Today I tested 5 HDIs: 3001, 3002, 3003, 3004 and 4033
Results:
3001
- electrically OK
- HV OK
- I heard 10+ sparks during 60sec
--> HDI did not pass tests
Danek took it for HV test at his setup
3002-3004, 4033
- all showed different patterns of electrical test failures in Quadrant 0 and 3 (Q0, Q3)
- either all 3 (clock, CTR, SDA) tests fails on Q0 and/or Q3 or some of them or only Ch1 (out of two channels) fails.
--> HDIs did not pass tests
Since patterns were similar the reason could be miss-alignment of contacts. Under microscope in some cases one could see marks outside contact pads.
Conclusion:
we have to re-align the pin head of the jig with respect to HDI and repeat tests of HDIs: 3002-3004 and 4033. |