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Date: | Wed, 13 Nov 96 10:34:12 cst |
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When I was a soldermask rep, one of my customers bought some
clear LPI soldermask from me to cover up his fiducials. He
and his customers were very pleased with the result because
they could clearly see the fiducials and the fiducials did
not cover with solder during HASL.
MacDermid had the clear LPI soldermask.
Dave Sullivan ([log in to unmask])
______________________________ Reply Separator _________________________________
Subject: Re: ASSY: Polishing Fiducials
Author: [log in to unmask] at ccmgw1
Date: 11/12/96 6:29 PM
> > >.Gold or OSP finsihes generally do not require
> > > this operation.
> > >
> > >From the What Will They Think Of Next (WWTTON) dept:
>
> > Another request we`ve had in this light (sic) is to leave
> > the fiducials as bare copper, allowed to oxidize. Brings
> > an OSP-look to a HASL PWB.
>
> fabbers now have to cover the fiducial <somehow> at HASL. We do have
> the means, but go explain that to the guy(s) placing dots all over
Yessiree. Didn't mean to endorse the What They Thought Of...
I think (hope) we were at least kind enough to provide a mask
artwork in the event a photo- or screen printed method could
be devised.
Regards to all,
--
Jeff Seeger Applied CAD Knowledge Inc
Chief Technical Officer Tyngsboro, MA 01879
[log in to unmask] 508 649 9800
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