The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Aug. 14, 2018
Filed:
Dec. 22, 2015
Shanghai Huahong Grace Semiconductor Manufacturing Corporation, Shanghai, CN;
Abstract
A method of identifying repeating design cells in a layout is disclosed. The method includes: providing a layout including a plurality of first leaf cells and a plurality of second leaf cells; identifying a plurality of groups each consisting of overlapping first and second leaf cells; for each of the groups, selecting a first or second leaf cell as an observational cell and establishing a coordinate system originated at a single reference position of the observational cell, thereby obtaining a plurality of coordinates of the overlapping first and second cells; for each of the groups, sorting the coordinates and generating a hash; and identifying ones of the groups having identical hashes as repeating design cells.