-----Original Message-----
From: Newland, Scott [mailto:[log in to unmask]]
Sent: Monday, November 29, 2004 10:56 AM
To: [log in to unmask]
Subject: [TN] Die Penetrant SJ Crack Inspection Process


I'm going to be performing some long duration thermal cycling testing on some
CGA components that will not be electronically monitored for opens.  This is not
my preferred approach, but a reasonable daisy chain test component was not
available.  My current plan is to periodically remove parts and cross section
the outside rows.  I also wanted to try using die penetrant to inspect for SJ
cracks.  As I understand the process you flooding the SJ under the part with Die
penetrant, clean, then pull the parts off vertically, and inspect for
pre-existing cracks marked by the die.

Is the die penetrant inspection worth while?  Does anyone have or know of a
written procedure for using die penetrant to inspect for SJ cracks?  Any other
suggestions for identifying the "needle in the hay stack" cracks?

Scott Newland
Harris GSCD
321 727 6472
Pager  321 690 4131
E-Mail [log in to unmask]
For a brain teaser try:
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