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Date: | Wed, 18 Oct 95 8:04:09 CDT |
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> > The design guides for MIL-STD-275 and IPC-D-275 require non-functional pads
> > on all layers of a multilayer PWB. Can manufacturers remove them an their
> > judgment?
> >
> > If anyone knows the verse and script, that would be great.
> >
> > Thank you in advance,
> > Kevin Thorson
> > Loral Defense Systems - Eagan
> >
> >
> I would be very upset if our manufacturer removed the non-functional pads
> from our supplied data. (or if they did any other other adjustment outside
> of the expected "process modifications"). I question how incomeing QA would
> accept them. And how much they were paying the Source Inspector to overlook
> this change.
>
> We work closely with our vendor, while we may selectivly remove some
> non-functional pads from our artwork if spacing is an issue, we do not
> globally remove the non-functional pads. The via sizes in use today
> are small enough that layer to layer registration must be tight.
>
> The advantages of keeping this pad far out-weigh the minor advantage of
> deleteing this from your artwork.
(see some of the other responces good stuff)
>
>
> '''
> (O O)
> ============================oOO==(_)==OOo=========================
> Jack Holm \_/ \_/
> PC Design "System Weenie" / jah \ Phone (219) 487-6199
> ITT Aerospace/Communications (_________) Fax (219) 487-6033
> 1919 W. Cook Road \ _ / E-Mail [log in to unmask]
> Fort Wayne IN. 46801 \ / \ /
> ===============================(_)=(_)============================
>
>
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