Patent ID: 8148197

Claim:
A method of forming a germanium-antimony-tellurium material, comprising: forming a plurality of germanium layers, antimony layers, and tellurium monolayers on a substrate located in an atomic layer deposition (ALD) reaction chamber, wherein: forming a germanium layer of the plurality of germanium layers comprises: introducing a reactive germanium precursor and a co-reactive germanium precursor to the ALD reaction chamber; and combining the reactive germanium precursor and the co-reactive germanium precursor to form the germanium layer; forming an antimony layer of the plurality of antimony layers comprises: introducing a reactive antimony precursor and a co-reactive antimony precursor to the ALD reaction chamber; and combining the reactive antimony precursor and the co-reactive antimony precursor to form the antimony layer; and forming a tellurium layer of the plurality of tellurium layers comprises: introducing a reactive tellurium precursor and a co-reactive tellurium precursor to the ALD reaction chamber; and combining the reactive tellurium precursor and the co-reactive tellurium precursor to form the tellurium layer; and repeating the formation of the plurality of germanium layers, antimony layers, and tellurium layers to form a germanium-antimony-tellurium material having a desired stoichiometry.