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. 09, 2014
Filed:
Feb. 09, 2011
Takahiro Urano, Ebina, JP;
Toshifumi Honda, Yokohama, JP;
Takahiro Urano, Ebina, JP;
Toshifumi Honda, Yokohama, JP;
Hitachi High-Technologies Corporation, Tokyo, JP;
Abstract
Disclosed is a defect inspection device comprising: an illumination optical portion which illuminates an object to be inspected with illuminating light; a detection optical portion system illuminated by the illumination optical portion and provided with a plurality of detectors which respectively detects components of scattering light which scatter from the inspected object each in a different direction of azimuthal angle or in a different direction of angle of elevation with respect to a surface of the inspected object; and a signal processing portion which makes gain adjustments and defect decisions in parallel on plural signals based on the components of the scattering light from the inspected object detected by the detectors, respectively, the defect decisions being based on a threshold value decision, and which extracts defects based on results of the gain adjustments and of the defect decisions.