Patent ID: 8450715
Filing Date: 2013-05-28
Classification: G11C,H01L

Abstract:
1. A nonvolatile memory element comprising: an anode electrode; a cathode electrode; a resistance change film provided between the anode electrode and the cathode electrode, and capable of recording information by transitioning between a plurality of states having different resistances in response to at least one of a voltage applied to the resistance change film or a current passed through the resistance change film, the resistance change film including an oxide containing at least one element selected from the group consisting of Hf, Zr, Ni, Ta, W, Co, Al, Fe, Mn, Cr, and Nb; and an impurity element contained in the resistance change film being at least one element selected from the group consisting of Mg, Ca, Sr, Ba, Sc, Y, La, V, Ta, B, Ga, In, TI, C, Si, Ge, Sn, Pb, N, P, As, Sb, Bi, S, Se, and Te, the impurity element having an atomic radius larger than an atomic radius of the element contained in the oxide, and a doping amount of the impurity element being 1×10 wherein a set voltage of the resistance change film is smaller than a reset voltage of the resistance change film, the set voltage changing a state of the resistance change film from a high resistance state to a low resistance state, and the reset voltage changing a state of the resistance change film from the low resistance state to the high resistance state.