US 9,812,201 B2
Electronic device including variable resistance element and method for operating the same
Kyung-Wan Kim, Icheon (KR); and Yong-Taek Park, Icheon (KR)
Assigned to SK HYNIX INC., Icheon (KR)
Filed by SK hynix Inc., Icheon (KR)
Filed on Aug. 4, 2016, as Appl. No. 15/229,044.
Claims priority of application No. 10-2016-0030308 (KR), filed on Mar. 14, 2016.
Prior Publication US 2017/0263317 A1, Sep. 14, 2017
Int. Cl. G11C 13/00 (2006.01)
CPC G11C 13/0097 (2013.01) [G11C 13/0007 (2013.01)] 19 Claims
OG exemplary drawing
 
1. A method of operating an electronic device including a variable resistance element, wherein the variable resistance element switches from a high resistance state to a low resistance state by performing a set operation and switches from the low resistance state to the high resistance state by performing a reset operation, and is fully reset by a first reset voltage applied thereto, the method comprising:
performing the reset operation on the variable resistance element,
wherein the performing of the reset operation comprises:
applying a second reset voltage to the variable resistance element, the second reset voltage having a magnitude smaller than that of the first reset voltage;
determining whether the variable resistance element is mildly reset or not; and
applying a third reset voltage to the variable resistance element when it is determined that the variable resistance element is mildly reset, or terminating the reset operation when it is determined that the variable resistance element is fully reset, the third reset voltage having a magnitude smaller than that of the first reset voltage,
wherein the electronic device includes a plurality of variable resistance elements including the variable resistance element,
wherein a minimum current among a plurality of currents flowing through the plurality of variable resistance elements in the low resistance state is a set current, the set current having a first magnitude,
wherein a maximum current among a plurality of currents flowing through a first plurality of variable resistance elements that is fully reset is a first reset current, the first reset current having a second magnitude,
wherein a maximum current among a plurality of currents flowing through a second plurality of variable resistance elements that is mildly reset is a second reset current, the second reset current having a third magnitude, the third magnitude being greater than the second magnitude, and
wherein, when the variable resistance element is determined to be mildly reset, a current flowing through the variable resistance element has a magnitude between the second magnitude and the third magnitude, the second and third magnitudes being smaller than the first magnitude of the set current.