Patent ID: 7599216
Filing Date: 2009-10-06
Classification: H01L,Y10S

Abstract:
1. A method for fabricating a phase change memory device, the method comprising: providing a substrate having a first electrode pattern; forming a first insulation layer on the substrate to cover the first electrode pattern; patterning the first insulation layer to form an opening exposing a portion of the first electrode pattern; forming a phase change material layer with a first thickness on the first insulation layer to cover a sidewall of the opening and on the portion of the first electrode pattern; depositing a protective layer with a second thickness on the phase change material layer; etching the protective layer and the phase change material film in sequence until exposing the upper surface of the first insulating layer to thereby form a phase change material pattern; depositing a second insulation layer to cover the first insulation layer on the semiconductor substrate; planarizing the second insulation layer to expose an upper surface of the phase change material pattern; and forming a second electrode on the second insulation layer to contact a portion of the phase change material pattern.