Stats

  • Locked Locked
  • Replies 2
  • Subscribers 143
  • Views 10696
  • Members are here 0
This discussion has been locked.
You can no longer post new replies to this discussion. If you have a question you can start a new discussion

Flatten a pCell and Regroup After modification

Kevin Buck

The PDK I'm using does not have the capability of removing a S/D metal and contact. I'm trying to create a standard cell library and I'd like to remove this from the device by flattening the cell and manually deleting the unwanted metal1 and contact layers. The problem I'm having is that I would like to regroup the remaining shapes and be able to define the device correspondence between schematic and layout so that it is Layout XL compliant (so when you select the device in the schematic or layout it is selected in the other view). If I try grouping the leftover shapes the group is not recognized as an instance and I'm not able to bind the schematic and layout devices. Is there a way to force the tool to recognize a group as an instance so I can do this?

Parents

  • Hi Kevin,

    It would need to be an instance of some sort - so there are two approaches:

    1. Build a wrapper PCell which augments the standard PDK device by selectively removing the metal/contacts but otherwise uses the standard PDK device under the hood (this is very easy to do using the Cadence PCell Designer tool rather than writing SKILL code - contact your account team if you're interested pursuing that approach).
    2. Creating a fixed cellView for the particular modified device (so it's an instance rather than a group).

    Regards,

    Andrew

  • in reply to Andrew Beckett

    Great, thank you for the reply.

Reply Children
No Data

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.