How low temperature solder joint can survive

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Customer puts our board to thermal test. Test cycle is -55c ... - Jan 07, 2015 by DucHoang

Additional info: I use SAC305 solder paste on Enig PCB. ... - Jan 07, 2015 by DucHoang

I bet you that the problem comes from the ENIG brittle solde... - Jan 08, 2015 by Evtimov

DucHoang

#73304

How low temperature solder joint can survive | 7 January, 2015

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 low temperature solder joint can survive through the test. Anyone has document about that issue to share? Thanks

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DucHoang

#73305

How low temperature solder joint can survive | 7 January, 2015

Additional info: I use SAC305 solder paste on Enig PCB.

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Evtimov

#73308

How low temperature solder joint can survive | 8 January, 2015

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.

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