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:
Aug. 12, 2025
Filed:
Jul. 12, 2023
Shinko Electric Industries Co., Ltd., Nagano, JP;
Kazunao Yamamoto, Nagano, JP;
SHINKO ELECTRIC INDUSTRIES CO., LTD., Nagano, JP;
Abstract
A substrate with optical waveguide includes an interconnect substrate and an optical waveguide formed on the interconnect substrate, wherein the optical waveguide includes a first cladding layer, a first protrusion formed on the first cladding layer, the first protrusion having an upper surface and an inclined surface connected to, and sloping relative to, the upper surface, a first metal film formed at least on the inclined surface, a core layer formed on the first cladding layer such as to cover part of the first metal film, and a second cladding layer formed on the first cladding layer such as to cover the core layer, wherein in plan view, a perimeter of a first surface region constituted by both the upper surface and the inclined surface does not have a corner where two lines meet, except for a part thereof where the inclined surface meets the first cladding layer.