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. 14, 2006
Filed:
Oct. 07, 2003
Applicants:
Fabio Pellizzer, Follina, IT;
Giulio Casagrande, Vignate, IT;
Roberto Bez, Milan, IT;
Inventors:
Assignees:
STMicroelectronics S.r.l., Agrate Brianza, IT;
Ovonyx, Inc., Boise, ID (US);
Primary Examiner:
Int. Cl.
CPC ...
H01L 27/102 (2006.01);
U.S. Cl.
CPC ...
Abstract
A cell array is formed by a plurality of cells each including a selection bipolar transistor and a storage component. The cell array is formed in a body including a common collector region of P type; a plurality of base regions of N type, overlying the common collector region; a plurality of emitter regions of P type formed in the base regions; and a plurality of base contact regions of N type and a higher doping level than the base regions, formed in the base regions, wherein each base region is shared by at least two adjacent bipolar transistors.