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Detected Layer-to-Layer Polygons that overlap

I was wondering if anyone has a routine that goes in and lists all polgyons that overlap each other on a layer to layer basis. We've been directed to find a way to check all our layers 1-2, 2-3, 3-4, .... and note any voltage polygons that overlap each other and then give them a percentage of overlap for each shape. It's overkill, but these people have no other work to do, so they make new work for us. Any help would be appreciated.

aCraig over 15 years ago

I just tried to post some SKILL code to do this. But the moderator stop the post. Let me know if you'd like it send to you personally.

Craig
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maxwellj over 15 years ago

Craig-
I would appreciate any help you could provide. My email is my forum name @nc.rr.com and anything you could offer would be apprecaited.
Joe
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vramanan over 15 years ago

mike1coppercad said:
Why do you need to measure the overlap?

Just wondering...

In 48V design you want to avoid any digital signals or GND overlap w.r.to 48V signals
Any 48V noise picked up by digital signals will make false triggers and signal integrity nightmares
and the Z gap is to make sure that 48V signals are isolated by enogh margin

regards
Venkata
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vramanan over 15 years ago

Craig
I would appreciate your inputs on this
please send me the example code to me at vramanan @ infinera.com

regards
Venkata
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maxwellj over 15 years ago

Mike-
We're using some 1-ply material on our board due to the number of layers and a limited board thickness for mechanical reasons. Our design coucil demands 2-ply at a minimum, but we can't do it because of physical size constraints. They demand we provide all the poylgons (power) that cross so if there is a void in the material, they can assign probabilities to the chances of the board smoking. Yeah, I'm giggling here, too. :) Truth is stranger than fiction. This council has no technical knowledge, so our effort will be doubled to get it approved.
joe
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