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:
Mar. 31, 2026
Filed:
Feb. 28, 2022
Kabushiki Kaisha Toshiba, Tokyo, JP;
Toshiba Electronic Devices & Storage Corporation, Tokyo, JP;
Yuning Tsai, Yokohama Kanagawa, JP;
Yoshiko Takahashi, Yokohama Kanagawa, JP;
Kabushiki Kaisha Toshiba, Kawasaki, JP;
Toshiba Electronic Devices & Storage Corporation, Kawasaki, JP;
Abstract
An optical coupling device includes a leadframe, a light-emitter, a light-receiver, and first to fourth resins. The light-emitter is located on the leadframe. The first resin is located on the leadframe. The first resin includes first and second portions. The first portion surrounds the light-emitter. The second portion is positioned between the first portion and the light-emitter. A first thickness of the first portion is greater than a second thickness of the second portion. The second resin is located between the light-emitter and the light-receiver in the first direction and is light-transmissive. The third resin is located between the second resin and the light-receiver and is light-transmissive. The fourth resin houses the light-emitter, the light-receiver, and the first to third resins and is light-shielding.