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:
Mar. 17, 2015
Filed:
May. 04, 2012
Shin-huang Chen, Puli Town, TW;
Yin-chuan Chen, Taichung, TW;
Shin-Huang Chen, Puli Town, TW;
Yin-Chuan Chen, Taichung, TW;
Taiwan Semiconductor Manufacturing Company, Ltd., Hsin-Chu, TW;
Abstract
Methods and apparatus of performing layout-versus-layout (LVL) comparison are disclosed. A layout may be in various formats such as GDSII or OASIS, for different circuits, and represented by a basic layout element, a hierarchical cell or a plurality of independent cells in various layers. A basic layout element, a hierarchical cell, and a layout with a plurality of independent cells may have a signature generated according to the embodiment methods. The signature of a basic layout element may be generated based on values of a center and a circumference, and a hashed trace value generated by a hash function of a trace of the basic layout element. The signature of a hierarchical cell can be generated recursively. A signature of a first layout may be compared to a signature of a second layout to determine whether the first layout matches the second layout.