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:
Apr. 14, 1998
Filed:
Apr. 02, 1997
Hiroyuki Okuyama, Kanagawa, JP;
Akira Ishibashi, Kanagawa, JP;
Eisaku Kato, Kanagawa, JP;
Hiroshi Yoshida, Tokyo, JP;
Kazushi Nakano, Tokyo, JP;
Masakazu Ukita, Kanagawa, JP;
Satoru Kijima, Kanagawa, JP;
Sakurako Okamoto, Kanagawa, JP;
Sony Corporation, Tokyo, JP;
Abstract
A II-VI group compound semiconductor light-emitting device can emit light of a short wavelength at room temperature. Operation characteristics, such as current--voltage characteristics and current--light output characteristics can be stabilized and a life of this semiconductor light-emitting device can be extended. The semiconductor light-emitting device comprises a substrate (1), at least a first cladding layer (2) of a first conductivity type, an active layer (3) and a second cladding layer (4) of a second conductivity type, wherein at least the active layer (3) is made of a II-VI group compound semiconductor and the active layer (3) is doped by either or both of n-type and p-type dopants.