• Skip to main content
  • Skip to search
  • Skip to footer
Cadence Home
  • This search text may be transcribed, used, stored, or accessed by our third-party service providers per our Cookie Policy and Privacy Policy.

  1. Community Forums
  2. PCB Design
  3. Changing the board size on an existing layout

Stats

  • Locked Locked
  • Replies 5
  • Subscribers 167
  • Views 18695
  • Members are here 0
More Content
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

Changing the board size on an existing layout

Rico Suave
Rico Suave over 11 years ago

 Hi,

 

I am new to this community. I have a question in regards to what the easiest way would be if you take and existing layout ( 6-layers, components placed, traces routed, planes established) and have to make the board smaller than its original design. I created the new card outline, but what about the existing design, Route Keepin and planes. Is there a better way than to ripup the whole design and start over?

 

Thanks,

Rico

  • Cancel
  • chads108
    chads108 over 11 years ago

    Depending on how much smaller the board is, will dictate how drastic the changes may be.  If it is a lot smaller, then obviously components may have to move along with associated etch. If not so much, then you might be able to move some components and then reconnect.  There are a lot of unknown variables, so this is just a high level suggestion.

    As for the planes and route keepin, I find it easier to delete and recreate using Z-Copy with the contract option (assuming your planes are not split).  You could also just edit the shapes manually.

    • Cancel
    • Vote Up 0 Vote Down
    • Cancel
  • Rico Suave
    Rico Suave over 11 years ago

    Thanks for your answer Chad! I have decided to start over after I was made aware of more changes. I created a new file, setup my board outline with Route Keepin and Package Keepin. The problem I run into now is that once I re-netlist the design from the previous old board (changes were made) and open in up in my newly created board outline, it places the old design back into the new file and the new board outline is gone. Any idea what I might be doing wrong here?

     

    Thanks

    • Cancel
    • Vote Up 0 Vote Down
    • Cancel
  • chads108
    chads108 over 11 years ago

    I made an assumption that you are using Allegro for board design, if not, then I don't have an answer.  If you are, the only way I can think of that possibly happening is that when running the packager you are specifing an input and output board file.  I would just run the packager and then from within your new board file, import the logic (netlist).

    • Cancel
    • Vote Up 0 Vote Down
    • Cancel
  • PRASH36
    PRASH36 over 11 years ago

    Hi

    You can use EDIT-->VERTEX option to reduce/increase the outline.

    Eg: If you want to reduce the value by 10mils,then select EDIT-->VERTEX and type in the command line as bellow

    ix 10    (For horizontal)

    iy 10     (For Vertical moment)

     

    Regards

    Prashanth

     

     

    • Cancel
    • Vote Up 0 Vote Down
    • Cancel
  • steve
    steve over 11 years ago

     When you create your netlist you have a Input Board (Start board) and an output Board (End board), make sure your input board is the name of your new board outline, the output board can be a new name if you wish or the same as your input board.

    If you start with the input board set as your old board it will use that as the starting point and that's why you are seeing this again.

    Many users use this function if they have a default template that has outlines, colors, rules, layers etc. They use that as the input board and the output board would be the new project name (example). 

    • 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.

© 2025 Cadence Design Systems, Inc. All Rights Reserved.

  • Terms of Use
  • Privacy
  • Cookie Policy
  • US Trademarks
  • Do Not Sell or Share My Personal Information