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. 14, 2025
Filed:
Jul. 30, 2021
Seiko Epson Corporation, Tokyo, JP;
Sophia School Corporation, Tokyo, JP;
Hiroyasu Kaseya, Nagano Ken Suwa Gun Fujimi Machi, JP;
Takafumi Noda, Nagano Ken Matsumoto, JP;
Katsumi Kishino, Tokyo to Akiruno, JP;
SEIKO EPSON CORPORATION, Tokyo, JP;
SOPHIA SCHOOL CORPORATION, Tokyo, JP;
Abstract
A light emitting device includes a laminated structure having a plurality of columnar parts, wherein the columnar part includes a first semiconductor layer, a second semiconductor layer different in conductivity type from the first semiconductor layer, and a third semiconductor layer disposed between the first semiconductor layer and the second semiconductor layer, the third semiconductor layer includes a light emitting layer, and the second semiconductor layer includes a first portion, and a second portion which surrounds the first portion in a plan view from a laminating direction of the first semiconductor layer and the light emitting layer, and is lower in impurity concentration than the first portion.