Patent ID: 8822966

Claim:
A nonvolatile memory device with a memory cell, the memory cell comprising: a resistance change layer, that switches between a high resistance state and a low resistance state by transfer of metal ions; a first electrode formed on a first side of the resistance change layer; a second electrode formed on a second side of the resistance change layer; and a high permittivity layer formed between the first electrode and the resistance change layer, the high permittivity layer having a higher dielectric constant than at least some portion of the resistance change layer, wherein the first electrode transfers metal ions to the resistance change layer in response to an applied voltage, the resistance change layer comprises: a first layer in contact with the high permittivity layer; and a second layer between the second electrode and the first layer, the second layer having a higher mobility of metal ions than the first layer and a higher dielectric constant than the first layer, and the first layer includes at least one of silicon oxide and silicon nitride, and the second layer includes amorphous silicon.