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March 2004

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Subject:
From:
"Jason W. Gregory" <[log in to unmask]>
Reply To:
TechNet E-Mail Forum.
Date:
Thu, 11 Mar 2004 09:46:28 -0600
Content-Type:
text/plain
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text/plain (100 lines)
Holey Crikey!

Better you than me! Seriously, how about solder ring donuts placed on each
lead prior to placement, between connector and PCB, then convection reflow.
You should have plenty of clearance on bottom side for leads if you run on
chain, right? Sounds far-fetched, I know, but alternatives could be costly
and actually increase labor time.

Just my .000002 cents


Jason Gregory
Manufacturing Engineer
LaBarge Inc. --- Houston
(281)207-1464
(281)207-1434 fax
(832)724-0076 cell
[log in to unmask]
http://www.labarge.com





                      Steve Gregory
                      <[log in to unmask]        To:       [log in to unmask]
                      M>                       cc:
                      Sent by: TechNet         Subject:  [TN] How would you solder this Backplane?
                      <[log in to unmask]>


                      03/11/2004 09:37
                      AM
                      Please respond to
                      "TechNet E-Mail
                      Forum."; Please
                      respond to
                      SteveZeva






Mornin' All!

One of the guys from our bid department asked me to come and look at a
backplane we're bidding on, and tell him how we would solder it? I went and
looked
at it, and I'm not sure how we would. Go to
http://www.stevezeva.homestead.com
and take a look at Backplane Topside, Backplane Backside, and Backplane
Backside Leads.

The leads for all the connectors protrude at least a half inch or longer
out
the bottom of the board. I'm assuming they are that long because they get
wire
wrapped after the backplane is assembled. But how do you solder something
like that? Some sort of dip solder pot? Drag solder? I don't think I'm
going to
be able to solder a board with leads that long in our Electra wave solder.

I can tell board was mass soldered, and I'm thinking it was dipped somehow.
Because you can see tiny little peaks on most of the lead tips that go
straight
up and down. Is there such thing as some sort of dip solder machine?

Sorry for all the dumb questions, but I've never been around a backplane
like
this, and don't really know how something like this gets built.

Thanks!

-Steve Gregory-

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