Patent ID: 8665633
Filing Date: 2014-03-04
Classification: G11C

Abstract:
1. An initialization method of changing a nonvolatile variable resistance memory element from an initial state immediately after manufacturing to a state of being usable as a memory element, the nonvolatile variable resistance memory element including a first electrode and a second electrode and reversibly changing between a high resistance state and a low resistance state according to a polarity of a voltage applied across the first electrode and the second electrode, said initialization method comprising: forming by applying a negative fourth voltage to the second electrode with respect to the first electrode, to decrease a resistance value of the nonvolatile variable resistance memory element that is in the initial state immediately after manufacturing; and performing low resistance stabilization writing by applying a positive voltage to the second electrode with respect to the first electrode to set the nonvolatile variable resistance memory element to the low resistance state, after the negative fourth voltage is applied in said forming.