Electronics Forum | Fri Jun 23 14:10:01 EDT 2000 | Chrys Shea
Sounds like the mask to me. Had a similar situation a couple years ago. The mask wasn't fully cured, so it absorbed water that the preheaters couldn't dry out. When it outgassed at the wave, it caused a lot of micro turbulence that broke the surfa
Electronics Forum | Wed Sep 08 17:49:19 EDT 2004 | gregoryyork
Knock off some balls and you may find it has a flat bottom to it were it has mechanically stuck to the solder resist usually seen under 60X magnification. Common with Liquid photoimageable resist (I know again) Best way to check resist cure is to pay
Electronics Forum | Tue Jun 01 11:51:48 EDT 1999 | Dave F
| We have experienced problems with chlorine damaging certain components, is there anyone with similar problems and possible solutions ? preferably info about a source for chlorine free solder paste | | Thanks | | James | James: There is no chlor
Electronics Forum | Tue Mar 16 20:29:27 EST 1999 | Bob Bartolotta
In Section 5.1 Flux Residues, 5.2 Particulate matter 5.3 Chlorides and Carbonates & White Residues, I am assuming that these boards have been through some type of cleaning step. Hot water, saponifier, air dryed and the pictures illustrate unacceptab
Electronics Forum | Wed Nov 14 12:11:04 EST 2001 | eabbott
We are experiencing many solder balls after wavesolder. Two different board suppliers of the same board are involved. My initial reaction was that it was the process but in researching information in this forum I am beginning to wonder. How can on
Electronics Forum | Thu Mar 24 02:21:14 EST 2005 | Nifhail
I've heard about the dessicator i.e.useless in sealed bags, ineffectual, but have not heard about the Dryer Indicator will contaminate the immersion Silver/Tin surface. Can someone help? I was told that the dryer indicator (HIC) that contains sulphur
Electronics Forum | Thu Apr 14 07:10:54 EDT 2005 | John O'reilly
Hello We are currently getting Proto's of legacy product built up in Europe. Our current supplier uses a spec of 14 micrograms or less of sodium chloride per square inch as measured on a omega meter. THe product is Industrial and I am not sure do we
Electronics Forum | Mon Mar 29 21:19:38 EDT 2010 | mbclemens60
I have a customer that wants 5000 hrs to red rust. The steel is plated with chloride zinc (barrel plated) and a black chromate. They say a company in Taiwan has the technology, but can not deliver in a production setting. Does anyone know of a cost e
Electronics Forum | Thu Jul 31 15:41:23 EDT 2003 | davef
Q: Could any of you guys tell me what exactly is this greenish thing ? A: No, but is not copper oxide. Copper oxide is brown, the color of a penny [here in the US] or an untreated copper laminated trace on a board. Many copper salts are greenish in
Electronics Forum | Thu Mar 02 21:09:22 EST 2000 | Dave F
Doug: To remove paints, we've tried a bunch of stuff like messy, hazardous chemicals (ie, methylene chloride, xylene, toulene). We've blasted (erzat been blasted???), like Stu says. We used etching pens. Auuuurgh!!! Now, we paint over them with
