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:
Aug. 21, 2007
Filed:
Oct. 26, 2004
Yoshifumi Yabuki, Miyagi, JP;
Yoshifumi Yabuki, Miyagi, JP;
Sony Corporation, Tokyo, JP;
Abstract
A semiconductor light emitting apparatus is proposed, which has thyristor without increasing number of constituent semiconductor layers, with large degree of freedom of selection of ON voltage. It comprises first-conductivity-type first cladding layer, active layer, and second-conductivity-type second cladding layer on substrate; pair of opposing first recesses forming stripe-patterned ridge configuring major current path, and second recess disposed on outer side of one of first recesses on second cladding layer side, each recesses formed to depth keeping active layer unreached; first-conductivity-type current blocking layer formed over inner surfaces of first and second recesses, and second-conductivity-type contact layer formed on current blocking layer; wherein light emitting portion and thyristor structural portion composed of stack of second-conductivity-type contact layer, first-conductivity-type current blocking layer, second-conductivity-type cladding layer, active layer and first-conductivity-type first cladding layer at second recess are formed; and ON voltage of thyristor is adjustable on selection of depth of second recess.