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:
Nov. 29, 2011
Filed:
Mar. 31, 1998
Tsutomu Takahashi, Tachikawa, JP;
Kouji Arai, Kodaira, JP;
Yasushi Takahashi, Urawa, JP;
Atsuya Tanaka, Tokorozawa, JP;
Shunichi Sukegawa, Plano, TX (US);
Shinji Bessho, Plano, TX (US);
Masayuki Hira, Dallas, TX (US);
Tsutomu Takahashi, Tachikawa, JP;
Kouji Arai, Kodaira, JP;
Yasushi Takahashi, Urawa, JP;
Atsuya Tanaka, Tokorozawa, JP;
Shunichi Sukegawa, Plano, TX (US);
Shinji Bessho, Plano, TX (US);
Masayuki Hira, Dallas, TX (US);
Hitachi, Ltd., Tokyo, JP;
Texas Instruments Inc., Dallas, TX (US);
Abstract
A plurality of sub word lines each have a length equivalent to the division of a main word line along the extension direction thereof, arranged along a bit line crossing said main word line, and are connected with a plurality of memory cells. A first sub word select line arranged in parallel to the main word line is extended to a plurality of sub arrays arranged in the extension direction of the word line. A second sub word select line is connected to the corresponding one of said first sub word select line to be extended orthogonally to a word line driving circuit area of an adjacent sub array. In the sub word line driving circuit provided for each sub array, a sub word line is selected and deselected by signals supplied from said main word line and said second sub word select line.