Electronics Forum | Sun Nov 22 19:53:10 EST 2009 | prodrivegsr
Hi Ju Yong, The PCB are dry in an airseal cabinet(Staging Chamber) before IR Oven. The bubbles show at around body and solder joint area. You mean the moisture will create bubbles ? Able to advice the humidity and temperature that you are using in
Electronics Forum | Mon Nov 23 15:26:35 EST 2009 | davef
confo* and bubb*] to fine threads like: http://www.smtnet.com/Forums/Index.cfm?CFApp=1&Message_ID=59681
Electronics Forum | Wed Nov 25 15:16:04 EST 2009 | sforman1
Why in heavens name are you using a heat or air cure conformal coating. Why aren't you using a 100% solids UV cure system. You would never have an issue like this Sam Forman MicroCoat Technologies
Electronics Forum | Mon Nov 30 23:11:50 EST 2009 | prodivegsr
Hi sforman1 Are you refering that the UV is able to cure on solvent based material too ?
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 | Thu Nov 19 10:32:32 EST 2009 | jrr3434
Can anyone tell me if there is a volume difference between a pound of lead vs. lead free solder? Does lead free solder attack stainless or castiron when it's not molten? Thanks. Jay
Electronics Forum | Sat Nov 21 12:22:00 EST 2009 | patrickbruneel
You are technically correct eutectic Sn/Pb was discovered by the ancient Egyptians in (XXX) BC much longer then 20 centuries. I was just referring to soft soldering in the electronics assembly industry :-).
Electronics Forum | Tue Nov 24 18:54:36 EST 2009 | gregoryyork
Some companies claimed their lead free solders wouldnt attack stainless steel, frankly they do and they should not be allowed to get away with these claims. Lead Free does not attack Cast iron
Electronics Forum | Fri Nov 27 15:46:28 EST 2009 | jrr3434
Would i be able to use the cast iron pot from my electrovert with out any problems? I thought the tin would dissolve the iron in the pot? This lead free thing is a headache!
Electronics Forum | Tue Nov 24 19:17:29 EST 2009 | gregoryyork
It could be that the Sn96 has dissolved the Tin rapidly and gone for the Copper. What dwell times are they using with the irons? Probably better off using a Tin Copper alloy for reduced dissolution worth a try Cheers Greg
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