Subject: | |
From: | |
Reply To: | TechNet E-Mail Forum. |
Date: | Mon, 1 Jun 1998 11:54:40 -0500 |
Content-Type: | text/plain |
Parts/Attachments: |
|
|
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
################################################################
TechNet E-Mail Forum provided as a free service by IPC using LISTSERV 1.8c
################################################################
To subscribe/unsubscribe, send a message to [log in to unmask] with following text in the body:
To subscribe: SUBSCRIBE TechNet <your full name>
To unsubscribe: SIGNOFF TechNet
################################################################
Please visit IPC web site (http://jefry.ipc.org/forum.htm) for additional information.
For technical support contact Hugo Scaramuzza at [log in to unmask] or 847-509-9700 ext.312
################################################################
|
|
|