Hi Matthew! We are currently evaluating on-site N2 generation versus
cryogenic sourcing hence my question last week. We are currently using
cryogenic nitrogen (purity 99.99%) in both our wave solder and SMT
soldering applications. Our internal testing results shows that a oxygen
ppm range of 100-300 in the "reflow segment" of the reflow oven increases
the process robustness for component pitches less than 20 mil. And there is
increasing industry data showing that nitrogen increases the Pbfree
soldering process envelope. Good Luck.

Dave



                      Matthew Park
                      <MPark@PRECO-MORT        To:       [log in to unmask]
                      ON.COM>                  cc:
                      Sent by: TechNet         Subject:  [TN] Another Nitrogen Purity Question/Survey
                      <[log in to unmask]>


                      03/17/2004 10:00
                      PM
                      Please respond to
                      "TechNet E-Mail
                      Forum."; Please
                      respond to
                      Matthew Park







Hi all cryogenic heads,
Several years ago, I looked into a membrane nitrogen generator for the
possibility of supplying inert gas for reflow ovens and wavesoldering
machines.

Are companies using N2 generated by the membrane N2 technology for
reflow/wave? If so, what N2 purity level can be generated?, And how
successful is it for inerting electronic assembly applications?.

Who are major players for supplying membrane nitrogen generators?

thanks
Matthew

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