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:
Dec. 07, 1999
Filed:
Nov. 05, 1997
Tadashi Yamamoto, Kanagawa, JP;
Sony Corporation, Tokyo, JP;
Abstract
An AlGaInP-based semiconductor light-emitting device is of a real-guide type and has excellent crystallinity and excellent laser characteristics. In an AlGaInP-based semiconductor light-emitting device having at least a first conductivity-type first cladding layer (3), an active layer (4) and a second conductivity-type second cladding layer (5), a stripe-shaped ridge (8) is formed on the second cladding layer (5) and first conductivity-type AlGaAs current confinement layers (19) with a band gap larger than that of the active layer (4) and whose refractive index is smaller than that of the active layer are formed so as to bury grooves (7) formed at both sides of the stripe-shaped ridge (8).