VARIABLE RESISTANCE ELEMENT, SEMICONDUCTOR DEVICE INCLUDING THE VARIABLE RESISTANCE ELEMENT, AND METHOD OF OPERATION THE SEMICONDUCTOR DEVICE

摘要

PURPOSE: A variable resistance element, a semiconductor device including the same, and a method for operating the semiconductor device are provided to improve the reliability of the semiconductor device including the same by increasing a resistance difference between a high resistance state and a low resistance state. CONSTITUTION: The first data is written in a semiconductor device by changing a variable resistance element from the first resistance state to the second resistance state by applying a reset pulse to the variable resistance element(1620). The second data is written in the semiconductor device by changing the variable resistance element from the second resistance state to the first resistance state by applying a set pulse to the variable resistance element. The size of a reset pulse is larger than the size of the set pulse. The second resistance state is larger than the first resistance state.