Electronics Forum | Sat Aug 26 12:26:57 EDT 2000 | Ramon I Garcia C
Hi friends: I have a problem in the process of one PCB, I have a lot of insuficients of solder in top of the board, this pcb already was working good, but sudenly began there isn't flow thru hole, I ran the profile and it was ok, if I inmerse i
Electronics Forum | Mon Aug 09 10:10:29 EDT 1999 | Gian.D
hello to everybody, we have a really satisfactory no clean process, both smt/reflow and wave soldering, but we get troubles with defects rework; does anybody know how to eliminate flux residues or how not to produce them during rework operations? Th
Electronics Forum | Tue Aug 10 07:47:12 EDT 1999 | Brian
| | | hello to everybody, | | | we have a really satisfactory no clean process, both smt/reflow and wave soldering, but we get troubles with defects rework; | | | does anybody know how to eliminate flux residues or how not to produce them during rew
Electronics Forum | Tue Aug 10 20:22:15 EDT 1999 | Wayne Sanita
Hello, Could be that touchup operators are using too much flux. What are you dispensing flux with. Disposable or refillable flux pens are good to have around. | | | | hello to everybody, | | | | we have a really satisfactory no clean proc
Electronics Forum | Tue Jun 26 12:24:24 EDT 2001 | nifhail
Thanx for the reply Dave. We actually had a few thermocouples attached from underneath to see if there is any delta in temperature within the same BGA's ball. They looks OK, with the slope of 1 -2 Deg C,soak at 120 Deg C - 150 Deg C at about 90 sec,
Electronics Forum | Thu Aug 12 09:02:08 EDT 1999 | Gian.D
| Hello, | | Could be that touchup operators are using too much flux. What are you dispensing flux with. Disposable or refillable flux pens are good to have around. | |Good! could you suggest some suppliers name or address or web site or e.mail...
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 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
Electronics Forum | Mon Jun 25 20:51:43 EDT 2001 | davef
Well, the paste must be OK, because other components don�t have this problem. The board must be OK, because other components don�t have this problem. So, it must be either the component or the profile. I�d speculate that you need to do some work t
Electronics Forum | Mon Jul 26 18:28:10 EDT 1999 | Jon Prokop
Can anyone give me the virtues of SMT package castellations vs. no castellations with particular reference to the ruggedness and reliability of the solder joints? Any references or studies that you can point me to? Also, although I'm in favor of pr
