Invention Grant
- Patent Title: Negative plane usage with a virtual hierarchical layer
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Application No.: US14713488Application Date: 2015-05-15
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Publication No.: US09916411B2Publication Date: 2018-03-13
- Inventor: Gary B Nifong , Jun Chen , Karthikeyan Muthalagu , James Lewis Nance
- Applicant: Synopsys, Inc.
- Applicant Address: US CA Mountain View
- Assignee: Synopsys, Inc.
- Current Assignee: Synopsys, Inc.
- Current Assignee Address: US CA Mountain View
- Agency: Alston & Bird LLP
- Main IPC: G06F17/50
- IPC: G06F17/50
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.
Public/Granted literature
- US20150339426A1 NEGATIVE PLANE USAGE WITH A VIRTUAL HIERARCHICAL LAYER Public/Granted day:2015-11-26
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