> > 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 \ / \ / > ===============================(_)=(_)============================ > >