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:
Apr. 30, 2002
Filed:
Jan. 19, 2000
Applicant:
Inventors:
Assignee:
Mitsubishi Denki Kabushiki Kaisha, Tokyo, JP;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
H01L 2/7112 ; G11C 1/604 ; G11C 8/00 ;
U.S. Cl.
CPC ...
H01L 2/7112 ; G11C 1/604 ; G11C 8/00 ;
Abstract
In a memory cell array having sub-bit lines and sub-source lines formed of a diffusion layer, a main bit line is arranged commonly to the sub-bit lines arranged in multiple columns. A memory cell area can be reduced without restrictions by pitch conditions of the main bit lines.