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:
Jul. 03, 1979
Filed:
Nov. 18, 1977
Applicant:
Inventors:
Larry R Dawson, Albuquerque, NM (US);
Stephen Knight, Murray Hill, NJ (US);
Assignee:
Bell Telephone Laboratories, Incorporated, Murray Hill, NJ (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
H01L / ;
U.S. Cl.
CPC ...
357 16 ; 357 30 ; 357 61 ; 357 19 ;
Abstract
A symmetric double heterojunction transistor consisting of a lightly doped wide bandgap--heavily doped narrow bandgap--lightly doped wide bandgap structure with the wide bandgap materials having a conductivity type opposite to that of the narrow bandgap material is optically accessed, symmetric with respect to the polarity of applied bias across the transistor and has linear current-voltage characteristics through the origin. A preferred embodiment uses a nGa.sub.1-x Al.sub.x As-pGaAs-nGa.sub.1-x Al.sub.x As structure.