DESIGNERCOUNCIL Archives

May 1998

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Subject:
Re: Pass the Knowledge
From:
"Olson, Jack C" <[log in to unmask]>
Reply To:
DesignerCouncil E-Mail Forum.
Date:
Wed, 20 May 1998 13:38:02 -0700
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text/plain (29 lines) 
I have never heard that the reason for tenting vias is to prevent shorts.

We tented them:
1) to make more room for silkscreen/legend
2) for better vacuum fixturing to the ICT tester


> -----Original Message-----
> From: Scott Buscomb [SMTP:[log in to unmask]]
>
> I am still not sure why vias need to be plugged and/or tented. If an LPI
> covers the via annular
> ring enough to prevent shorts without tenting the hole (mask is drawn into
> the hole), why is it
> important that the mask covers the hole? Someone please enlighten me.
>

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