On 29 Jul 98, Mark Ross wrote:

> We just bought the land pattern standard, IPC-SM-782 and found that many
> of the components we are planning to design are not in here and appear (?)
> to be unregistered.
>
> For instance SOT23-5 is not in the book.  Can anyone recommend a good
> source for ALL or most land patterns.  A source that has a proven land
> pattern track record?
>
> I do not want to use the IPC calculator and waste my time on many
> patterns.  I would like a good resource for this information.  Or does one
> not exist yet?

I run into the same problem too.  But rather than throw the IPC spec out of the
window or writing off the calculator when I have something different, I ask the
guy who's in charge of the pick and place machine.  It's not the most technical
way to create a footprint but he knows what the machine needs to perform
properly.  I can show him something *similar* to what we have in the spec and
he can use that as a basis.

Fair warning tho, TechNet may not be the best place to lambaste the footprint
creator's bible.  You never know about those loonies that are in charge of
libraries.  ;-)

Jo


JoAnn L. Amerson
Design Librarian
Red Lion Controls, Inc.
E-mail: [log in to unmask]
Voice: (717) 767-6961 ext 6308

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