Electronics Forum: 5.22 1.2 0

Substrate Au/Ni thickness

Electronics Forum | Tue Feb 20 07:31:45 EST 2001 | Nick L

0.076 ~ 0.2 um(micron) but our substrate gold thickness is between 0.3~1.2um. Is there any related to the plating process of substrate! And how can they control this thickness?(May be I should ask substrate vendor their controlling limit). If this i

MYDATA Myspeed software is total junk

Electronics Forum | Thu Jan 13 23:31:19 EST 2005 | KEN

Many of the Engineers from Dynapert / Precima went to Philips EMT. You can see many simlarities in feeder and nozzle designs. They (Philips) have a signifficant history in the P&P arena. I have 3 GEM emeralds from 1998 that continue to calibrate at

printing speed - paste vs. glue

Electronics Forum | Fri Oct 09 06:32:38 EDT 2009 | davef

Here's what is on that post referred to, not sure what you need more than ... "* Stencil material: metal or plastic, no difference in print, metal is easier to clean, no static problem, available * Stencil thickness: Chips 0.006", SOIC 0.010" [print

wave soldering and solder bridge

Electronics Forum | Mon Dec 17 12:06:58 EST 2007 | pjc

5 Steps to Eliminate Bridges: 1. Establish (wave) Parallelism First and foremost, you must establish board-to-wave parallelism. This is the prerequisite to any wave solder process control. For an understanding of the power of this approach go to ht

Gold Surface Finish on PCB's

Electronics Forum | Thu Dec 08 07:55:16 EST 2005 | davef

Your understanding of the situation is correct. In both cases, you solder to the nickel. The gold [Au] protects the nickel from oxidation. When soldering, the gold moves into solution in the solder and forms an intermetallic compound [IMC] with th

0402 stencil design

Electronics Forum | Tue Feb 04 22:28:16 EST 2003 | davef

You could reduce the paste by about 70%. Solder balling and tombstoning will be the issues to fight. The drivers to these don't change with the component size. Use the fine SMTnet Archives for background. Aperture Size and Thickness of Solder Pas

Re: Need advise on regarding Vias

Electronics Forum | Tue Dec 14 22:17:33 EST 1999 | Dave F

Armin: How ya doin� bud? CK gives good advice, but I'd like to take a bit of a different angle. Q1. For 0.7 mm (0.027in) diameter hole for vias, what�s the minimum annular ring for this hole diameter? Depends on what you�re trying to do. For in

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