Electronics Forum: pass (Page 135 of 142)

BCC Technology --- Placement, Rework, Reflow

Electronics Forum | Thu Apr 04 05:33:19 EST 2002 | ianchan

Hi, hope this helps : 1) BCC (bump chip carrier) production for us, was with a 5mils Stencil. The outer perimeter smallish pads are not much of a problems. For the central large pad, we split the paste print (corresponds to the Stencil apperture op

Help SMTnet with new feature

Electronics Forum | Mon Apr 22 14:21:50 EDT 2002 | bdoyle

Hello Everyone! I'm sure everybody is curious about what we're up to every day. Well in an effort to improve the site for all of our users we're currently working on a pretty big feature. This feature comes as an answer to the countless emails we

IONIC CLEANLINESS SPEC FOR BARE PWBs

Electronics Forum | Sun May 09 16:25:00 EDT 2004 | gabriele

Military and most commercial standards requires > post-soldered boards to measure less than 10 > �g/in of NaCl (14 when using an Omegameter, 20 > on a Ionagraph, and 37 on a Zero-Ion). > > As Dave > stated, 6.5 �g/in of NaCl is called out in >

SMT EQUIPMENT FOR LOW VOLUME HIGH MIX

Electronics Forum | Tue Apr 29 14:13:52 EDT 2003 | stefwitt

My opinion to hold on to your machines was based on the current market situation. First of all, I don�t believe that a customer with ten boards will go to China for prototype production. Truth is, that the remaining market here is the prototyping mar

Lead Free Solder Wick

Electronics Forum | Fri Mar 10 00:17:47 EST 2006 | Samir

Patrick, My sardonic wit comes from 11 years of being an embattled process guy who�s basically �seen it all� in electronics manufacturing. I�ve been witness to the �Seagull Managers�, uneducated managers lacking credentials, managers with MBAs but

Soft Water Versus Deionized

Electronics Forum | Sat Jan 27 08:45:43 EST 2007 | davef

[clipped] Chemistry of Hard and Soft Water From Anne Marie Helmenstine, Ph.D., Your Guide to Chemistry. Water Works I'm sure you've heard the terms 'hard water' and 'soft water', but do you know what they mean? Is one type of water somehow better th

Competing in the global economy

Electronics Forum | Wed Apr 18 20:41:59 EDT 2007 | Machine Designer

The point is that shift is all about adapting not doom and gloom. BTW: Thanks for the flame and insulting words Brett. Way to hijack a thread that merely pointed to some interesting facts that could create some interesting dialog. I was merely inviti

Epoxy on bottom of SMT component

Electronics Forum | Tue Dec 04 10:30:16 EST 2007 | slthomas

Q: The question I have is do they wet in wave solder, and if they do, why does it matter what happens to them in reflow? A: Yes, but somebody here don't agree with me that the glued part need help from wave to get the good wetting. They are wrong

Question of delamination in PCB

Electronics Forum | Thu May 07 20:28:35 EDT 2009 | davef

From our notes, the following is a series of snips from: "Copper Dissolution in Tin" LJ Turbini, PhD, adjunct faculty member, University of Toronto, Materials Science and Engineering, SMT 2/07 As the solder becomes molten, copper from the board diff

Mirtec programming discussion

Electronics Forum | Fri Nov 05 10:35:18 EDT 2010 | methos1979

This was a great post from another thread here with some tips: Date: November 04, 2010 07:42 PM Author: eadthem Subject: Who has best desktop AOI ? We do almost exclusively SMT parts but for solder with a 45 degree fillet angle use vertical light


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