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:
Jul. 27, 2010
Filed:
Jun. 06, 2008
Applicant:
Masaki Yanagisawa, Yokohama, JP;
Inventor:
Masaki Yanagisawa, Yokohama, JP;
Assignee:
Sumitomo Electric Industries, Ltd., Osaka, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
H01L 21/00 (2006.01);
U.S. Cl.
CPC ...
Abstract
A method for forming a grating with an adjustable pitch and a method for forming a DFB-LD with an optical grating whose pitch is adjustable during the process are disclosed. The method of the invention; first prepares a mold with a pattern to form the grating; second, pushes the mold against the resin as deforming the mold; and third, hardens the mold. The resin with a periodic pattern whose pitch is adjustable during the process is available.