Electronics Forum | Wed Jan 07 17:39:26 EST 2015 | duchoang
Additional info: I use SAC305 solder paste on Enig PCB.
Electronics Forum | Thu Jan 08 15:49:10 EST 2015 | emeto
I bet you that the problem comes from the ENIG brittle solder joints. About low temperatures I think you can go to the absolute 0 and the device should still work.
Electronics Forum | Wed Jan 07 17:34:52 EST 2015 | duchoang
Customer puts our board to thermal test. Test cycle is -55c to 85c, repeat cycle in 15-20min. After 600 cycles, lot of TSOP joints are cracked, leads lifted. There are reasons such as thin PCB, mechanical impacts, warped PCB... My question is, how lo
Electronics Forum | Tue May 13 08:59:13 EDT 2014 | gazelle
Hello davef - could it be you are confusing low thermal emf (Seebeck coefficient) with low temperature solder ? I am looking after solder wire and paste with low Seebeck coefficient - cadmium based alloy was OK but banned in europe due to RoHs direct
Electronics Forum | Thu Oct 21 05:42:15 EDT 2010 | jacki
Dear All Does anyone know about the low melting point solder paste which should be Copper Base? Usually the Copper base solder has 227'C of melting point.
Electronics Forum | Sun Oct 31 11:01:06 EDT 2010 | cobar
Alloy properties http://www.shanelo.co.za/Alloy%20Properties.htm
Electronics Forum | Tue Nov 02 02:32:40 EDT 2010 | Jacki
Hi Patrick Noted that. Thanks for ur info.
Electronics Forum | Mon Nov 01 04:40:29 EDT 2010 | jacki
Hi Mark thanks and useful. However, I couldn't find the Copper base solder paste which melting point is lower than 210'C.
Electronics Forum | Sun Oct 31 11:02:51 EDT 2010 | Mark
http://www.shanelo.co.za/List%20of%20articles/Indium%20Alloy%20list.pdf
Electronics Forum | Mon Nov 01 11:43:45 EDT 2010 | patrickbruneel
Jacki, Lead-free Cu based alloys with melting point below 210C don’t exist.
