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:
Feb. 26, 2008
Filed:
Mar. 24, 2005
Shao-po Wu, Portola Valley, CA (US);
Xin Wang, Sunnyvale, CA (US);
Mark Pilloff, Millbrae, CA (US);
Aprio Technologies, Inc., Santa Clara, CA (US);
Abstract
Transient edges are used to define shapes in an integrated circuit layout for optical proximity correction. A first variation of the shape includes a first edge, a second edge satisfying an edge transition angle condition in relation to the first edge, and one or more first transition edges connected between the first edge and the second edge. A second variation of the shape includes a third edge, a fourth edge satisfying the same edge transition angle condition in relation to the third edge, and one or more second transition edges connected between the third edge and the fourth edge. Although the first transition edges are different from the second transition edges, both the first and second variations of the shape are identified as having the same shape, thereby allowing flexibility and efficiency in the shape identification process for optical proximity correction.