Patent ID: 8497492

Claim:
A variable resistive element comprising: a variable resistor body provided between two electrodes, in which an electrical resistance of between the two electrodes is changed by applying a voltage pulse between the two electrodes; and a bump electrode material making contact with either one of the two electrodes and extending toward the other one of the two electrodes, wherein the bump electrode material is extended along a sidewall of an insulating film formed between the two electrodes, and formed so as to project toward the other one of the two electrodes with an annular or a plurally-separated linear shape, the variable resistor body is formed between a projecting portion of the bump electrode material and the other one of the two electrodes, and has an annular or a plurally-separated linear shape depending on a shape of the bump electrode material, wherein the overall shape of the variable resistor body is annular or a plurally-separated linear shape; and the variable resistor body consists of a material formed by oxidizing the bump electrode material.