Electronics Forum: humiseal 1b73 (Page 2 of 3)

Bubbles on solder joint(after conformal coating curing)

Electronics Forum | Sun Nov 29 20:04:05 EST 2009 | prodivegsr

Hi sforman1, The chemical that i'm using is a solvent based coating humiseal 1B73. From my understanding,the UV curing is mainly for UV curable coating like the UV40. And the main advantage of using UV curing is for fast throughput and environment

Conformal Coating Issues

Electronics Forum | Thu May 31 14:59:50 EDT 2012 | jdumont

I use Trace and certainly recommend them. I actually just had this test done last week. Adhesion test per ASTM-3359 Method B. We use Humiseal 1B73, which is similar to what you use. Is your soldermask "active" enough for this coating? I believe

conformal coating over inspection stamps

Electronics Forum | Mon Feb 18 18:13:30 EST 2019 | slthomas

Has anyone found a durable, indelible inspection stamp ink? We have an extreme case of smearing/obliteration because we have the boards dip coated (Humiseal 1B73). The manufacturer of our stamps is zero help, i.e., the best I could get out of them

Coating Brush Touch-up

Electronics Forum | Tue Dec 02 14:31:48 EST 2008 | dontfeedphils

Hey guys, just joined the site and I'm looking for some help. In our coating department we are running a Asymtek C-740 with a Jet and film coater. The coating that we are using is Humiseal 1B73 acrylic. The problem that we are having is that the C

conformal coating after rework

Electronics Forum | Fri Jan 22 10:17:47 EST 1999 | LeeAnne

I have boards coated with Humiseal 1B73. At a late point mfg. site we need to remove a series of 0603 resistors for optioning purposes. I have been trying to determine the fastest, easiest way to re-coat the pads after removal. Drying time of the coa

Conformal Coating Killing Circuits

Electronics Forum | Wed Jul 29 21:16:17 EDT 2020 | SMTA-64387706

Hi, I have a PCB that works fine when tested before conformal coating with HumiSeal 1B73. It seems like the CC is causing electrical issues. We brush it on, so it is a bit thick. After curing we are getting QFNs that do not seem to connect well and a

Re: conformal coating selection

Electronics Forum | Tue Nov 28 13:21:33 EST 2000 | Graham Naisbitt

Terry The SCC3 product is a vinyl modified silicone. It is less able to perform at low temps as it becomes brittle. It is not easy to repair because it is essentially silicone. It is not a qualified material to the MIL-I-46058 Spec. Are you sure yo

High temp PCB coating needed

Electronics Forum | Wed Oct 17 02:04:39 EDT 2018 | robl

SCC3 has an operating temperature of 200C, as long as it is heat cured at 100C. https://www.electrolube.com/pdf/tds/044/DCA.pdf It's also a silicone so needs to be coated & cured away from anything you value. Otherwise there are plenty of PU's and

Conformal coating bubbles with 1B73

Electronics Forum | Wed Feb 16 12:22:54 EST 2011 | duso02

Have you always used xylene? For our 1B73 we use nothing but 73 thinner from Humiseal or PGMEA at about 50/50 depending on the humidity.

Conformal coating bubbles with 1B73

Electronics Forum | Tue Mar 01 15:07:00 EST 2011 | dennisfo

Update on 1B73 bubbles, Changed over to a mixture of Humiseal 73 thinner with coating (25 sec on Zahn 2) observed a reduction in bubble formation (approx. 20%) but still present.

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