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:
Sep. 19, 1989
Filed:
Dec. 14, 1987
Applicant:
Inventor:
Yasutake Hirachi, Tokyo, JP;
Assignee:
Fujitsu Limited, Kawasaki, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
H01L / ;
U.S. Cl.
CPC ...
357 16 ; 357 22 ; 357 34 ; 357 51 ; 357 49 ; 357 55 ; 357 58 ;
Abstract
A microwave monolithic integrated circuit (MMIC) device includes a transistor and a capacitor respectively formed on the same semiconductor substrate. The transistor has at least one high resistivity semiconductor layer which forms a heterojunction with an activating layer or the semiconductor substrate. The capacitor has a dielectric layer formed by the high resistivity semiconductor layer of the transistor.