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1995

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<[log in to unmask]> <miso!itt.com!jaholm>
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From [log in to unmask] Sat Apr 27 15:
06:18 1996
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Jack Holm <[log in to unmask]>
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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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