Stats

Locked Locked
Replies 3
Subscribers 165
Views 13756
Members are here 0

mvia to thruvia DRC missing

I am having difficulty getting a DRC to occur when I stack a microvia on top of a thru via. If the mvia is not stacked then the DRC is getting flagged if it's on the edge of the thru via.

However, when the mvia is coincident with the thru via the DRC goes away.

I *think* I have the DRC setup correct for Same Net checking but am puzzled as to why the overlap is allowed.

Any hints on how to flag overlap of thru to mvia?

Thanks

Parents

steve over 6 years ago

Have a look at orcad.co.uk/.../Microvia_Overview.pdf. Page 11 describes the rules required for inset vias.
Cancel
Vote Up 0 Vote Down

Cancel

Reply

steve over 6 years ago

Have a look at orcad.co.uk/.../Microvia_Overview.pdf. Page 11 describes the rules required for inset vias.
Cancel
Vote Up 0 Vote Down

Cancel

Children

redwire over 6 years ago in reply to steve

Hi Steve -- thanks for the link but still no solution. The missing error only happens when a microvia sits on a thru via. The slightest offset triggers the DRC but I need to find out how to get the overlap DRC to show up as well.

Thanks.
Cancel
Vote Up 0 Vote Down

Cancel
steve over 6 years ago in reply to redwire

What about the pad-pad connect options? There is also a via in pad rule that may show DRC's if they are not coincident. orcad.co.uk/.../via_in_pad_rules.pdf
Cancel
Vote Up 0 Vote Down

Cancel

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.