I want to tell confidently that latch-up is not the cause for "Unknown" damaged chip. I want to know "Unknown" damaged chip is damaged by some cause, not latch-up.
But I have no evidence for some other people.
But I don't know How to distinguish each other latch-up sample & unknown damaged sample.
If some chip is damaged by latch-up, how do I know that? through physical analysis? or any other way?
First of all, I'll prepare to physical analysize (de-layer). I wish this method let me know the difference between latchup sample and not-latchup sample.
thanks.