Patent ID: 9293183
Filing Date: 2016-03-22
CPC Classification: G11C

Claim Text:
1. A magnetoresistive random access memory comprising: a first memory cell line in which first to Nth memory cells (N is an integer greater than or equal to 2) are formed; and first to (N+1)th write bit lines, wherein the first memory cell line includes a magnetic recording layer formed of a ferromagnetic body, first to (N+1)th magnetization fixed layers coupled to the magnetic recording layer, first to Nth reference layers provided to face the magnetic recording layer, first to Nth non-magnetic spacer layers inserted between the magnetic recording layer and the first to the Nth reference layers, respectively, and first to (N+1)th transistors, the ith reference layer (i ranges from 1 to N) and the ith spacer layer are located between the ith and the (i+1)th magnetization fixed layers, odd-numbered magnetization fixed layers among the first to the (N+1)th magnetization fixed layers have a magnetization fixed to a first direction, even-numbered magnetization fixed layers among the first to the (N+1)th magnetization fixed layers have a magnetization fixed to a second direction opposite to the first direction, the first to the Nth reference layers have a magnetization fixed to the first direction or the second direction, and the ith transistor is provided between the ith write bit line and the ith magnetization fixed layer, wherein data is written to the ith memory cell by flowing a write current between the ith write bit line and the (i+1)th write bit line through the ith and the (i+1)th transistors, and wherein data is written to the jth memory cell (j is an integer greater than or equal to 1 and smaller than or equal to N) by turning on the first to the (N+1)th transistors and then applying a first potential to the first write bit line when j=1, applying the first potential to the first to the jth write bit lines when j>1, applying a second potential different from the first potential to the (N+1)th write bit line when j=N, and applying the second potential to the (j+1)th to the (N+1)th write bit lines when j<N.