Electronics Forum: conformal coating (Page 31 of 108)

Acrylic conformal coat cure test method

Electronics Forum | Wed Feb 28 20:10:08 EST 2001 | mhunter

Checked the archives with no luck. Anyone have a reliable test method of verifying acrylic conformal coat cure. Using Humiseal 1B31 mixed with approximately 30% solvent, spraying with a Nordson. Thanks in advance.

Acrylic conformal coat cure test method

Electronics Forum | Wed Feb 28 20:16:26 EST 2001 | mhunter

Checked the archives with no luck. Anyone have a reliable test method of verifying acrylic conformal coat cure. Using Humiseal 1B31 mixed with approximately 30% solvent, spraying with a Nordson. Thanks in advance.

BGA underfill necessary with conformal coat?

Electronics Forum | Mon Apr 01 13:00:27 EST 2002 | BTaylor

We had a problem with conformal coating getting under an IC and with Temp. and vibration would cause cracking of the solder bump, underfill solved the problem.

rubber masking boots for conformal coatings

Electronics Forum | Wed Oct 26 11:21:16 EDT 2005 | Amol

Hi, does anyone know/have used rubber masking boots to mask connectors, headers etc. prior to conformally coating them? i would appreciate contacts for custom rubber boot manufacturers in the united states. Thanks, Amol

Masking of PWBs prior to conformal coat

Electronics Forum | Wed Apr 19 11:18:46 EDT 2006 | BJ

Is there a preferred/efficient method(s)(e.g. tape/masking compounds, boots etc.) for masking off specific areas and/or components on a pwb prior to conformal coating?

Can we apply staking after conformal coating.

Electronics Forum | Fri Nov 12 04:48:02 EST 2010 | raghu

thanks for your reply sir, for conformal coating Humiseal 1B31, what are the preferable staking materials? please suggest us..

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.

Conformal coating bubbles with 1B73

Electronics Forum | Tue Mar 01 15:33:35 EST 2011 | jlawson

If I assume you running a selective coating machine ? Maybe you have small leak and system is sucking in air creating bubbles in mixture, like a sort of venturi action, just idea, can be a faulty fitting , elbow etc. Have had this before....

Conformal coating bubbles with 1B73

Electronics Forum | Fri Mar 04 10:45:43 EST 2011 | dennisfo

I'll try to get some pictures using the Ersa scope this afternoon. Not sure how to post them,may try to send directly to you.I'll take some immediately after coating then of the same after a flash off period.

Conformal coating for equiped pcb

Electronics Forum | Mon May 22 11:22:34 EDT 2000 | Pierre

Does anybody use a material which is repairable (removable chemically), low curing time (UV), masked areas cured, solventless, used with Nordson equipments ?


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