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:
May. 05, 1998
Filed:
Jul. 31, 1996
Applicant:
Inventor:
Jean Canteloup, Monthlery, FR;
Assignee:
Sofie Instruments, Arpajon, FR;
Primary Examiner:
Int. Cl.
CPC ...
G01J / ;
U.S. Cl.
CPC ...
356 72 ; 356328 ;
Abstract
An illumination beam is sent onto a localized region of the surface layer of a thin-film structure which is being etched in a vacuum processing chamber. The reflective light beam is sent through a filter to the matrix sensor of a video camera, and to an optical disperser or an interference filter, a selection diaphragm, a fiber-optic cable, and an analysis slit at the input of the optical disperser or interference filter. A spectral analysis of the reflective light beam is performed to detect, by reflectometry, the transition of the following layer in a specific analysis region of the localized region.