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October 1999

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Subject:
From:
Phil Zarrow <[log in to unmask]>
Reply To:
TechNet E-Mail Forum.
Date:
Mon, 4 Oct 1999 15:27:25 EDT
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In the early days of SMT, before most packages were available in PLCC or QFP
form, people would take DIPs and adapt them for SMT.  The most common way was
to run them through a lead former, such as Heller (now built by GSD, I
believe) or a HEPCO, and trim the leads.  The result was a connection we call
"I-lead" or "Butt-joint" (not to be confused with the "Beavis-joint".  While
the butt-joint is not as reliable as a gull-wing or j-lead interconnect, due
to smaller surface mating area and much small heel and tow, it suffices in
many applications.  The trimming equipment is very inexpensive and you will
likely find it in companies that still deal with through-hole components.
Have fun!
regards,
Phil Zarrow
ITM Consulting
Durham, NH  USA
www.ITM-SMT.com

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