Electronics Forum | Sat May 06 08:42:18 EDT 2000 | Dave F
Hi Steve: Easy question, Klein Wassink is THE BOOK. It is head and shoulders above the others. Coombs: Very good book, focused primarily on board fab with some discussion on assembly. Lea: A dated, once very good book. Rahn: Average book. Actu
Electronics Forum | Sat Sep 25 07:07:02 EDT 1999 | Brian
| I need a memory jog. What is the term for the growth of conductive contamination after a board is in storage or field? | There are several different mechanisms which can cause this. In reality, ionic contamination is the root cause for many of the
Electronics Forum | Wed Aug 22 22:22:52 EDT 2001 | davef
First an administrative point, you can edit the postings that you make on SMTnet. Look for the yellowish-greenish EDIT button at the top of your posting. Second there are over 170 postings on intermetallic* on the fine SMTnet Production Forum Archi
Electronics Forum | Wed Mar 06 21:16:17 EST 2002 | davef
�What does 5 micrograms of chloride mean to me?� * With SIR testing, you can show no detrimental leakage currents under humid conditions, no corrosion, no metal migration, which are the big factors in figuring out electrochemical reliability. People
Electronics Forum | Thu Apr 18 16:52:15 EDT 2002 | davef
General comments are: * First place I would look is the supplier of the pins that you are trying to install. Most suppliers that sell press fit components have done a good deal of work to qualify the component and will have all the specifications yo
Electronics Forum | Fri Oct 18 21:23:55 EDT 2002 | caldon
David- You are correct!!! DING DING DING!!!! Here is an overview from the ACI website: ACI offers solderability restoration services by using Reduced Oxide Soldering Activation (ROSA) technology to remove the oxide layers from circuit boards or comp
Electronics Forum | Thu Aug 03 19:34:17 EDT 2006 | davef
You might consider an oxygen monitor (or lack of oxygen monitor). A fast response-rate analyzer should be used. There are several types of analyzers on the market and each has different limitations. * If you are looking for a measurement ranging fr
Electronics Forum | Tue Jan 30 18:25:25 EST 2018 | aqueous
This is one of the most common questions I get asked. Why clean no-clean flux. It was stated earlier that no-clean residues are benign. This may or may not be accurate. It depends on several factors including the reflow process. In a perfect world, t
Electronics Forum | Mon Jul 10 21:01:06 EDT 2000 | Dave F
Edmund: Responding to your questions: 1 What is purpose of using DI water to wash a PCBA? Compared to tap water, DI water is less likely to leave: � Metal cations on sensitive components. � Salts of Ca, Mg, and other stuff on metals on the assemb
Electronics Forum | Thu Nov 15 15:27:50 EST 2012 | davef
Finally, help for those searching for compatibility A new standard and guideline will make it much simpler for users to determine whether they’ve got the right chemistry to ensure compatibility. April 23, 2012 By Terry Costlow, IPC online edit
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