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:
Nov. 22, 1988
Filed:
Jan. 29, 1987
Applicant:
Inventor:
Shunichi Muto, Isehara, JP;
Assignee:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
H01L / ; H01L / ; H01L / ;
U.S. Cl.
CPC ...
357 34 ; 357 16 ; 357-4 ;
Abstract
A negative differential resistance element, the characteristics of which can be modulated externally, is provided by a sequential arrangement of an n-type GaAs emitter layer, a non-doped AlGaAs first barrier layer, an n-type GaAs base layer, a second barrier layer of a superlattice composed of coupled non-doped AlAs and GaAs thin layers, and an n-type collector layer. The conductivity of the emitter, base, and collector layers may be changed to p-type.