Patent ID: 7465675

Claim:
A method of fabricating a phase change memory device, comprising: forming a first insulating layer pattern on a semiconductor substrate; forming a conductive spacer pattern on a sidewall of the first insulating layer pattern; forming a first interlayer insulating layer on the semiconductor substrate having the conductive spacer pattern; planarizing the first interlayer insulating layer and the conductive spacer pattern to form a bottom electrode; etching the bottom electrode to have a top surface of the bottom electrode recessed to be lower than top surfaces of the first interlayer insulating layer and the first insulating layer pattern; forming a second insulating layer pattern on the semiconductor substrate having the recessed bottom electrode, the second insulating layer pattern crossing and directly contacting a top surface of the recessed bottom electrode and exposing a portion of the recessed bottom electrode; forming a phase change material spacer electrically connected to the recessed bottom electrode on a sidewall of the second insulating layer pattern; forming a second interlayer insulating layer on the semiconductor substrate having the phase change material spacer; and planarizing the second interlayer insulating layer and the phase change material spacer to form a phase change material pattern.