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. 25, 2014
Filed:
Oct. 31, 2008
Bunsuke Takeshita, Utsunomiya, JP;
Bunsuke Takeshita, Utsunomiya, JP;
Canon Kabushiki Kaisha, Tokyo, JP;
Abstract
The present invention provides an exposure apparatus comprising a projection optical system configured to project a pattern of a reticle onto a substrate, a driving unit configured to drive a plurality of optical elements which form the projection optical system so as to adjust an imaging state of light which passes through the projection optical system, a detecting unit configured to detect a driving error when the driving unit drives a first optical element of the plurality of optical elements, and a control unit configured to control the driving unit to drive a second optical element different from the first optical element of the plurality of optical elements so as to reduce a change in the imaging state of the light which passes through the projection optical system due to the driving error.
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile