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| From [log in to unmask] Thu Aug 22 06: |
11:55 1996 |
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Does anyone have a working process utilizing peelable soldermask to
protect gold plated contacts during the hot air solder leveling?
We are a service shop and offer horizontal HASL as one of our
services. We currently use a HASL tape to protect the gold plate, but
we have come across a high voulme part number that has a routed slot
in the middle of the connector array. The slot extends past the
contacts and thus leaves a route for the solder to get under the tape.
This causes the tape to leak and solder to come in contact with the
gold plate causing a scrap defect.
I have tried sreenable soldermask in the past with some success. I
was never able to keep the registration tight enough to work on a part
such as this.
Any suggestions or leads to resources would be greatly appreciated.
Michael Holan
Process Engineer
Radian International
Electronics Div.
internet: [log in to unmask]
phone: 512/310-4209
fax: 512/388-0898
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