Patent ID: 8039372

Claim:
A method of manufacturing a phase changeable memory device, the method comprising: forming a contact region on a substrate; forming at least one insulating layer on the substrate, the insulating layer having a diode electrically connected to the contact region; forming a preliminary first electrode on the diode; forming a first electrode on the diode by partially etching the preliminary first electrode; forming an insulating interlayer covering the first electrode on the insulating layer; forming a phase changeable material layer pattern on the first electrode and the insulating interlayer; and forming a second electrode on the phase changeable material layer pattern; wherein forming at least one insulating layer comprises: forming a first insulating layer on the substrate; forming a second insulating layer on the first insulating layer; forming a third insulating layer on the second insulating layer; forming an opening by partially etching the third insulating layer, the second insulating layer and the first insulating layer; and forming the diode partially filling the opening, the diode being electrically connected to the contact region.