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. 11, 2001
Filed:
Jan. 29, 2001
Kouichi Noro, Kawasaki, JP;
Yoshioka Hiroshi, Kawasaki, JP;
Fujitsu Limited, Kawasaki, JP;
Abstract
A semiconductor memory device includes ferroelectric memory cells, cell transistors connected between first nodes of the memory cells and data transfer lines, the memory cells and the cell transistors being grouped into units each corresponding to one or more column addresses, global word lines, one of which is activated in response to selection of a corresponding row address, global plate lines, one of which is activated in response to selection of the corresponding row address, local word lines, each of which is provided and dedicated for a corresponding one of the units, and is connected to gates of the cell transistors, local plate lines, each of which is provided and dedicated for a corresponding one of the units, and is connected to second nodes of the memory cells, and a unit switch circuit which electrically connects the activated one of the global word lines to one of the local word lines in a selected one of the units so as to achieve the same potential therebetween, and electrically connects the activated one of the global plate lines to one of the local plate lines in the selected one of the units so as to achieve the same potential therebetween.