Date   : Thu, 08 Mar 1984 14:20:37 cst
From   : vomlehn@ut-ngp.ARPA
Subject: Using cold-in-a-can products to isolate faults

You should be careful when using one of those cold-in-a-can products
to isolate heat-sensitive chips.  Apparently someone took a look at
these things and discovered that suddenly cooling down a hot chip can
cause it to fail.  This is not entirely suprising when you consider what
happens when you put a hot glass jar into cold water; it cracks.  I
don't know if this person came up with actual figures for these cold-
induced failures, but if you notice your board fails in a different way
after cooling down a chip it may be that you now have TWO defective chips.