Stats

  • Locked Locked
  • Replies 17
  • Subscribers 145
  • Views 23101
  • 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

Stacked Vias

Davadaroo Baba

Hi,

I am interested to know if these's a way to create a stacked VIA, say a stack of VIA4 & VIA5 in a 6 metal process.

I am interested to know  how do I add this Stack VIA in the technology file? Can I add it to the tech file throught an API like the CreateStdVia & the CreateCustomVia? Or should I specify it in a constarain group entry(desired one),

I need Via4 & VIA5 placed one over the other.

 

Thanks in Advance.

 

Krish

 

Parents

  • Hi Krish,

    In that case, you should use Create->Via and then select "Stack" and you can enter the start and stop layers. It will create a stack of vias. Yes, it's multiple via objects, each of which is between a pair of layers, but this has the advantage of being simpler, and also better understood by multiple tools.

    If  you use create wire, and change through multiple layers (e.g. hit the space bar to change layer), it will place a stack of vias for you.

    Also, in the "Options" toolbar there is an icon to control whether Via Stack selection is on or not (this also appears on the Options->Selection form). What this does is ensure that if you click on a stack of vias, it selects the entire stack, rather than just the individial vias.

    So there really is no need (and indeed it's not recommended) to create specific stacked vias in the tech file.

    Regards,

    Andrew.

Reply

  • Hi Krish,

    In that case, you should use Create->Via and then select "Stack" and you can enter the start and stop layers. It will create a stack of vias. Yes, it's multiple via objects, each of which is between a pair of layers, but this has the advantage of being simpler, and also better understood by multiple tools.

    If  you use create wire, and change through multiple layers (e.g. hit the space bar to change layer), it will place a stack of vias for you.

    Also, in the "Options" toolbar there is an icon to control whether Via Stack selection is on or not (this also appears on the Options->Selection form). What this does is ensure that if you click on a stack of vias, it selects the entire stack, rather than just the individial vias.

    So there really is no need (and indeed it's not recommended) to create specific stacked vias in the tech file.

    Regards,

    Andrew.

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.