Negative plane usage with a virtual hierarchical layer
Abstract:
A virtual hierarchical layer (VHL) is constructed for a semiconductor design in order to reduce the computational requirement of design rules checking (DRC) and design rules for manufacture (DRM) procedures. In order to form the VHL, a negative plane is created. A cell and multiple instances of the cell are then identified in the semiconductor design and polygons which overlap the cell and its instances are determined. The polygons are pushed into the negative plane to create holes in the plane. Shapes overlapping other instances of the cell which fall onto holes in the solid virtual cell plane are ignored. The resulting holed solid virtual cell plane can then be inverted to create a VHL to be used for design simulation and verification.
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