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. 28, 2015
Filed:
Aug. 22, 2011
Dieter Bader, Goeggingen, DE;
Dieter Bader, Goeggingen, DE;
Carl Zeiss SMT GmbH, Oberkochen, DE;
Abstract
An illumination system of a microlithographic projection exposure apparatus includes a light source configured to produce projection light that propagates along a light path. The illumination system also includes a beam deflection array of reflective or transmissive beam deflection elements. Each beam deflection element is configured to deflect an impinging light beam by a deflection angle that is variable in response to a control signal. The beam deflection array is used in a first mode of operation to determine an irradiance distribution in the system pupil surface. The system further includes an optical raster element, in particular a diffractive optical element, which is used in a second mode of operation to determine the irradiance distribution in the system pupil surface. An exchange unit is configured to hold the optical raster element in the second mode of operation such that it is inserted into the light path.