We found about 42.3% (22/52*100%=42.3%) defects in the process of making the sample test. The phenomenon is that the IC is short-circuited. We used X-Ray to compare and check the IC body and internal structure and found no abnormality. Comparison The screen printing of the IC body is CGW in line with the requirements of the specification, but some Markings in the same roll are clearly displayed, and some are blurred. We don't know what's problem,so please help analyze what caused.