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June 2005

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Subject:
From:
Ryan Grant <[log in to unmask]>
Reply To:
TechNet E-Mail Forum <[log in to unmask]>, [log in to unmask]
Date:
Tue, 14 Jun 2005 10:56:59 -0600
Content-Type:
text/plain
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text/plain (92 lines)
Your supplier can fix it.  Order them to step in line now, or it will
never go away... 

BTW, go easy on the soldermask scratches unless you really want the
soldermask repaired.  Granted, it stinks having scratches in the
soldermask, but solder mask repair means that SOMEWHERE, that goop is
going to end up your SMT pads.  You'll find out about it after you put a
bunch of components on the board and solder them down.  Given the choice
of two evils, I pick the scratch instead of mask repair.

Ryan

-----Original Message-----
From: TechNet [mailto:[log in to unmask]] On Behalf Of ekalgren
Sent: Tuesday, June 14, 2005 9:54 AM
To: [log in to unmask]
Subject: [TN] PCB rejection criteria

Good morning everyone,



I've got a question on bare PCB's.  These are relatively simple boards
that
have been red flagged in incoming inspection for having scratches in the
soldermask that expose the underlying copper.  Now, even I know that
this is
truly a defect.  QA has also written up the entire lot of boards for
being
dusty and a couple of the lot for having "excess solder."  The excess
solder
is just a couple of PTH's that are partially filled by the HASL.  I'm
not
sure what the dust is but it blows off easily and doesn't seem to be
affecting anything other than the inspector's sense of cleanliness.



My question to all of you out there is: how should I handle the dust
issue?
Is this typical of boards coming in from the shop and should I tell the
inspectors to go easier in the future or do I demand spotless, dust free
boards from our supplier?  I don't want to accept junk but at the same
time
I don't want to drive costs up by over inspecting. Where does one draw
the
line?



Thanks in advance,



Eric Kalgren

Manufacturing Engineer

Continental Tool and Microwave Company

[log in to unmask]




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