Jim -

Most of the board fabricators I have dealt with in the past five years or so
prefer to generate the coupons themselves, as a part of data preparation
prior to fab.  There are several good reasons for this preference:
1] coupon placement on the panel;
2] ability to tailor coupons to the specific design and not have to recheck
what the original designer may or may not have done;
3] ability to generate coupons which are current, rather than possibly
generated many years ago with the original design;

This also allows the fabricator to use only the coupons necessary for their
compliance with IPC-6012 rather than the full coupon set.

Recommend you check with your suppliers to determine what approach is most
compatible with their business systems and capabilities.

Regards - Kelly

-----Original Message-----
From: West, Jim <[log in to unmask]>
To: [log in to unmask] <[log in to unmask]>
Date: Wednesday, October 13, 1999 9:27 AM
Subject: [TN] Specifying test coupons


>Hi all,
>
>Thanks to all that responded to my earlier test coupon question.  I have a
>few more question, how do you specify test coupons?  What do I tell the
>board layout guy?  What do I tell the board house?  Does everyone have test
>coupons on all boards or only multilayer?  Any good advice on how to
specify
>would be great!
>
>Thanks,
>
>Jim West
>Manufacturing Engineer
>
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