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. 12, 2016
Filed:
Oct. 09, 2012
Altatech Semiconductor, Montbonnot-Saint-Martin, FR;
Philippe Gastaldo, Pontcharra, FR;
Frederic Pernot, Saint-Egreve, FR;
Altatech Semiconductor, Montbonnot-Saint-Martin, FR;
Abstract
The invention relates to a dark-field semiconductor wafer inspection device including, in the following order, a light source for emitting an incident beam to a wafer along a first axis, a concentrator that is symmetrical in relation to a plane passing through the first and second axes and is provided with a mirror that is elliptically cut along a plane perpendicular to an axis perpendicular to the first axis and has a generator parallel to the first axis, parallel first and second slits being set up sideways in first and second portions of the concentrator at the points for concentrating the light that is scattered by the wafer and reflected by the second and first portions of the concentrator, respectively, and a photomultiplier using a slit.