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:
Oct. 12, 2010
Filed:
Nov. 29, 2006
Applicants:
Noboru Shibata, Kawasaki, JP;
Kazunori Kanebako, Yokohama, JP;
Inventors:
Noboru Shibata, Kawasaki, JP;
Kazunori Kanebako, Yokohama, JP;
Assignee:
Kabushiki Kaisha Toshiba, Tokyo, JP;
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
G11C 16/04 (2006.01);
U.S. Cl.
CPC ...
Abstract
In a memory cell array, a plurality of memory cells which store data in the form of n values (n is a natural number which is not smaller than 2) which are in first and second to nth states are arranged in a matrix form. Before a write operation of storing data in a first memory cell in the memory cell array, when at least one second memory cell which is adjacent to the first memory cell is in the first state and does not reach a first threshold voltage, a control circuit performs a write operation in the second memory cell up to the first threshold voltage.