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:
Nov. 16, 2004
Filed:
Nov. 20, 2002
Yasuhiro Anma, Tokyo, JP;
Tomoyuki Hayashi, Tokyo, JP;
Junko Ishizu, Tokyo, JP;
Tatsushi Kunou, Tokyo, JP;
FDK Corporation, Tokyo, JP;
Abstract
An optical waveguide element that can stably and inexpensively form an optical waveguide of low loss and low stress in a glass material by ion exchange of Ag ions, and to provide a process for producing the same are provided. The optical waveguide element is made of a multicomponent glass material, which is Na O—B O —Al O —SiO glass containing from 5 to 13% by mole of Na O, in which an optical waveguide is formed by doping with Ag ions by ion exchange. The composition is preferably SiO : 60 to 75% by mole, B O : 10 to 20% by mole, Al O : 2 to 10% by mole, Na O: 5 to 13% by mole, Li O: 0 to 1% by mole, As O : 0 to 0.5% by mole, and Sb O : 0 to 0.5% by mole (provided that As O +Sb O : 0.01 to 1% mole).