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:
Dec. 31, 2013
Filed:
Mar. 10, 2011
Applicant:
William Peter Van Drent, Best, NL;
Inventor:
William Peter Van Drent, Best, NL;
Assignee:
ASML Netherlands B.V., Veldhoven, NL;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
G03B 27/58 (2006.01); G03B 27/54 (2006.01); G03B 27/72 (2006.01); G03B 27/32 (2006.01); G03B 27/44 (2006.01); G03B 27/52 (2006.01);
U.S. Cl.
CPC ...
Abstract
A level sensor configured to measure a height level of a substrate arranged in a measurement position is disclosed. The level sensor comprises a projection unit to project multiple measurement beams on multiple measurement locations on the substrate, a detection unit to receive the measurement beams after reflection on the substrate, and a processing unit to calculate a height level on the basis of the reflected measurement beams received by the detection unit, wherein the projection unit and the detection unit are arranged next to the substrate, when the substrate is arranged in the measurement position.