Stats

  • Replies 17
  • Subscribers 164
  • Views 23165
  • Members are here 0
More Content

Detected Layer-to-Layer Polygons that overlap

maxwellj

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.

Parents

  • maxwellj said:

     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

     

    I feel your pain...  we should compare war stories.  I just spent 3 weeks with 4 engineers who all disagreed on an area that was in reality 100 mils by 300 mils.  Not one person considered the material weave effects but 0.1 mil adjustments were made by each person contrary to the other.  When the gerber was finally produced at 1:1, I could hear the deafening silence as everyone realized what filled my workstation screen was a microdot in real life. :)  Did we simulate this circuit? No.  We don't want to pay for a license.  Why do science when "feel good" engineering works? :)   Sigh...

Reply

  • maxwellj said:

     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

     

    I feel your pain...  we should compare war stories.  I just spent 3 weeks with 4 engineers who all disagreed on an area that was in reality 100 mils by 300 mils.  Not one person considered the material weave effects but 0.1 mil adjustments were made by each person contrary to the other.  When the gerber was finally produced at 1:1, I could hear the deafening silence as everyone realized what filled my workstation screen was a microdot in real life. :)  Did we simulate this circuit? No.  We don't want to pay for a license.  Why do science when "feel good" engineering works? :)   Sigh...

Children
No Data
Cadence Guidelines

Community Guidelines

The Cadence Design Communities support Cadence users and technologists interacting to exchange ideas, news, technical information, and best practices to solve problems and get the most from Cadence technology. The community is open to everyone, and to provide the most value, we require participants to follow our Community Guidelines that facilitate a quality exchange of ideas and information. By accessing, contributing, using or downloading any materials from the site, you agree to be bound by the full Community Guidelines.