Industry expert Bob Willis uses the NPL Defect Database to explain pad cratering, drop test failure and suggested solutions for pads and alloys.
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IPC Tech Question Online 
2 Comments
Mr Willis, I would be very interested in knowing if you have examined or conducted any testing on Microsoft’s Xbox 360 GPU or CPU for defects.
Thank you.
Jim M
Yes to some degree and in fact we were very close to being featured on a BBC documentary about the problem of failed boards. However they did not like what we wanted to say. Not good TV fluff.
Bob