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

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.

1B73LOC Conformal Coating

Electronics Forum | Mon Jun 25 10:59:49 EDT 2007 | simsj

We're using the 1B73LOC conformal coating from Humiseal. We've seen some bubbling of the coating. Their tech handbook suggested reducing our oven ramp speed. Does anyone have a good profile for this? They've always pointed me to Nordson, and Nord

Re: conformal coating after rework

Electronics Forum | Wed Jan 27 09:00:56 EST 1999 | Chris Fontaine

| | 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


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