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August 2001

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Subject:
From:
Dee Stover <[log in to unmask]>
Reply To:
TechNet E-Mail Forum.
Date:
Fri, 24 Aug 2001 11:55:53 -0700
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Larry,

How about the water soluable liquid mask used to cover holes and parts that
aren't populated but are to be left free from solder.

Dee Stover  [log in to unmask]
Associate Technician Design
National Optical Astronomy Observatories



At 01:17 PM 8/24/01 -0500, you wrote:
>Many of our projects are multiple up boards in a panel. There are times
>when we only populate a partial panel and save the remaining boards for
>later runs. We use the local fiducials to show the pick and place
>machines which boards to populate. My question is, anyone have any ideas
>on what to use to hide the fiducials on the boards you don't want
>populated? On X'd out boards, we use a black marker, but that doesn't
>work on these as we need to use the fiducials at a later date. I thought
>about using a black label from the local office supply store, but I
>really want something that doesn't burn up in the reflow or leave a
>sticky residue.  Any suggestions?
>
>Thanks
>Larry Koens
>E.I. Microcircuits
>1651 Pohl Road
>Mankato, MN
>
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