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:
Jun. 16, 2009
Filed:
May. 22, 2007
Applicants:
Kazuo Watanabe, Kanagawa, JP;
Hiroshi Sugawara, Kanagawa, JP;
Inventors:
Kazuo Watanabe, Kanagawa, JP;
Hiroshi Sugawara, Kanagawa, JP;
Assignee:
NEC Electronics Corporation, Kanagawa, JP;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
G11C 16/06 (2006.01);
U.S. Cl.
CPC ...
Abstract
A nonvolatile semiconductor memory device includes a memory array and an X-decode section. The memory array includes a plurality of nonvolatile memory cells arranged in a matrix form and a plurality of word lines. The X-decode section selects a selected word line selected from the plurality of word lines, supplies a negative voltage to the selected word line, and supplies a positive voltage to unselected word lines which are not the selected word line, at the time of an erase operation.