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. 29, 2020
Filed:
Apr. 09, 2019
Applicant:
Fujitsu Limited, Kawasaki, JP;
Inventors:
Kohei Choraku, Yokohama, JP;
Akiko Matsui, Meguro, JP;
Yoshiyuki Hiroshima, Nakano, JP;
Kazuki Takahashi, Kawasaki, JP;
Tetsuro Yamada, Kawasaki, JP;
Assignee:
FUJITSU LIMITED, Kawasaki, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
G02B 6/122 (2006.01); G02B 6/42 (2006.01); G02B 6/13 (2006.01);
U.S. Cl.
CPC ...
G02B 6/122 (2013.01); G02B 6/4214 (2013.01); G02B 6/13 (2013.01);
Abstract
An optical waveguide substrate includes a substrate that includes a recess, a buffer layer disposed on a bottom surface and a wall surface of the recess, and an optical waveguide disposed inside the recess with the buffer layer interposed therebetween and having a cladding layer disposed on the buffer layer and a core layer disposed inside the cladding layer.