Steve,

Had to use the reply system as I lost email service and all my messages
since Saturday. I'm writing because I saw you success concerning blistering.
What probably happened is you finished your supplier's cure process during
relamination, or corrected some other serious problem.

When blisters are the size you described, there are very serious problems
associated. You can't bake them out and have a qualilty product. You will
have future failures, or will your customer.

Have someone run TMA on a specimen out of the bag. A material supplier can
do that free.

Earl Moon
----- Original Message -----
From: Stephen R. Gregory <[log in to unmask]>
To: <[log in to unmask]>
Sent: Saturday, August 28, 1999 7:37 AM
Subject: [TN] Blisters or Delamination after Wave...


> Hi ya'll!
>
> Well, I'm in onna Saturday...(Months end, you know how that goes!). Just
> finished waving a small lot of boards (9 assemblies) and 5 of them came
off
> the wave with these dime to quarter-sized delaminated blisters, maybe 3-4
of
> them on each board, and the other 4 boards looked fine! What would cause
> that? Entrapped moisture? The boards were supposedly baked before wave (At
> least the traveler said they were). Any ideas?
>
> -Steve Gregory-
>
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