Printed Circuit Board Assembly & PCB Design SMT Electronics Assembly Manufacturing Forum

Printed Circuit Board Assembly & PCB Design Forum

SMT electronics assembly manufacturing forum.


Flux free soldering

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PJ

#51893

Flux free soldering | 24 September, 2007

I am doing some research on flux free/flux less SMT reflow soldering. Do you have any equipent/process recommendations? Does anybody use it for volume production and what are the constraints (finish, balls, paste, vacuum, pressure, size)? What is a good source for literature. I could not find much on the internet. Thanks a lot for your help.

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#51894

Flux free soldering | 24 September, 2007

Try Seho http://www.seho.de/index.php?id=2&lang=en . At one time they had a machine that ran at near 0% oxygen (all nitrogen)that would solder without flux.

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#51895

Flux free soldering | 24 September, 2007

I would look at SST International and Sikama International. You might solder using forming gas. Forming gas is 10% hydrogen and 90% nitrogen or 8% hydrogen and 92% nitrogen.

Chris

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