if you aren't  repairing the damaged soldermask because it's in a non-critical area, you should check to make sure the damage didn't dig into the laminate and expose fibers.

-----Original Message-----
From: TechNet [mailto:[log in to unmask]]On Behalf Of Genny Gibbard
Sent: Wednesday, September 22, 2004 11:00 AM
To: [log in to unmask]
Subject: Re: [TN] Soldermask repair


All right, that tells how to do a repair, but I was wondering whether it was
even necessary to do the repair in areas only involving laminate exposure.
However, I think I may have found the answer in IPC-A-610, 9.2.2.  It says
something to the effect that blisters, voids or scratches in solder resist
that do not bridge adjacent conductors are acceptable.

So I think if a soldering or assembly operation accidentally scratches a bit
of soldermask off, but no copper is exposed or damaged in the area, it is ok
to leave it unrepaired.  Is this an acceptable interpretation?

-----Original Message-----
From: [log in to unmask] [mailto:[log in to unmask]]
Sent: September 22, 2004 11:22 AM
To: [log in to unmask]; [log in to unmask]
Subject: RE: [TN] Soldermask repair


whoops, lazy fingers. it's 2.4.1

-----Original Message-----
From: TechNet [mailto:[log in to unmask]]On Behalf Of Genny Gibbard
Sent: Wednesday, September 22, 2004 10:08 AM
To: [log in to unmask]
Subject: [TN] Soldermask repair


All right, here's my first question for you gurus...
Is there an IPC guideline regarding repairing soldermask that may have been
removed from a PCB in an area that has only laminate being exposed?
I guess we are currently repairing soldermask even when no copper has been
exposed.
Would there be any reason to consider continuing to do this?

Thanks.

Genny

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