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January 1998

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Subject:
Re: IPC question
From:
HGross1029 <[log in to unmask]>
Reply To:
TechNet E-Mail Forum.
Date:
Tue, 27 Jan 1998 08:27:49 EST
Content-Type:
text/plain
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text/plain (19 lines) 
If you are specifying a phot imageable solder mask
then you may be seeing a thin coating which looks
like bare copper.  If you are using HAL then it may
be contaminated copper and the solder does not
adhere.  Need to know more about what your total
process is before a real determination can be made.

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