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:
Sep. 20, 2005
Filed:
Jul. 29, 2003
Applicants:
Shinsuke Anzai, Tenri, JP;
Yasumichi Mori, Nara, JP;
Hidehiko Tanaka, Nara, JP;
Inventors:
Assignee:
Sharp Kabushiki Kaisha, Osaka, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
G11C016/04 ;
U.S. Cl.
CPC ...
Abstract
A semiconductor memory device is provided, which comprising a memory cell array comprising a two-value memory region and a multi-value memory region, in which the two-value memory region comprises a plurality of memory cells each storing 1-bit data and the multi-value memory region comprises a plurality of memory cells each storing 2 or more-bit data, and a sense amplifier section common to data read of the two-value memory region and data read of the multi-value memory region, for reading data stored in a selected memory cell by comparing a potential of the selected memory cell with a reference potential.