Electronics Forum: pwb (Page 10 of 44)

Re: Bare PWB bake out during circuit assembly

Electronics Forum | Wed Nov 10 09:42:05 EST 1999 | Boca

Generic fabs should not require baking. Some special cases like teflon and flex circuits take moisture very well, they often continue to require a trip to the oven. Best wishes, Boca

PWB marking

Electronics Forum | Thu May 27 13:49:01 EDT 1999 | Greg Curler

One of our board fab houses is asking (again) to eliminate the reference designators and polarity markings from boards. This isn't feasible for thru-hole, but what is the industry trend on surface mount assemblies?

1 mil or 25 um trace width

Electronics Forum | Thu Apr 29 01:49:10 EDT 1999 | Daniel J.M. Guibord

Can anyone in this world produce such small PCB/PWB trace widths? Lots of theory so far, but have not found anyone yet who can do it in practice.

Re: 1 mil or 25 um trace width

Electronics Forum | Thu Apr 29 09:37:12 EDT 1999 | Dave F

| Can anyone in this world produce such small PCB/PWB trace widths? Lots of theory so far, but have not found anyone yet who can do it in practice. | Daniel: 2 mil lines with 3 mil spaces are pretty technical. Good luck. Dave F

PWB plating

Electronics Forum | Wed Feb 03 06:35:14 EST 1999 | Teemu M�kiniemi

Hi! Does anyone know any roadmaps for board plating materials. Especially I'm interested in finishes, which are plated onto copper. Teemu M�kiniemi

PWB circuit changes/ECO adds

Electronics Forum | Tue Dec 15 12:25:05 EST 1998 | Don Beardsley

Trying to locate a company that I believe was called Addative Technologies, previously located in Tyngsboro, Ma. Process is the addition of circuit traces utilizing a conductive ink that is fired and can then be run through the normal processing cyc

Flexible Circuit, rework

Electronics Forum | Tue Sep 22 14:33:47 EDT 1998 | David Brooks

I am looking for a way to re-bond a flexible circuit to a PWB, so that the original circuits are re-connected. Can anyone help? I believe I saw some equipment in SMT Magazine 1 or 2 months ago, but I can not find that advertisement!

Integrating fabrication & assembly

Electronics Forum | Tue Jul 21 17:15:53 EDT 1998 | Cy Holmes

Anyone know of reasons why PWB fabrication and board assembly shouldn't take place in the same building? eg contamination? corrosion? etc

BGA solder joint integrity

Electronics Forum | Tue Jan 15 12:20:16 EST 2002 | cfraser

This sounds like it could possibly be a case of Black Pad. We have had a few issuses with this in the past as well. Who the PWB vendor? I also recommend searching the archives and doing some solder samples with nonpopulated boards

ALIVH pcb

Electronics Forum | Tue Apr 09 18:29:34 EDT 2002 | davef

Any-Layer Interstitial Via Hole (ALIVH). In printed circuit board fabrication, a registered mark of Matsushita Electric for a filled microvia structure in all layers for applications requiring small-size, lightweight build-up PWB to achieve high-den


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