Patent ID: 8445885
Filing Date: 2013-05-21
Classification: H01L

Abstract:
1. A nonvolatile memory element comprising: a first electrode; a second electrode; and a resistance variable layer disposed between the first electrode and the second electrode, resistance values of the resistance variable layer reversibly changing in response to electric signals applied between the first electrode and the second electrode, wherein: the resistance variable layer comprises an oxygen-deficient transition metal oxide which is a transition metal oxide and is less in oxygen content which is an atom ratio than an oxide having a stoichiometric composition, at least one of the first electrode and the second electrode includes a platinum-containing layer comprising platinum or a platinum alloy, the oxygen-deficient transition metal oxide in the resistance variable layer includes at least a first oxygen-deficient transition metal oxide layer which is not physically in contact with the platinum-containing layer and a second oxygen-deficient transition metal oxide layer which is disposed between the first oxygen-deficient transition metal oxide layer and the platinum-containing layer and is physically in contact with the platinum-containing layer, x<y is satisfied when an oxygen-deficient transition metal oxide included in the first oxygen-deficient transition metal oxide layer is expressed as MO the platinum-containing layer has a thickness which is not less than 1 nm and not more than 23 nm.