Patent ID: 7670871

Claim:
A method of fabricating a phase-change memory, comprising: forming a bottom electrode on a substrate; forming a first isolation layer on the bottom electrode, wherein the first isolation layer comprises a plurality of first trenches exposing the bottom electrode, and the first trenches extending in a first extension direction; conformably forming a first phase-change material on the first isolation layer and the substrate, wherein the first phase-change material covers the surface of the first trenches; forming a second isolation layer to fill into the first trenches; subjecting the first isolation layer, the first phase-change material, and the second isolation layer to a planarization process; forming a plurality of first photoresist patterns extending in a second extension direction parallel to the first extension direction, wherein the first photoresist patterns cover the top surface of the first phase-change material and expose the top surface of the second isolation layer formed into the first trenches; and etching the first isolation layer, second isolation layer, first phase-change material, and bottom electrode with the first photoresist patterns as a mask exposing the substrate.