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:
Mar. 31, 2015
Filed:
Apr. 03, 2013
Panasonic Corporation, Osaka, JP;
Yukio Hayakawa, Kyoto, JP;
Kiyotaka Tsuji, Osaka, JP;
Shinichi Yoneda, Kyoto, JP;
Akifumi Kawahara, Kyoto, JP;
Abstract
A method of designing a cross-point non-volatile memory device including memory elements arranged in (N×M) matrix, each of the memory elements including a variable resistance element and a bidirectional current steering element connected in series with the variable resistance element, the method comprises the step of: when an absolute value of a low-resistance state writing voltage is VR and an absolute value of a current flowing through the variable resistance element having changed to a low-resistance state by application of the low-resistance state writing voltage to both ends of the variable resistance element in a high-resistance state is I, and a relationship between a voltage Vapplied to both ends of the bidirectional current steering element and a current I flowing through the bidirectional current steering element is approximated as |V|=a×Log(I)+b, deciding N, M, VR, I, a, and b such that b−VR/2>a×[Log {(N−1)×(M−1)}−Log(I)] is satisfied (S).