Patent ID: 8120005
Filing Date: 2012-02-21
Classification: H01L

Abstract:
1. A semiconductor device, comprising: a semiconductor substrate; a word line separation layer located directly on the semiconductor substrate having a first hole exposing a part of the semiconductor substrate; a word line located directly on the substrate in the first hole between opposing parts of the word line separation layer; a first interlayer insulating layer located directly on the word line separation layer and the word line, wherein the first interlayer insulating layer has a second hole exposing a predetermined portion of the word line; a diode comprising a first crystalline portion and a second crystalline portion, the first crystalline portion located in the second hole directly on the second crystalline portion and the second crystalline portion located in the second hole directly on the word line and connected to the word line; a cell electrode located directly on the diode and located in the second hole; a lower electrode located directly on the cell electrode and located in the second hole; a phase change material pattern extending into the second hole in contact with the lower electrode; and an upper electrode located directly on the phase change material pattern.