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. 04, 2008
Filed:
Sep. 08, 2006
Applicant:
Akira Umezawa, Tokyo, JP;
Inventor:
Akira Umezawa, Tokyo, JP;
Assignee:
Kabushiki Kaisha Toshiba, Tokyo, JP;
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
G11C 11/36 (2006.01);
U.S. Cl.
CPC ...
Abstract
The nonvolatile semiconductor memory device according the this invention has a plurality of memory cells arranged in a matrix form and each having a floating gate; at least one first diode connected between drains of said plurality of memory cells and a ground terminal; and at least one second diode connected between sources of said plurality of memory cells and said ground terminal, wherein said first diode and said second diode have a same temperature characteristic. Said first diode and said second diode may be of parasitic diodes, Zener diodes or devices with avalanche breakdown voltages.