Electronics Forum | Tue Sep 30 14:16:49 EDT 2003 | davef
While your waiting for others to respond, search to fine SMTnet Archives on: "solder and gold and finger"
Electronics Forum | Wed Dec 13 09:42:44 EST 2000 | jacqueline
Hi there, Could someone please tell me diferences and possible benefits that are found when using silver as a pcb finish as opposed to HASL. I've already tried the archives without much luck. ta much, jack
Electronics Forum | Tue Nov 20 21:08:29 EST 2001 | davef
There are lots of angles on this topic. Search the fine SMTnet Archives to review past discussions. Don�t deceive yourself. Doing a good job with SPC requires work. �Easy SPC� ends-up being something that people do, get bored with, see limited va
Electronics Forum | Fri Jun 14 14:29:22 EDT 2002 | davef
Russ makes good points. Search the archives for: * Links to rework machine profiles. * Discussion on people causing corner shorts on their BGA, when heating them too rapidly, making the corners to curl like potato [potatoe?] chips.
Electronics Forum | Tue Jul 18 22:11:13 EDT 2006 | davef
Aping Russ' reply: * ~70% of the time solder on gold fingers is caused by poor printing and handling processes. * ~25% of the time solder on gold fingers is caused by poor thermal recipe when soldering. * ~5% of the time solder on gold fingers is cau
Electronics Forum | Thu Jul 26 22:52:56 EDT 2007 | davef
Choices are: * Respin the board to move the via so that it is no longer under the pad. * Have the board fabricator plug and plate over the via. Search the fine SMTnet Archives for background.
Electronics Forum | Fri Jan 22 14:18:21 EST 2010 | davef
Search the fine SMTnet Archives to find threads like: * http://www.smtnet.com/Forums/Index.cfm?CFApp=1&Message_ID=5127 * http://www.smtnet.com/forums/Index.cfm?CFApp=1&Message_ID=9250
Electronics Forum | Mon Aug 26 20:35:08 EDT 2002 | davef
There are no industry standards for eutectic solder-paste in conjunction with the life span of solder-paste. Whatever that is. Speaking of that ['whatever that is.'], what do you mean by �life span of solder-paste�? Is that: * Shelf life? * Workin
Electronics Forum | Sun Aug 25 17:25:03 EDT 2002 | jersbo
Hi Chris... Funny no one has answered ,,,, read the fine SMTNET archives or Read the paste MFGs spec hehehehe.... but anywho... it really depends on the paste MFG and/or your RH conditions in house... from experience... I can say 3-5 hours.. Most p
Electronics Forum | Fri Jul 01 08:27:54 EDT 2005 | davef
There's a lot of good stuff on prevention in the fine SMTnet Archives. Here's an oldie, but a goodie. http://www.smtnet.com/forums/Index.cfm?CFApp=1&Message_ID=15848 On repairing the boards you have, without using cyanide, try: * http://www.circ
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