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. 14, 1978
Filed:
Dec. 31, 1975
Applicant:
Inventors:
Theodore William Kwap, Brewster, NY (US);
Ingrid Emese Magdo, Hopewell Junction, NY (US);
Assignee:
International Business Machines Corporation, Armonk, NY (US);
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
H01L / ;
U.S. Cl.
CPC ...
357 50 ; 357 15 ; 357 20 ; 357 36 ; 3072 / ; 3073 / ;
Abstract
Disclosed is a semiconductor structure with an annular collector/subcollector region. The base area with the emitter, is positioned over the collector/subcollector region only, resulting in a smaller base to collector capacitance. Packing density is improved and circuit design flexibility is provided by the ability to change the emitter size without changing the size of the overall structure.