Electronics Forum: should you coat bga's (Page 1 of 82)

Conformal coat material dispensed through epoxy needle?

Electronics Forum | Fri Feb 03 17:14:49 EST 2017 | westshoredesign

You should have no problem. We use a very dated Asymtek machine (Automove 303) retrofitted for dispensing, air over syringe. It took time and some tinkering with. But all things considered, we're able to achieve remarkable results. I would recommend

silicone conformal coat and electrical contacts

Electronics Forum | Tue Jan 30 20:38:32 EST 2007 | davef

NASA Internal Advisory: NASA-Issued Return to Flight Wristbands Contaminated with Silicone [snip] 10. PROBLEM DESCRIPTION: Recently we have been made aware of a silicone problem associated with the "Return to Flight" wristbands. These wristbands are

Which side of PCB should be prefered for screening...

Electronics Forum | Tue Sep 18 16:48:55 EDT 2001 | jschake

Why do you think that assembling the BGA, QFP, and fine pitch parts will solve your bridging problem? I would think doing this may cause you more grief by having these more massive components being reflowed upside down fall off during the second pas

What rework station you recommend?

Electronics Forum | Thu May 16 02:47:17 EDT 2019 | Joy

For lab, the bga rework station should with good quality, good brand have nice service, for machine, should use it more than 8-15years, the brand what you writen is good brand, but i still reommend zm r7850A BGA rework station for you, this machine c

Damaged PCB.. what do you think?

Electronics Forum | Fri Mar 16 10:04:41 EDT 2012 | davef

We'd repair a drop board like this. Here's what our old friend Jeff Ferry said is a published article ... When boards lose their edge: when the corner of a circuit board breaks or is damaged, the problem cannot be ignored by Jeff Ferry One of the m

How do you clean OSP PCB's without washing it off?

Electronics Forum | Thu Sep 14 20:11:19 EDT 2006 | davef

You weren't specific about the OSP that you use. We use Entek Plus CU-106A. Yes, just about everything removes Entek, especially if there's heat involved. Ethone states: * Alcohol strips 70% of the coating * Water removes 15% * Kyzen Lonox only t

Re: Hey Guys, you gotta check this out!

Electronics Forum | Mon Apr 26 22:40:27 EDT 1999 | Dean

Hey Guys! Look what I get to try and do this week! I got handed a cardboard box on Friday afternoon with the parts and 20 of these little jewels! That's both sides of the board by the way... Whoever laid this

BGA underfill necessary with conformal coat?

Electronics Forum | Wed Mar 27 21:20:30 EST 2002 | davef

There is two major BGA coating camps. * Camp #1: "We require the coating to be under low stand-off devices but with no filleting. So we apply a thinned dip coat first, and then top-off with a proper spray coat" * Camp #2: "We want no coating under th

BGA failure after coating

Electronics Forum | Wed Sep 30 11:32:45 EDT 2009 | pbarton

What type of conformal coating are you using and are you allowing the coating to migrate under the device in question? If you are allowing the coating unbder the BGA the problem could be CTE of coating is much greater than that of the BGA balls/sold

BGA on conformal coated PCB

Electronics Forum | Fri Feb 13 09:46:51 EST 2004 | roertner

You might want to check int using a BGA underfill material prior to coating.

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