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:
Feb. 21, 1989
Filed:
Jun. 25, 1987
Applicant:
Inventors:
Borge Vinter, Paris, FR;
Armand Tardella, Montigny, FR;
Assignee:
Thomson-CSF, Paris, FR;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
H01L / ;
U.S. Cl.
CPC ...
357 22 ; 357 58 ; 357 16 ; 357-4 ;
Abstract
A heterojunction semiconductor device which has a dual channel with a high mobility layer, a barrier layer and a low mobility layer. The barrier layer is thin enough for the carriers to pass from the low mobility layer to the high mobility layer by tunnel effect, during variations of the polarization electrical field of the dual channel. The device can be used as field effect transistors with a quick response time, without variation in the charge of the channel but with a variation in the mobility of the carriers; or as negative transconductance devices for oscillators or complementary transistors in integrated circuits.