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:
Dec. 28, 2004
Filed:
Jun. 03, 2003
Hiroshi Nakamura, Kawasaki, JP;
Ken Takeuchi, Tokyo, JP;
Hideko Oodaira, Kuroishi, JP;
Kenichi Imamiya, Kawasaki, JP;
Kazuhito Narita, Yokkaichi, JP;
Kazuhiro Shimizu, Yokohama, JP;
Seiichi Aritome, Yokohama, JP;
Kabushiki Kaisha Toshiba, Kawasaki, JP;
Abstract
A semiconductor memory device includes a memory cell array comprising memory cell units arranged in an array form, first blocks including first memory cell units each having at least one memory cell and at least one selection gate transistor, and second blocks including second memory cell units each having at least one memory cell and at least one selection gate transistor, wherein the first blocks are arranged on both end portions of the memory cell array, the second blocks are arranged in another portion, and a structure of the first memory cell units on the end portions of the memory cell array is different from a structure of the second memory cell units.