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. 06, 1985
Filed:
Aug. 24, 1982
Applicant:
Inventors:
Assignee:
Handotal Kenkyu Shinkokai, , JP;
Primary Examiner:
Int. Cl.
CPC ...
H01S / ;
U.S. Cl.
CPC ...
372 50 ; 357 17 ; 357 22 ; 357 41 ; 372 46 ;
Abstract
A semiconductor laser includes an anode region of a first conductivity type made of a highly doped region, an active layer adjacent the anode region, a channel region made of a high-resistivity region and adjacent the active layer, a cathode region of a second conductivity type at one end of the channel region which is made of a highly doped region, and a gate region that surrounds at least part of said channel region and which is made of a highly doped region of the first conductivity type. The anode region and channel region have a wider band gap than that of the active layer.