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Identifying different labels on the same node

socallayout

Hi,

 I've searched the forum and have not been able to locate anything along these lines.  I need to select all labels on

"layer 1" at the top level of a layout and find the label that shares the same node (or, effectively, shorted to) on "layer 2"

a couple levels down in the hierarchy.  The origins of all labels should be within the extents of rectangles on a "layer 3"

if there's a way to apply a boolean (layer 3 AND label origin??)  This would be like a text shorts checker (?)

 

Thank You.

  • Note:  I'm working in Cadence 5.1.

     

    Thanks.

  • Well, you could use dbGetTrueOverlaps to find shapes on a specific layer in a particular box (which could be a zero-area box representing the label origin). But to find shorts you'd have to implement some kind of shape-tracer. Surely an ERC or LVS tool would be a better way to do this? Most have short locator tools to help you narrow down where there are shorts between your texts (Dracula, Diva, Assura, PVS have these, at least, and I'm sure others do).

    You can also use Virtuoso Layout XL to do the same thing - if you create pins where the labels are, it will flag shorts if they are both on the same net.

    Regards,

    Andrew.

  •  Andrew, Thanks for the information.  I am currently accomplishing the task with an ERC tool; however, it's extremely inefficient and I have been looking into the possibility of building it in Skill.  I will experiment with dbGetTrueOverlaps.  Thank you again.

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