Electronics Forum | Fri Feb 11 01:36:22 EST 2005 | brown
OK I am counting someone knowing this. True or False, if my touch-up operators touch-up the smt solder joints too many times will this make the joint weaker? if yes why? and what happens to my intermetalic layer? I have insisted if it looks good don
Electronics Forum | Fri Feb 11 07:14:58 EST 2005 | Bob
Your question is very scary coming from Sanmina !
Electronics Forum | Fri Feb 11 09:32:16 EST 2005 | patrickbruneel
"Finally, going back to your original point "I have insisted if it looks good don't touch it." That's the real issue. You and your operators have different standards. [Can you imagine how much touch-up your going to have when you go to leadfree?]"
Electronics Forum | Fri Feb 11 09:44:01 EST 2005 | pjc
A touched-up solder joint is never as reliable as one soldered correctly by machine. Touching up adds more heat thereby increasing the thickness of the intermetalic bond. Our goal is to have the thinest intermetalic bond in our solder joints. The int
Electronics Forum | Fri Feb 11 11:56:02 EST 2005 | Brian W.
Don't forget the possibility of causing component damage in addition to board damage. Reworking a ceramic capacitor with a hot iron can cause microcracks in teh capacitor. You probably won't find those until much later in the process, maybe even in
Electronics Forum | Fri Feb 11 08:20:25 EST 2005 | Rob
Depends what the joint is on, and how historically it has performed - ie. is it a part that won't wick on the wave, or near a ground plane that never forms properly. It may be that they know something you don't about the board. However any info s
Electronics Forum | Fri Feb 11 08:15:35 EST 2005 | davef
It sounds like you already know the answer. Hand soldering is much more stressful to a board than mass soldering, because: * It is more localized and there is no preheat. * It is more difficult to control. [Different connections require different h
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