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:
May. 28, 1991
Filed:
Jan. 30, 1990
Masato Okada, Itami, JP;
Abstract
A semiconductor laser device includes an n type Al.sub.x Ga.sub.1-x As first cladding layer disposed on an n type GaAs substrate, an n type Al.sub.y Ga.sub.1-y As (x>y) light guide layer disposed on the first cladding layer, an Al.sub.z Ga.sub.l-z As (y>z) active layer disposed on the light guide layer, a p type Al.sub.p Ga.sub.l-p As second cladding layer disposed on the active layer and including a ridge except in the neighborhood of at least of the cavity facets, an n type GaAs current blocking layer disposed on the second cladding layer but not on top of the ridge, and a p type GaAs contact layer disposed on the current blocking layer and on top of the ridge portion.
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile