Electronics Forum | Thu Mar 28 16:00:31 EST 2002 | bschreiber
Hello Dave, Water Washable (Organic Acid, OA) post solder flux residue is designed for cleaning in plain water without cleaning chemical additives. The real advantage of water washable flux was that it cleaned in plain water without additives � no
Electronics Forum | Sun Aug 18 06:23:34 EDT 2002 | bentzen
Hi Ken. It's always fun and a good exercise to debat on a interesting subject like this. I can see at your response that I have to clarify some of the issues. Yes, the placement machine should be the line bottleneck. And in a line with more placem
Electronics Forum | Thu Aug 15 15:44:46 EDT 2002 | dragonslayr
You can't control what you don't measure. You have provided very little detail other than post reflow costs are high. What defects are attributed to problems experienced prior to reflow? Are these random or recurring defects? You will need to put ea
Electronics Forum | Tue Aug 20 18:15:02 EDT 2002 | davef
Haaaaa!!!! Soldering to plastic!!!! An apt analogy!!! I like to compare it to soldering to dirt. Some thing. In fact, you are soldering on nickel, when soldering on many things. It�s just that the gold, er Pd, flash enables the wetting mechanism
Electronics Forum | Tue Oct 22 12:47:01 EDT 2002 | kenbliss
Hi Yngwie I am not sure where you are trying to go with your questions, but it appears you are looking for a way to monitor how productive your production lines are running. With the assumption that these are SMT lines your are running you should f
Electronics Forum | Wed Apr 30 19:55:21 EDT 2003 | Mike Konrad
In all likelihood, you may not be leaving flux on the board rather you may be leaving saponifier on the board. Improper rinsing is a leading cause of cleaning related board failures. The problem with some inline cleaning systems (especially old o
Electronics Forum | Fri May 02 16:58:39 EDT 2003 | swagner
We have been building with flex circuits for nearly three years now, its an automotive product utilizing lead free paste, I will give you a few pointers. 1. Evaluate your supplier carefully, make sure you have some kind of stretch tolerance on the p
Electronics Forum | Mon Jun 23 04:00:43 EDT 2003 | Paul Cooper
Hi there There are a number of things worth considering when viewing bga's. Firstly, like any other solder joint that you have been inspecting for years, suface finish is critical. Secondly, and again like other joints shape is important. Now it may
Electronics Forum | Wed Sep 10 11:57:14 EDT 2003 | Mike Konrad
First, you must determine a few things: 1. What specific de-fluxing chemical are you going to use? Basic required determinations include the chemical�s pH, is it a VOC (if so, what is its VOC content), what concentration is the chemical used in (1
Electronics Forum | Fri Nov 07 12:48:31 EST 2003 | rholland
I have seen in the last couple of months more boards with a white hazing under the solder mask. I ran a few tests on a board to determine the cause of the white hazing underneath the solder mask. First I confirmed, or at least I think I confirmed, t
