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:
Mar. 01, 1988
Filed:
Feb. 20, 1987
Applicant:
Inventors:
Assignee:
Cornell Research Foundation, Inc., Ithaca, NY (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
H01L / ; H01L / ; H01L / ;
U.S. Cl.
CPC ...
437 22 ; 437 24 ; 437 31 ; 437133 ; 148D / ; 148D / ;
Abstract
A heterojunction transistor doped to form a specially-shaped emitter-base conduction band step or spike is disclosed. The potential barrier is then utilized to accelerate electrons across the base region at the maximum velocity obtainable without scattering electrons to the upper valleys. In this manner the electrons may be transported across the base region virtually without collisions and at a velocity approximately 10 times that of normal electron diffusion across the base region, thus increasing the frequence response of the transistor.