Electronics Forum | Tue May 08 22:34:53 EDT 2007 | davef
Do you mean "how to solve or reduce this defect at wave soldering process" while continuing to use-up my SACX solder? If so, try: * Smaller solder volumes lower shrinkage hole / hot tears [Higher hole diameter versus pin diameter helps in reducing v
Electronics Forum | Wed Mar 22 12:28:33 EST 2006 | Rob
Leave us alone, olive oil isn't the same as crude! Defect of the month is... hot tear. http://www.smartgroup.org/pdf/Defect01.pdf
Electronics Forum | Tue Aug 02 22:49:55 EDT 2005 | davef
IPC-A-610D Section 5, shows a variety of photographs of: * Good lead-free solder connections * Lead-free soldering anomalies Hot Tear / Shrink Hole is one such anomaly. This shrinkage effect appears primarily on wave-soldered joints, but can also
Electronics Forum | Fri Jun 18 20:29:39 EDT 2004 | Ken
The problem is lead enrichment regions forming in the hottest part of the joint. The lead pool is the weakest part of the (SMT) joint. In TH interconnects hot tear or pad lift can result. I have recently seen this first hand.
Electronics Forum | Mon Aug 01 20:02:20 EDT 2005 | Joseph
We use SAC305 and top side particular joint temp. is 110 deg C, and the terminal finish for that particular lead is pure tin. It look like hot tearing at the primary side of PTH.
Electronics Forum | Mon Apr 10 13:10:06 EDT 2006 | Marcus
No I have seen Zero hot tears. Thats with water soluble or No-Clean. We have built over 10,000 boards.
Electronics Forum | Wed May 09 11:01:27 EDT 2007 | callckq
Yes, continue to use SAC solder. However, as far as I know, the problem become more severe when cooling rate is increased.
Electronics Forum | Tue Aug 05 02:43:05 EDT 2008 | Sean
Dear All, In order to understand the issue, pls review the photo in the attached file. Thanks, Sean
Electronics Forum | Fri Aug 08 06:44:17 EDT 2008 | Sean
Thanks Davef....How is this defect look like when it appear on BGA?? Is it also a smooth cut? BTW, I really appreciate your help..Sean
Electronics Forum | Fri Mar 24 12:16:37 EST 2006 | patrickbruneel
Darn Rob you're brilliant You just solved the dilemma of micro cracks and hot tear in lead free, just add a softer metal like.....and the joints won't crack. You wrote "BTW: Lead is far softer & dissolves far more easily than copper or tin, hence wh
