Electronics Forum | Wed Dec 02 09:04:48 EST 2009 | sforman1
Josh: This is your choice. It wouldn't be mine. Again, I have been doing this for well over 40 years (http://www.m-coat.com) Sam
Electronics Forum | Tue Jan 16 11:24:47 EST 2007 | realchunks
I think John is right. I've seen the same thing (I think, without a picture who knows)on heavy heatsink parts. But I've also seen this happen on larger parts that move right after being wave soldered. I'm talking within a second or two of being so
Electronics Forum | Mon Jan 15 13:31:11 EST 2007 | John S.
Since it is in a pallet, I would be sure the preheat temperature is correct across the entire assembly. We've seen large temperatue delta's across assemblies that are soldered in pallets. Could be overheated even or contact time too long. Interest
Electronics Forum | Sun Nov 22 19:59:26 EST 2009 | prodivegsr
Hi Davef, The bubbles occurs at the body also...there's also a washing process before the conformal coating:-the Flux residue are removed after washing. ... The curing profile is also something that we are looking into during the initial troubles
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
Electronics Forum | Mon Nov 30 09:05:47 EST 2009 | sforman1
totally wrong. a. I do not reccomend Humiseal UV products. My Dad started Humiseal. b. As the former VP of Dymax Corporation I know quite a bit about this subject. Contact Dymax in Torrington, CT and inquire about 984LV. c. You will definetly sleep b
Electronics Forum | Wed Dec 02 00:31:37 EST 2009 | jlawson
UV40 for you info was developed in Humiseal EU and has been tested heavily against Dymax product. UV40 is a great product has many approvals from major auto and whitegoods makers.... I have seen comparisons UV40 to Dymax 984LV and Dymax comes out se
Electronics Forum | Tue Nov 24 05:23:18 EST 2009 | prodivegsr
Hi Davef, Thanks...Saw 1 of your thread that you posted : Thanks for providing... From davef : There are many possibilities: * Conformal coat is incompatible with surface residue on the board * Conformal coat is incompatible with solder mask on the
Electronics Forum | Wed Dec 02 10:14:42 EST 2009 | duso02
As a large coating house we use 1B73 daily and we have very few issues with bubbles. We very rarely bake it as the air cure is so short. Also, we only use thinner 73 vice 521. Another question would be; how is it being applied? How thick are you appl
Electronics Forum | Wed Dec 02 20:11:37 EST 2009 | prodivegsr
Hi Lou, we are using a fluid dispensing machine. our current requirement is around 50um. From the Datasheet,the thinner 73 has a higher evaporation rate of 1.0 comapring with thinner 521 at 0.6... does the higher evaporation rate eliminate the bu
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