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. 04, 2001
Filed:
Aug. 31, 2000
Niichi Itoh, Tokyo, JP;
Yasunobu Nakase, Tokyo, JP;
Tetsuya Watanabe, Tokyo, JP;
Chikayoshi Morishima, Tokyo, JP;
Mitsubishi Denki Kabushiki Kaisha, Tokyo, JP;
Abstract
Provided is a semiconductor memory having a layout structure in which a memory cell has excellent patterning controllability. A pattern of element components (active regions,to,and,to,and polysilicon regions,to,) of a memory cell for one memory cell unit of a memory cell array region,is identical to that of a dummy cell of a peripheral dummy cell region,and both patterns present a line symmetrical relationship with respect to a boundary line BC,In addition, a pattern of the memory cell for one memory cell unit of the memory cell array region,is identical to that of a dummy cell of a power wiring region,and both patterns present a line symmetrical relationship with respect to a boundary line BC