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:
Nov. 20, 2007
Filed:
Apr. 25, 2006
Applicants:
Jiunn-ren Hwang, Hsin-Chu, TW;
Jui-tsen Huang, Taipei, TW;
Chang-jyh Hsieh, Hsin-Chu, TW;
Inventors:
Assignee:
United Microelectronics Corp., Hsin-Chu, TW;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
G03F 9/00 (2006.01);
U.S. Cl.
CPC ...
Abstract
An integrated circuit layout includes dense figures and at least one isolated figure. A plurality of dummy patterns are formed to surround the isolated figure, so as to reduce the difference in pattern density of the integrated circuit layout. A transmitted light of the dummy patterns provides a phase difference of 0 or 180 degrees relative to a transmitted light of the integrated circuit layout. The integrated circuit layout and the plurality of dummy patterns are formed on a photo-mask.