Patent ID: 8446756
Filing Date: 2013-05-21
Classification: G11C,H01L

Abstract:
1. A method of driving a storage device including a variable resistance element which includes a pair of electrodes, and in which a resistance value is reversibly changed by applying voltages having polarities different from each other between the pair of electrodes, the method comprising: applying a first pulse voltage for a first time duration between the pair of electrodes causing the variable resistance element to change from a high resistance state in which a resistance value is high to a low resistance state in which a resistance value is low; and applying a second pulse voltage for a second time duration between the pair of electrodes after the first pulse voltage, the second pulse voltage having a different shape from the first pulse voltage and the second time duration ending after a temperature of a conductive path formed between the pair of electrodes decreases to a temperature threshold; wherein the second pulse voltage has a voltage value that is lower than a voltage value of the first pulse voltage; and wherein the second pulse voltage is set to be off, after the temperature of the conductive path is substantially equal to a temperature of the conductive path prior to the application of the first pulse voltage.