Steve, that sure is an ugly looking mess! Worst I have ever see! I believe
your suspicions are correct either not properly cleaned or not dried or
maybe both. They should eat those!
Ron Dieselberg
BAE SYSTEMS
Cincinnati Electronics Corp

-----Original Message-----
From: Stephen R. Gregory [mailto:[log in to unmask]]
Sent: Wednesday, July 26, 2000 15:11
To: [log in to unmask]
Subject: [TN] "Bubbly Soldermask..."


Hi all!

We just got some boards in at receiving inspection that have thousands of
little "bubbles" in the soldermask all over the boards...they seem to
concentrate all along the edges of the features of the board. You can see
pictures of it at:

http://www.driveway.com/share?sid=e25a88c4.8e904&name=Pictures

One picture is bubblemask.jpg, the other is bubblemask2.jpg...what would
cause that? It's a LPI...don't know the brand name. I'm thinking that either
the boards weren't dry or cleaned well prior to soldermasking them. I'm
rejecting the boards of course...

My freedrive is filling up fast with all the pictures of the "pretty boards"
that we get from our vendors!!!

-Steve Gregory-

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