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Subject:	Re: Plugging (not tenting) of via fab notes
From:	Franklin D Asbell <[log in to unmask]>
Reply To:	TechNet E-Mail Forum.
Date:	Mon, 30 Oct 2000 17:36:11 -0600
Content-Type:	text/plain
Parts/Attachments:	text/plain (46 lines)

It's a little confusing...but then I'm not the expert.

In regards to exposed vias...the artwork will dictate what vias are to
be exposed and/or plugged so the mention of that in the notes may
confuse the issue. Stating Green LPI IAW SM-840 should be enough in most
cases I would suspect. Your comment on 'associated vias'...what exactly
are 'associated vias? Is this all vias on a commen net?

Hope the critique helps some.

Franklin



Ken Patel wrote:
>
>         Fab Expert,
>         Is the following fab note make sense to you or should I also mention
> the plugging side as I do not want higher surface on fine-pitch side. Also,
> comment on use of SR1000 epoxy in my fab note.
>
>         SOLDERMASK: GREEN PHOTOIMAGEABLE, BOTH SIDES PER IPC-SM-840, CLASS
> 3. ALL TEST-VIAS AND ASSOCIATED PADS ARE TO BE FREE OF SOLDERMASK. ALL
> NON-TEST VIA HOLES TO BE PLUGGED WITH SR1000 OR EQUIVALENT EPOXY.
>
> re,
> ken patel
>
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