Mike: Why not tape them to a back-up board for support and fixturing?

There are vacuum tables out there; we used to use Autoroll 360's with
vacuum. You can also make your own by drilling holes in the table top board
support and attaching a vacuum pump.

Be careful when you are baking to cure this "thermal mask" on these boards
it could also give you problems.

Good Luck!


Regards

Michael Barmuta

Staff Engineer

Fluke Corp.

Everett WA

425-446-6076


-----Original Message-----
From: Michael Lester [mailto:[log in to unmask]]
Sent: Friday, June 08, 2001 3:01 PM
To: [log in to unmask]
Subject: [TN] solder mask tables


Happy Friday...and in Northern Ohio USA- welcome Mr. or Mrs. Sun!!
We have just practiced processing .014 Pyralux pc bds.  All went well until
we had to solder mask the boards.  We use a hand screened thermal cured
mask.
 The boards are impossible because of warp factor.  Does anyone out there
know of  a screening table with a vacuum to hold the boards in place for
hand
screening?
Thanks.
Mike

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