Patent ID: 8125021
Filing Date: 2012-02-28
Classification: G11C,H01L

Abstract:
1. A non-volatile memory device, comprising: a lower electrode; a single, first oxide layer including ruthenium (Ru) oxide or zinc (Zn) oxide directly formed on the lower electrode; a single, second oxide layer including nickel (Ni) oxide for ohmic contact directly formed on the first oxide layer, and having variable resistance characteristics; a buffer layer including a p-type oxide for ohmic contact formed on the second oxide layer, wherein a first ohmic contact is formed at an interface between the second oxide layer and the buffer layer; and an upper electrode formed on the buffer layer, wherein a second ohmic contact is formed at an interface between the buffer layer and the upper electrode, wherein the buffer layer includes at least one material selected from NiO the upper electrode is composed of a metal having a work function lower than that of a noble metal.