Patent ID: 7858961

Claim:
A phase change memory (PCM) device, comprising: a substrate; a first electrode formed over the substrate; a first dielectric layer formed over the first electrode and the substrate; a plurality of cup-shaped heating electrodes, respectively disposed in a portion of the first dielectric layer; a first insulating layer formed over the first dielectric layer along a first direction, partially covering the cup-shaped heating electrodes and the first dielectric layer therebetween; a second insulating layer formed over the first dielectric layer along a second direction, partially covering the cup-shaped heating electrodes and the first dielectric layer therebetween; a pair of phase change material layers respectively disposed on opposing sidewalls of the second insulating layer, wherein each of the pair of phase change material layers physically contact with one of the cup-shaped heating electrodes thereunder; and a pair of first conductive layers formed on the second insulating layer along the second direction, respectively, wherein one of the first conductive layers contact with one of the phase change material layers.