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:
Jan. 02, 2018
Filed:
Jun. 19, 2014
Applicant:
Hitachi, Ltd., Chiyoda-ku, Tokyo, JP;
Inventors:
Hideo Arimoto, Tokyo, JP;
Kazuki Tani, Tokyo, JP;
Takashi Takahama, Tokyo, JP;
Daisuke Ryuzaki, Tokyo, JP;
Yoshitaka Sasago, Tokyo, JP;
Assignee:
HITACHI, LTD., Tokyo, JP;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
G02F 1/025 (2006.01); G02F 1/225 (2006.01); G02F 1/015 (2006.01); G02F 1/21 (2006.01);
U.S. Cl.
CPC ...
G02F 1/025 (2013.01); G02F 1/2257 (2013.01); G02F 2001/0151 (2013.01); G02F 2001/212 (2013.01); G02F 2202/104 (2013.01);
Abstract
In an optical modulatorof an embodiment, an optical waveguide coreis configured from an ntype semiconductor region, a gate insulating filmon the ntype semiconductor region, and a ptype semiconductor regionon the gate insulating film. Further, a width Wof the ntype semiconductor regionand a width Wof the ptype semiconductor regionare equally formed and are layered without being shifted. Therefore, an optical modulator having stable optical characteristics can be provided.