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:
Jul. 22, 2008
Filed:
Oct. 21, 2005
Applicants:
Kenji Saitoh, Tochigi, JP;
Miyoko Kawashima, Tochigi, JP;
Inventors:
Kenji Saitoh, Tochigi, JP;
Miyoko Kawashima, Tochigi, JP;
Assignee:
Canon Kabushiki Kaisha, Tokyo, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
G03C 5/00 (2006.01);
U.S. Cl.
CPC ...
Abstract
There is provided an exposure method that includes the steps of forming a phase shift mask having a desired pattern and a cyclic dummy pattern overlaid onto the desired pattern, a part of the desired pattern to be resolved by effects of the dummy pattern being thicker than the dummy pattern's line width, illuminating the phase shift mask by using illumination light having a peak near or on an optical axis in an intensity distribution to transfer the desired pattern onto the exposure plane by projecting light having passed through the phase shift mask onto the exposure plane.