Automatic cutting of a layer in a layout @ virtuoso software

I don't understand what you mean by "automatic cutting". Are you talking about having some kind of "dynamic voiding" (as is common in PCB tools)? That's available via the Virtuoso RF interface when editing module (package) or board layouts using a board technology but not (as far as I know) on IC fabrics.

If you want to cut one layer with another, you could use Tools->Layer Generation and then use "AND NOT" to cut the first layer with the second (to produce a third layer). Maybe that's what you want?

Andrew

Thanks dear Andrew 

Exactly I mean if there is any more CHOP options in software(virtuoso) or not. Or is it possible to have customized CHOP function to remove chop shapes smarter and intelligently ? 

For example I attached the pic and you can see pink rectangle(SX_CUT) and the green shapes (T3 layer) and I want to remove the SX_CUT only that area contained T3. All holes here are done by CHOP GUI feature and only user should exactly create rectangle around T3 .

If we can tell to machine to only remove rectangle around the T3 layers with dedicated distance. That would be better and easier way to reach our goal. 

tnx

Sepsepoo

That sound exactly like a job for the "AND NOT" layer generation that I mentioned earlier. You'd start your original rectangle of SX_CUT as the first layer, have the T3 layer as the second layer, and output layer also as SX_CUT. Select all the shapes you want to be involved and OK the form. You'll have the original rectangle still remaining (so you'd want to delete that), but have the chopped SX_CUT output layer.

The Chop command doesn't give any options to specify the chop regions based on shapes on another layer. That could be done with SKILL code, but I don't really see the point when the layer generation tool does this for you.

Andrew

Hi Andrew. 

Thanks for your kindly replay. Unfortunately the "T3" layer as the second layer is not located in the same cellview of first layer(SX_CUT) and it is in another cellview and inside the RF transistor. How to access all layer in one cellview ?  Is it possible to have a flat "gds" file that there is no sub cell and hierarchy? And after that I can use "AND NOT" feature. 

Regards

Sepsepoo

You can use this SKILL code. Put it in a file (e.g. CCFcutWithLayer.il) and then load it in the CIW or your .cdsinit using load("CCFcutWithLayer.il")

Select your SX_CUT shapes, and then invoke CCFcutWithLayer()

You can also call it with different layers - e.g. CCFcutWithLayer(?sourceLayer "Metal5" ?cutLayer "Metal4") 

It also allows you to choose whether the resulting shapes are merged, whether it deletes the original (uncut) shapes after doing the cutting, and so on. It handles the cut layer being down in the hierarchy.

Andrew

procedure(CCFcutWithLayer(@key (objects geGetSelSet()) (cutLayer "T3") 
        (sourceLayer "SX_CUT") keepOriginal (merge t))
    let((shapesToCut layer1 layer2 resultLayer cvId newShapes)
        shapesToCut=setof(shape objects shape~>layerName==sourceLayer)
        when(shapesToCut
            cvId=car(shapesToCut)~>cellView
            abeInit(cvId)
            layer1=abeLayerFromShapes(shapesToCut)
            layer2=abeLayerFromCellView(cutLayer)
            resultLayer=abeNewLayer()
            abeLayerAndNot(layer1 layer2 resultLayer)
            newShapes=abeLayerToCellView(
                resultLayer sourceLayer ?shapeIds t
                ?tiles !merge
                )
            unless(keepOriginal
                foreach(shape shapesToCut dbDeleteObject(shape))
            )
            abeDone()
            newShapes
        )
    )
)

Hi Andrew

  Many thanks from you again. 

 I run the skill code but there was a problem:

And also I made a mistake : 

(sourceLayer "SX_CUT") ----> SXCUT is true and I should delete the _ in source code...

  * abeLayerToCellView:  unrecognized  keyword  -  ?shapeIds

You must be using a version prior to IC6.1.8/ICADVM18.1 ISR2 (.500.2 at the end) which was when the ?shapeIds argument was added to abeLayerToCellView. You can just remove the ?shapeIds t part in the code - the function won't return the list of new shape objects, but I suspect that you wouldn't need that anyway. Instead the function would now return t to indicate that the resulting shapes were generated.

Note that you don't necessarily have to change the code to fix the "SX_CUT" - that's just the default - instead you could have just called CCFcutWithLayer(?sourceLayer "SXCUT") . However, it's example code - you can edit it as you like!

Regards,

Andrew

You must be using a version prior to IC6.1.8/ICADVM18.1 ISR2 (.500.2 at the end) which was when the ?shapeIds argument was added to abeLayerToCellView. You can just remove the ?shapeIds t part in the code - the function won't return the list of new shape objects, but I suspect that you wouldn't need that anyway. Instead the function would now return t to indicate that the resulting shapes were generated.

Note that you don't necessarily have to change the code to fix the "SX_CUT" - that's just the default - instead you could have just called CCFcutWithLayer(?sourceLayer "SXCUT") . However, it's example code - you can edit it as you like!

Regards,

Andrew

Amazing. God bless you.