Patent ID: 8318252

Claim:
An ALD process for making a germanium-antimony-tellurium alloy film comprising the steps of: a) introducing into a deposition chamber an aminogermane with the general formula: where R 1 and R 2 are individually in chain, branch or cyclic alkyl groups with 1 to 10 carbons, to form a molecular layer of aminogermane on the surface of the substrate; b) introducing into the deposition chamber a tellurium precursor selected from the group consisting of: where R 1 , R 2 , R 3 , R 4 , R 5 , and R 6 are independently hydrogen, alkyl groups having 1 to 10 carbons in linear, branched, or cyclic forms with or without double bonds, or aromatic groups, to react with the aminogermane layer to form a Te layer comprising Te-Ge bonds, wherein the Te comprises silyl substituents; reacting the silyl substituents on the Te with an alcohol having the general formula of ROH, where R is an alkyl group with 1 to 10 carbon atoms in a linear, branched, or cyclic form, or an aromatic group, to form Te-H bonds; d) introducing into the deposition chamber a silylantimony precursor selected from the group consisting of: where R 2-10 are individually a hydrogen atom, an alkyl group or alkenyl group with 1 to 10 carbons as chain, branched, or cyclic, or an aromatic group; R 1 is individually a hydrogen atom, an alkyl group or alkenyl group with 2 to 10 carbons as chain, branched, or cyclic, or an aromatic group; R 11 and R 12 are individually an alkyl group or alkenyl group with 1 to 10 carbons as chain, branched, or cyclic, or an aromatic group, to form an Sb layer on top of the Te layer, wherein the Sb comprises silyl substituents; and reacting the silyl substituents on the Sb with (i) water and/or (ii) an alcohol having the general formula of ROH, where R is an alkyl group with 1 to 10 carbon atoms in a linear, branched, or cyclic form, or an aromatic group, to form Sb-H bonds..