Electronics Forum: wetting problem (Page 1 of 69)

PCB Contaminated by minerail oil / wetting problem

Electronics Forum | Fri Aug 04 06:43:40 EDT 2017 | kubabel

Dear all, I´d like to ask You, if somebody faced similar situation like we are facing in our plant right now. We have wetting problems with some of our products. During SEM/EDX we found on non-wetted parts residues of Mineral oil - white - heavy. Do

PCB Contaminated by minerail oil / wetting problem

Electronics Forum | Thu Aug 31 08:44:52 EDT 2017 | hxamalia

Hello Kubabel, Good day , it is Amalia from HX Circuit Technology Co.,Ltd in China, we are a prefessional PCB factory with many years. We forcus on producing Aluminum PCBs for LED , please contact with me now ,thanks Email: amalia@hx-circuit.com

QFP wetting

Electronics Forum | Mon Nov 12 10:57:23 EST 2007 | chineechooze

i will supply dah 3d chart to sol the problem foryou

QFP wetting

Electronics Forum | Mon Nov 12 01:18:29 EST 2007 | sin4d

Hi, ALL I experience some QFP with wetting issue on the heel of the lead. There is no fillet wetting on the heel which causes reject bt the customer, but not all the QFP. Could anyone pls help what is the causes of this problem, it is due to oxidati

SN100C wetting problems

Electronics Forum | Thu Jul 19 17:06:54 EDT 2007 | aisart

SOOOO true!!!

SN100C wetting problems

Electronics Forum | Fri Jul 13 10:57:04 EDT 2007 | dboudreau

Dear all, we are using the lead-free SN100C solder alloy for wave soldering. We are experiencing wetting problems each time we have to solder a thick board or a board with a large ground plane.I think that maybe we are not using the right flux. I w

SN100C wetting problems

Electronics Forum | Fri Jul 13 12:27:30 EDT 2007 | jseagle

As in more dwell? We see the same problem with through holes connected to power or ground planes. The solder reaches the plane and stops. We are having our boards re-designed to increase the thermal relief and expand the hole size. We are also tr

SN100C wetting problems

Electronics Forum | Tue Jul 17 10:25:59 EDT 2007 | hussman

You want to know which flux will over come thermal mass problems? That's easy - none.

SN100C wetting problems

Electronics Forum | Fri Jul 13 12:20:33 EDT 2007 | jdumont

There are a lot of areas that could be leading to this problem. We have some of these issues on some boards with this solder as well but the hole fill still meets IPC class 3 requirement of 75% vertical hole fill. Through hole diameter is important.

SN100C wetting problems

Electronics Forum | Tue Jul 17 09:49:21 EDT 2007 | slthomas

We haven't used no-lead yet so I can't speak to the specifics of that part of the equation, but am I the only person here that sees "thick board or a board with a large ground plane" and immediately thinks this is a thermal issue? Am I oversimplifyin

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