Electronics Forum: adhesion (Page 1 of 142)

OSP adhesion

Electronics Forum | Tue Nov 10 13:31:00 EST 2009 | chris0595

When applying the ECCOBOND E3503-1 thermal adhesive to attach a HB-LED to the slug area of a MCPCB, should the OSP coating on the slug area first be removed? I have heard that OSP coatings have poor adhesion properties so I'm wondering how to do this

OSP adhesion

Electronics Forum | Thu Nov 12 07:51:34 EST 2009 | davef

We have the same concerns about using OSP with adhesives. On the other hand, some suppliers claim their products work with OSP. This have to be handled on a case-by-case basis. How well does OSP transmit heat? It's quite thin.

OSP adhesion

Electronics Forum | Fri Nov 20 12:39:31 EST 2009 | sforman1

Is it possible to use Reactive Nano Technologies solder process?

Coating adhesion problems

Electronics Forum | Fri Sep 24 20:02:39 EDT 2004 | pabloquintana

OK, We have tested and changed several things in our process, but we still getting the same result. We are trying another type of coating. We will see later. My question now is what is adhesion wise acceptable in the industry. I know many of you wi

Coating adhesion problems

Electronics Forum | Mon Sep 20 19:46:16 EDT 2004 | pabloquintana

We use Envibar UV 1244 to coat our PCBs after wave soldering. We clean them with alcohol, and then we coate them manually with a brush. Then they are passed through a UV Oven. We have adhesion problems, and we started by looking at the Envibar, but

Coating adhesion problems

Electronics Forum | Tue Sep 21 11:01:59 EDT 2004 | pabloquintana

Cleaning method will depend on the type of flux > that you use in your soldering process. Yes it is isopropyl alcohol. We use "no-clean" halide free flux (Multicore X33-06i). We still cleaning and I beleive it is because we roto trim the leads aft

Coating adhesion problems

Electronics Forum | Tue Sep 21 10:53:53 EDT 2004 | davef

We know nothing about Envivar UV 1244 and you weren't real clear about the details of the problem or the materials [eg, ws flux, solder mask, etc], but we'd speculate your adhesion problem goes back to the cleanliness of your board. First by 'alcoho

Coating adhesion problems

Electronics Forum | Sat Sep 25 08:59:59 EDT 2004 | davef

IPC-HDBK-830, Guidelines for Design, Selection and Application of Conformal Coatings says: A conformal coating may have several functions depending on the type of application. The most common are: * Inhibit current leakage and short circuit due to h

Coating adhesion problems

Electronics Forum | Tue Sep 21 16:09:08 EDT 2004 | davef

Q1: What is "enough surface free energy"? A1: Look here for background: http://www.azom.com/details.asp?ArticleID=1575 Q2: How do I determine surface free energy? A2: We look at it a relative term. For instance, a semi matte finish on solder mask

Coating adhesion problems

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

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