Find the overlapping shapes between three layers

Kindly note I have referred to the below case.

Program for finding the bBox of the intersection (or AND operator) of two layers - Custom IC SKILL - Cadence Technology Forums - Cadence Community

Referring to this, I tried the following ABE commands, but the output is not coming as expected.

abeInit(cv)
m0=abeLayerFromCellView("Metal1")
m1=abeLayerFromCellView("Metal2")
intersections=abeNewLayer()
abeLayerAnd(m0 m1 intersections) 

Hi,

You should definitely have a look at Cadence Advanced Boolean Engine [ABE] documentation

This is meant to extract all shapes from a layer through a layout hierarchy and efficiently run boolean operations on it

The functions you need are:

abeInit, abeLayerFromCellview, abeLayerAnd, abeLayerToCellView, abeLayerToHilightSet and abeDone

Cheers,

Aurélien

You are missing the last functions I described in my previous answer : abeLayerToCellView, abeLayerToHilightSet and abeDone

Hello Aurélien,

Thank you for your response!

I have used abeLayerToCellView function as well, but in the output layer I am seeing that the AND operation is breaking the overlapping shapes into smaller rectangles. Is that behavior expected? I will try to share an illustration as well.

Also, will check out the abeLayerToHilightSet function.

Thanks,

Anmol

I think the post below might possibly explain why the shapes are splitting into multiple smaller rectangles.

Number of Points for a shape cannot more than 4000 - Custom IC SKILL - Cadence Technology Forums - Cadence Community

Although not sure why the resulting polygons from AND for above layers could have >4000 points.

I am wondering if there are any commands in skill that can help to select shapes of a layer having width greater than a certain value.

Thinking of this as a workaround to filter out the smaller shapes (that are non-overlapping) and then I would be left with the bigger shapes only.

Kindly suggest if there is any such command.

Thanks,

Anmol

Pass ?tiles nil to the abeLayerToCellView() function. The default is that it outputs the individual tiles otherwise.

Well, it doesn't "select" them, but the standard trick to filter small shapes out is to undersize them (e.g. using abeLayerSize with a negative size) and then oversize them again with the same size. If you use half the minimum width you want for the undersizing and oversizing, then they'll be filtered.

Andrew

Hi Andrew, 

Thank you for your response!

I got to try this now, as I got stuck with some other higher priority work.

By passing ?tiles nil to the abeLayerToCellView() function, I am getting the following output:

Output without ?tiles nil is as shown below:

The required output is something like this:

Could you please suggest if there is something else that I can try to get this required output?

Any help her would be really appreciated.

Thanks,

Anmol

Hi Anmol,

Without seeing the data, I can't comment on why the results are the way they are (I'm assuming there are small gaps in the regions where some of the lines are shown). I'm also not sure why it should produce a shape like you've suggested (given that there's no fill in the layers you're drawing it's impossible to see where the solid areas are).

I suggest you contact customer support so somebody can see your actual data. There's not going to be a magic switch to produce what you want - but maybe some additional processing can get there (as I said, I can't guess what the data actually looks like from your pictures).

Andrew