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placing layers with special properties

Hello My dear skill users and masters I was wondering whether we could use skill to design layers that could prevent a specific segment of lets say a M1 polygon that overlaps our layer from being streamed out. for example. i would code in a layer B i place a rectangle of this layer on a layer A path when i stream out, on the gds, the layer A path would miss a segment that was previously under the layer B rectangle. the layer B rectangle doesnt get streamed out. Adhil.

Andrew Beckett over 13 years ago

Personally I don't like this idea - it could be rather confusing/misleading to stream out something different from the drawn shapes in the database. Also, it's not going to handle hierarchy - so often this thing is better handled by a physical verification tool (in much the same way you'd do dummy pattern fill in a physical verification tool).
If you really want to do it, you can use poPreTranslate to do this - you need to define a function to do this. This is new in IC615.
Some existing examples:
http://support.cadence.com/wps/mypoc/cos?uri=deeplinkmin:ViewSolution;solutionNumber=11758568
http://support.cadence.com/wps/mypoc/cos?uri=deeplinkmin:ViewSolution;solutionNumber=11739836
http://support.cadence.com/wps/mypoc/cos?uri=deeplinkmin:ViewSolution;solutionNumber=11714840
Andrew.
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Adhil over 13 years ago

hello andrew
I believe that the samples that you shared deletes specific objects from cells before the cell is streamed out. isn't there a way to mask the object rather than deleting it?
Adhil
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Andrew Beckett over 13 years ago

Adhil,
You need to modify the database (which can be done in memory only, so it's not persistent) - and then stream out will translate everything that remains. That means either deleting the shape, or producing a modified version of the shape (e.g. with dbLayerAnd, and then deleting the original shape).
As I said, I personally think this is bad practice.
Regards,
Andrew.
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