Electronics Forum | Tue Nov 01 10:06:00 EDT 2011 | davef
Humiseal says: Typically, there are three main approaches to avoid coating wicking into press-fit connectors (and other keep out areas). Wicking is a phenomenon caused by a combination of low viscosity of conformal coating material and strong capilla
Electronics Forum | Wed May 09 03:13:06 EDT 2012 | umar
I had send my coating board to the test lab for adhesion coating test. 3 times send, the result 3times fail. The coating chemical use is Humiseal 1B31. The process is clean the boards at washing process use the Vigon A200 saponifier mix with DI wate
Electronics Forum | Wed May 19 19:41:12 EDT 2010 | jry74
Our employees use a knit style ESD glove when masking boards to prevent oils. They snag alot and bend leads and cause other problems. I have tried dipped palm but they are bulky and dont offer "feel". I tried a silky type but they had a huge seam
Electronics Forum | Tue Sep 21 11:39:41 EDT 2004 | pabloquintana
Conformal coat a bare board to determine if there > is there is enough surface free energy from your > solder mask to prevent dewetting. Sorry for my ignorance, but what is "enough surface free energy"? How do I determine that? >* Bake a board
Electronics Forum | Thu Jun 01 21:54:00 EDT 2000 | Dave F
Jeremy: Standards: � A-600 talks about percentage of solder mask loss allowed, according to the location (eg, laminate, bare copper, gold or nickel, melting metals) and equipment class. � A-610 talks to "Solder Resist Coating - Voids & Blisters" by
Electronics Forum | Wed Nov 11 08:37:46 EST 1998 | Wayne Bracy
| I have a need to dispense a latex masking material using an automated dispensing system. We are presently looking at the I&J750. Does anyone have any experience with this piece of equipment, or have a better solution available? | Doug: You mig
Electronics Forum | Fri Mar 06 19:19:54 EST 1998 | Pat
Just recently tryed Miller Stephenson MS-465 spray, worked well. Also using Loctite 5290. The MS-465 air dried in about 15 min. The loctite requires ultra violet curing which took about 50 seconds, but didn't cure completely. The loctite will also
Electronics Forum | Tue May 14 20:43:55 EDT 2002 | davef
I feel as though I�ve just walked in to a bar, where everyone I was supposed to meet has been drinking for 3 hours. First, the volume of water displacement thing doesn�t make sense, as others have commented. Second, I believe Dave Robbie wants meas
Electronics Forum | Thu May 01 13:58:14 EDT 2003 | bremerg
Gentlemen, Does anyone have any failure information on IRC, CHP2-100-R500F (5 OHM, 2W, 1%) resistors. We have experienced two failures on the same circuit board where the metalization on the component separated from the component causing an open ci
Electronics Forum | Mon Jun 14 21:02:50 EDT 2004 | hap
it is not practical to target an exactly 1 mil film thickness, the materials manufacturers do not give an exact solid content figure but only a target range. temperature and batch preparation also play a small role. You could probably target 1 mil p
