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:
Oct. 13, 2009
Filed:
Jul. 02, 2007
Kenichiro Mori, Utsunomiya, JP;
Akihiro Yamada, Utsunomiya, JP;
Noboru Osaka, Utsunomiya, JP;
Canon Kabushiki Kaisha, Tokyo, JP;
Abstract
An exposure apparatus which exposes a substrate to light. An illumination optical system illuminates a mask with illumination light, and a projection optical system projects a pattern of the mask onto the substrate. The illumination light contains a primary component of polarized light and a secondary component of the polarized light, which are perpendicular to each other, and the illumination optical system includes a phase difference adjusting unit configured to adjust a phase difference between the primary component of the polarized light and the secondary component of the polarized light, without changing a direction of the primary component of the polarized light.