Patent ID: 9024291
Filing Date: 2015-05-05
Classification: H01L

Abstract:
1. A method of fabricating a resistive memory device, the method comprising: forming a first material layer having a first oxidation rate on a semiconductor substrate, on which a bottom structure is formed; forming a second material layer, having a second oxidation rate lower than the first oxidation rate, over the first material layer; patterning the second material layer and the first material layer to form pattern structures; oxidizing surfaces of the pattern structures to form oxide layers; forming an insulating layer on the semiconductor substrate, including the pattern structures having the oxidized surfaces; planarizing the insulating layer to expose an upper surface of the second material layer; forming storage node holes by removing the second material layer and the first material layer from the oxide layers; and forming a data storage material in the storage node holes, wherein an oxide layer on a surface of the first material layer is thicker than an oxide layer formed on a surface of the second material layer.