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.:

US 7557978 B1

PDF
Full Text
Expired
Date of Patent:
Jul. 07, 2009

Filed:

Feb. 23, 2005
Applicants:

Keisuke Sato, Kawasaki, JP;

Masao Kondo, Kawasaki, JP;

Inventors:

Keisuke Sato, Kawasaki, JP;

Masao Kondo, Kawasaki, JP;

Assignee:

Fujitsu Limited, Kawasaki, JP;

Attorney:
Primary Examiner:
Int. Cl.
CPC ...
G02F 1/03 (2006.01); G02F 1/295 (2006.01);
U.S. Cl.
CPC ...
Abstract

An optical waveguide is formed of a stack of electro-optic effect films. A stress-relief layer is formed between a substrate and the optical waveguide. The stress-relief layer is comprised of a metal material having a thermal expansion coefficient of 10×10/° C. or higher, for example, a metal material whose major component is one of Au, Ag, and an alloy thereof, and has a function of relieving a binding force to the optical waveguide ascribable to the substrate.


Find Patent Forward Citations

Sato, Keisuke. (2009). Optical element (U.S. Patent No. 7557978). U.S. Patent and Trademark Office. https://idiyas.com/patent/badge/7557978

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