer TTV, as well as doping concentration distribution.
