Electronics Forum | Thu Aug 05 11:37:24 EDT 2004 | Andrew
I was told by the customer to change the screw with washer to a screw without washer as the washer causing the overlay Lexan Material underneath the washer to bulge.What should I be looking at to make this change?Can I just use the same screw without
Electronics Forum | Thu Aug 05 13:48:37 EDT 2004 | davef
We'd guess. What does your customer say? If my customer gave me a written order to do something, I'd do it, unless he was wacked.
Electronics Forum | Thu Aug 05 20:24:58 EDT 2004 | Haran
The customer asked me to propose the type of screw and if possible the type that we are using for other products.With that proposal he will create documentation to make the changes.This customer always discuss with us for any improvement.
Electronics Forum | Thu Aug 05 17:21:48 EDT 2004 | russ
A stackup is basically this, if all parts (mating) are at the high end or low end of tolerances will they still fit together or meet any dimensional requirements as an assembly.
Electronics Forum | Thu Aug 05 11:42:58 EDT 2004 | Haran
What is the industry standard for Plating Thickness at via hole?What will be the problem if the thickness less than required spec.?
Electronics Forum | Thu Aug 05 13:51:18 EDT 2004 | davef
You need to have 1 thou of copper. If don't moisture absorbed by the board will out-gas through the plating.
Electronics Forum | Thu Aug 05 20:40:13 EDT 2004 | Haran
Is 1 thou of copper refer to 1 mil or 1 mm.?In Asia,we do not really use this unit.Please advise.
Electronics Forum | Thu Aug 05 20:42:11 EDT 2004 | Andrew
If the moisture does not has path to escape,what will happen to the entrapped moisture ,will there be a problem in the asssembly process?
Electronics Forum | Thu Aug 05 21:17:24 EDT 2004 | davef
A 'thou' is a 'mil'. It's intended use to to distinguish 'mil' from 'milli' [obviously with marginal success].
Electronics Forum | Thu Aug 05 21:20:40 EDT 2004 | davef
The entrapped moisture WILL escape. You just want to assure it is not through your PTH and via. Hopefully your board is constructed such that the alternate escape path for the moisture does not delaminate the board.
