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:
Jun. 23, 2015
Filed:
Jul. 14, 2014
Kabushiki Kaisha Toshiba, Minato-ku, JP;
Toshiki Hikosaka, Kanagawa-ken, JP;
Yoshiyuki Harada, Tokyo, JP;
Maki Sugai, Kanagawa-ken, JP;
Shinya Nunoue, Chiba-ken, JP;
KABUSHIKI KAISHA TOSHIBA, Minato-ku, JP;
Abstract
According to one embodiment, a semiconductor light emitting device includes a first semiconductor layer of a first conductivity type and having a major surface, a second semiconductor layer of a second conductivity type, and a light emitting layer provided between the first and second semiconductor layers. The major surface is opposite to the light emitting layer. The first semiconductor layer has structural bodies provided in the major surface. The structural bodies are recess or protrusion. A centroid of a first structural body aligns with a centroid of a second structural body nearest the first structural. hb, rb, and Rb satisfy rb/(2·hb)≦0.7, and rb/Rb<1, where hb is a depth of the recess, rb is a width of a bottom portion of the recess, and Rb is a width of the protrusion.