Patent ID: 7507985

Claim:
A phase change memory comprising: a substrate; a first layer, in which an insulation layer and a first electrode communicated with a first wiring are formed, formed on a main surface side of the substrate; a second layer in which a phase change recording film is deposited on the insulation layer and the first electrode film; and a third layer, in which a second electrode communicated with a second wiring is formed, deposited on the phase change recording film, wherein the phase change recording film contains at least two of Ge, Sb and Te as constituting elements thereof, and the insulation film contains TiO x N y , TaO x N y , TiSi x O y N z or TaSi x O y N z as a main constituting material thereof, wherein the insulation film comprises a first insulation layer and a second insulation layer located between the first insulation layer and the phase change recording film, and the insulation layer has an average distance between nearest neighbor atoms more closer to an average distance between nearest neighbor atoms of main constituting material of the phase change recording film than an average distance between nearest neighbor atoms of the first insulation layer.