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:
Mar. 20, 2018
Filed:
Mar. 11, 2016
Carl Zeiss Smt Gmbh, Oberkochen, DE;
Martin Endres, Koenigsbronn, DE;
Carl Zeiss SMT GmbH, Oberkochen, DE;
Abstract
An illumination optical unit for EUV projection lithography guides illumination light toward an object field. A field facet mirror of the illumination optical unit has a multiplicity of individual mirrors which are switchable between at least two tilting positions. A pupil facet mirror of the illumination optical unit has a plurality of stationary pupil facets and is disposed downstream of the field facet mirror in the beam path of the illumination light. The pupil facets serve for the at least sectionally superimposing imaging of a group of the individual mirrors of the field facet mirror into the object field via a group-mirror illumination channel.