IPC support,

     I've been evaluating methods of inputting IPC standards into our CAD
systems software. The formula approach intrigued me because of it's minimal
amount of input required from a potential user. Problem is... from looking
through IPC-SM-782 manual (published in 1996) I don't find a straight
forward formula for a chip resistor. In your IPC-D-275 publication (dated
September 1991) I've found a formula for chip resistors within section
5.3.4.3 that's very clear. Upon using this formula, when I plug in values
from SM-782 subsection 8.1, heading 4.0, for the 1206 chip resistor, results
doesn't match the land pattern dimensions supplied on the following page.

    To shorten the request, what I would like is the formula used for
generating the chip resistor land pattern values for IPC-SM-782 manual. If
the formula does not reside in the SM-782 spec, please E-mail, or Fax it to
me.

If you have any questions.. please E-mail, or call me.

- Thanks for your help....   Al Arellano

E-mail = [log in to unmask]
Phone = (303) 581 2407
FAX = (303) 581 9973

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