Opps! Now I see the subject of your message: SMD on Bottomside.

Why in the world would someone want to put it there?!? Hmm, that is out of
my ballpark. I'm sure you can get a special slective soldering fixture to
protect the QFP, but I don't know who makes them right off the top of my
head.

Can you plug the parts in from the bottom side and build the board in a
mirror image maybe??   : > )





"Hamilton, Richard -4454" <[log in to unmask]> on 09/01/98 03:42:38 PM

Please respond to "TechNet E-Mail Forum." <[log in to unmask]>; Please respond
      to "Hamilton, Richard -4454" <[log in to unmask]>

To:   [log in to unmask]
cc:    (bcc: Charles Barker/US/I-O INC)
Subject:  [TN] SMD on bottomside




Hello all,

I am looking for feedback on anyones experience in dual mode (SM and TH)
manufacturing.

We have one SM device, QFP, located in the middle of the PWB with other
components surrounding it. We want to reflow the QFP, and then do other
placements and then wave solder. We are evaluating masking methods for the
QFP in the wave process.

I would appreciate any feedback on methods tried, and results experienced.
If you have a very positive experience with a specific vendor, I would not
mind receiving that info also.

I appreciate in advance the response and your time in this.

Richard Hamilton
Clemar Mfg. / Rain Bird
[log in to unmask]

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