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:
Feb. 13, 2007
Filed:
Feb. 15, 2005
Akihiko Sano, Joyo, JP;
Shuichi Misuimi, Nara, JP;
Akihiko Hatamura, Uji, JP;
Naru Yasuda, Uji, JP;
Hayami Hosokawa, Tsuzuki-gun, JP;
Akihiko Sano, Joyo, JP;
Shuichi Misuimi, Nara, JP;
Akihiko Hatamura, Uji, JP;
Naru Yasuda, Uji, JP;
Hayami Hosokawa, Tsuzuki-gun, JP;
Omron Corporation, Kyoto, JP;
Abstract
In the upper face of a lower clad layer, a core trench is formed having a cross-sectional trapezoidal shape having a narrow bottom face and a wide upper face, a core is formed within the core trench, and an upper clad layer is formed at the upper face of the core for sealing. The bottom face of the core trench becomes a low refractive index layer having a refractive index smaller than the lower clad layer. The substantive difference of refractive index between the core and the lower clad layer is thus increased.