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:
Dec. 28, 2004
Filed:
Jun. 06, 2002
Applicant:
Inventors:
Kenji Kato, Ama-Gun, JP;
Yoshimasa Kondo, Nagoya, JP;
Takashi Yoshino, Ama-Gun, JP;
Makoto Oomori, Nagoya, JP;
Assignee:
NGK Insulators, Ltd., Nagoya, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
G02F 1/365 ; B05D 3/06 ;
U.S. Cl.
CPC ...
G02F 1/365 ; B05D 3/06 ;
Abstract
A method for producing an optical waveguide by irradiating a laser beam onto an oxide single crystal material includes a means by which the scattering of light from the surface of the waveguide may be prevented when light is transmitted through the waveguide. A laser beam is irradiated onto an oxide single crystal to from an optical waveguide portion defined by laser working faces, which are then subjected to a wet etching process using, for example, a strong alkaline solution.