Creating Vias between metal layers

Hi everyone,
I am trying to write some SKILL code for generating a custom power
grid. After dumping the metal rails at different layers, I am now
trying to create vias that would connect rails on different metal
layers. Is there any function in SKILL that would compute the overlap
region between the metal rails at different layers and automatically
insert vias?

Would appreciate any comments.

saby.

 

Saby,
You can use leLayerAnd to get the overlap shapes between a pair of metal
layers. You can then make the result of the layer AND output to the via
layer and use some sort of negative growby on the resulting shapes to get
the vias. You could also iterate over the result of the layer AND with a
foreach and insert one or more vias of the proper size at the center of
each shape. It depends on whether the overlap regions are
simple squares or some other geometry.

Frank

 

Thanks Frank. Let me try this and see.

 

Thanks Richard,
I am still trying to understand your code Thanks a ton.