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.

Date of Patent:
Apr. 13, 2010

Filed:

Apr. 26, 2006
Applicants:

Atsushi Shimaoka, Kashihara, JP;

Hidechika Kawazoe, Kitakatsuragi-gun, JP;

Yukio Tamai, Tsuchiura, JP;

Inventors:

Atsushi Shimaoka, Kashihara, JP;

Hidechika Kawazoe, Kitakatsuragi-gun, JP;

Yukio Tamai, Tsuchiura, JP;

Assignee:
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
G11C 11/00 (2006.01); G11C 11/14 (2006.01); G11C 11/15 (2006.01);
U.S. Cl.
CPC ...
Abstract

A nonvolatile semiconductor storage device is provided with a memory cell selecting circuit which selects a selected memory cell from a memory cell array; and a write voltage applying circuit, which applies a row write voltage and a column write voltage to a selected word line and a selected bit line, respectively, and applies a row write blocking voltage and a column write blocking voltage to an unselected word line and an unselected bit line, respectively, and applies a write voltage sufficient for writing only on both ends of the selected memory cell. The write voltage applying circuit applies a write compensating voltage, which has a polarity opposite to that of the voltage applied on the both ends of the unselected memory cells other than the selected memory cell, on both ends of the unselected memory cells, while the write voltage is applied to the selected memory cell.


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