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. 30, 2000
Filed:
Sep. 30, 1997
Isao Tsuruma, Kanagawa-ken, JP;
Fuji Photo Film Co., Ltd., Kanagawa-Ken, JP;
Abstract
A metal film consisting of a first metal layer of at least one of Ta, Cr, W and Mo, a second metal layer of at least one of Au, Pt and Ag and a third metal layer of at least one of Ta, Cr, W and Mo superposed one on another in this order is formed on a surface of a substrate. Openings of predetermined shapes are formed in the metal film, and proton exchange is carried out on the surface of the substrate with the metal film used as a mask, thereby forming optical channel waveguides. Then the third metal layer is removed from the metal film, and the metal film consisting of the first and second metal layers into electrodes for applying an electric voltage to the optical channel waveguides.