 
| Subject: | |
| From: | |
| Reply To: | (Combined Forum of D-33a and 7-31a Subcommittees) |
| Date: | Fri, 14 May 2010 16:24:53 -0400 |
| Content-Type: | multipart/related |
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We noted that our coupon generator flips the direction of the Y circuit
pattern on the 10th layer to control the length of the E coupon, as shown
in the 1st screenshot below.
Arguably it may compromise the integrity of the test between layers 10 and
11, since there is basically no overlapping circuits. Does a re-design
like the one the 2nd screenshot below violate any coupon design reqts??
The 10th plane use wires in both directions so that it is effective in
testing both against the 9th and 11th planes like this. (Blue is the 10th
plane, Yellow is the 11th plane, purple-ish is where there is data on both
planes)
Has anyone else run into this situation??
Joey Rios
PWB & Process Quality Eng'r
Endicott Interconnect Technologies
1093 Clark St.
Endicott, NY 13760
Office: 607-755-5896
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