Jerry,

Check out this article http://www.aimsolder.com/techarticles/reflow.htm ,which describes "step soldering" and may answer some of what you are
inquiring about.

Howard Watson
Manufacturing Engineer
AMETEK/Dixson




Jerry Mosur <[log in to unmask]>
Sent by: TechNet <[log in to unmask]>
02/13/02 08:08 AM
Please respond to "TechNet E-Mail Forum."; Please respond to Jerry Mosur


        To:     [log in to unmask]
        cc:
        Subject:        [TN] Reflow Process


Hello,

As a part of our preparations to set up an internal SMD line, I would like
to get your opinion on the following topic.
What are the problems, if any, associated with reflowing the double sided
SMT board using solder paste with different melting points for top and
bottom.
Is this a fairly common process?
If not what would you recommend as a best assembly process for double
sided
SMT boards?


Thanks in advance,

Jerry

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