Patent ID: 9165644
Filing Date: 2015-10-20
Classification: G11C

Abstract:
1. A method comprising: applying a first ramp voltage from a first voltage to a second voltage over a first time period to a first access terminal of an access device having the first access terminal and a second access terminal, the second access terminal being coupled to a first terminal of a two-terminal resistive switching device, the resistive switching device having the first terminal and a second terminal, the resistive switching device having a first state and a second state; determining whether the resistive switching device changed from the first state to the second state due to the first ramp voltage; and if the resistive switching device did not change from the first state to the second state, applying a second ramp voltage from the second voltage to a third voltage over a second time period to the first access terminal, the second ramp voltage having an opposite slope to the first ramp voltage, wherein the first time period is at least 0.1 times a total time period of the first time period plus the second time period, and the second time period is at least 0.1 times the total time period of the first time period plus the second time period, and wherein the resistive switching device is a conductive bridging memory.