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

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Nitrogen Reflow

Frang

#6681

Nitrogen Reflow | 24 May, 2001

What is the guideline to determine the require level of PPM Oxygen in Nitrogen reflow.

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CAL

#6684

Nitrogen Reflow | 24 May, 2001

You should be able to get assistance from http://www.airliquide.com/us/ep&a/TechPapers.htm

Caldon W. Driscoll ACI USA 610-362-1200 cdriscoll@aciusa.org

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Brian Sloth Bentzen

#6701

Nitrogen Reflow | 26 May, 2001

Dear Frang.

The right O2 level are mostly determined by the products you produce (E.i. PCB surface and component solderability).

In reflow I would say the window is between 100 and 1000 ppm, depending on the issues above. Personal I choose a maximum O2 level on 500 ppm for my Ersa Hotflow 7.

You can read more about my considerations in my article on Nitrogen in reflow soldering on:

www.smtinfocus.com/technical_papers_list.html

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