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:
May. 26, 1992
Filed:
Sep. 13, 1991
Nikon Corporation, Tokyo, JP;
Abstract
An exposure apparatus for exposing on a substrate a pattern formed on a mask, comprises a projection optical system for forming the pattern on a predetermined focusing plane and projecting an image of the pattern on the substrate located to be substantially aligned with the focusing plane, driving means for three-dimensionally moving the mask or at least one of a plurality of optical system, or for inclining the mask or said at least one of the plurality of optical members with respect to a plane substantially perpendicular to an optical axis of the projection optical system and correcting means for driving the driving means to anisotropically change optical characteristics of the projection optical system so that the projected image of the pattern is matched with a pattern already formed on the substrate.