Methods of forming germanium-antimony-tellurium materials and a method of forming a semiconductor device structure including the same
View Patent ↗A method of forming a material. The method comprises conducting an ALD layer cycle of a first metal, the ALD layer cycle comprising a reactive first metal precursor and a co-reactive first metal precursor. An ALD layer cycle of a second metal is conducted, the ALD layer cycle comprising a reactive second metal precursor and a co-reactive second metal precursor. An ALD layer cycle of a third metal is conducted, the ALD layer cycle comprising a reactive third metal precursor and a co-reactive third metal precursor. The ALD layer cycles of the first metal, the second metal, and the third metal are repeated to form a material, such as a GeSbTe material, having a desired stoichiometry. Additional methods of forming a material, such as a GeSbTe material, are disclosed, as is a method of forming a semiconductor device structure including a GeSbTe material.
1. 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.
2. The method of claim 1 , wherein introducing a reactive germanium precursor and a co-reactive germanium precursor to the ALD reaction chamber comprises introducing the reactive germanium precursor comprising a germanium halide compound or a germanium alkoxide compound to the ALD reaction chamber.
3. The method of claim 1 , wherein introducing a reactive germanium precursor and a co-reactive germanium precursor to the ALD reaction chamber comprises introducing the reactive germanium precursor selected from the group consisting of Ge(II)F 2 , Ge(IV)F 4 , Ge(II)Cl 2 , Ge(IV)Cl 4 , Ge(II)Br 2 , Ge(IV)Br 4 , Ge(II)I 2 , Ge(IV)I 4 , Ge(IV)(OMe) 4 , and Ge(IV)(OEt) 4 to the ALD reaction chamber.
4. The method of claim 1 , wherein introducing a reactive germanium precursor and a co-reactive germanium precursor to the ALD reaction chamber comprises introducing the co-reactive germanium precursor comprising a germanium silyl compound to the ALD reaction chamber.
5. The method of claim 1 , wherein introducing a reactive germanium precursor and a co-reactive germanium precursor to the ALD reaction chamber comprises introducing the co-reactive germanium precursor selected from the group consisting of Ge(II)(trimethylsilyl) 2 , Ge(IV)(trimethylsilyl) 4 , and GeH(trimethylsilyl) 3 , to the ALD reaction chamber.
6. The method of claim 1 , wherein combining the reactive germanium precursor and the co-reactive germanium precursor to form the germanium layer comprises combining the reactive germanium precursor and the co-reactive germanium precursor in the absence of a co-reactant.
7. The method of claim 1 , wherein introducing a reactive antimony precursor and a co-reactive antimony precursor to the ALD reaction chamber comprises introducing the reactive antimony precursor comprising an antimony halide compound or an antimony alkoxide compound to the ALD reaction chamber.
8. The method of claim 1 , wherein introducing a reactive antimony precursor and a co-reactive antimony precursor to the ALD reaction chamber comprises introducing the reactive antimony precursor selected from the group consisting of Sb(V)F 5 , Sb(III)F 3 , Sb(III)Cl 3 , Sb(V)Cl 5 , Sb(III)I 3 , Sb(III)Br 3 , Sb(III)(OMe) 3 , and Sb(III)(OEt) 3 to the ALD reaction chamber.
9. The method of claim 1 , wherein introducing a reactive antimony precursor and a co-reactive antimony precursor to the ALD reaction chamber comprises introducing the co-reactive antimony precursor comprising an antimony silyl compound to the ALD reaction chamber.
10. The method of claim 1 , wherein introducing a reactive antimony precursor and a co-reactive antimony precursor to the ALD reaction chamber comprises introducing the co-reactive antimony precursor comprising Sb(III)(trimethylsilyl) 3 to the ALD reaction chamber.
11. The method of claim 1 , wherein combining the reactive antimony precursor and the co-reactive antimony precursor to form the antimony layer comprises combining the reactive antimony precursor and the co-reactive antimony precursor in the absence of a co-reactant.
12. The method of claim 1 , wherein introducing a reactive tellurium precursor and a co-reactive tellurium precursor to the ALD reaction chamber comprises introducing the reactive tellurium precursor comprising a tellurium halide compound or a tellurium alkoxide compound to the ALD reaction chamber.
13. The method of claim 1 , wherein introducing a reactive tellurium precursor and a co-reactive tellurium precursor to the ALD reaction chamber comprises introducing the reactive tellurium precursor selected from the group consisting of TeCl 4 , TeBr 4 , TeI 4 , Te(IV)(OMe) 4 , and Te(IV)(OEt) 4 to the ALD reaction chamber.
14. The method of claim 1 , wherein introducing a reactive tellurium precursor and a co-reactive tellurium precursor to the ALD reaction chamber comprises introducing the co-reactive tellurium precursor comprising a tellurium silyl compound to the ALD reaction chamber.
15. The method of claim 1 , wherein introducing a reactive tellurium precursor and a co-reactive tellurium precursor to the ALD reaction chamber comprises introducing the co-reactive tellurium precursor selected from the group consisting of Te(II)(trimethylsilyl) 2 or Te(IV)(trimethylsilyl) 4 to the ALD reaction chamber.
16. The method of claim 1 , wherein combining the reactive tellurium precursor and the co-reactive tellurium precursor to form the tellurium layer comprises combining the reactive tellurium precursor and the co-reactive tellurium precursor in the absence of a co-reactant.
17. A method of forming a semiconductor device structure, comprising:
forming a plurality of openings in a substrate, the plurality of openings having a width of less than approximately 100 nm; and
forming a germanium-antimony-tellurium material by atomic layer deposition (ALD) in the plurality of openings, wherein forming the germanium-antimony-tellurium material by atomic layer deposition (ALD) in the plurality of openings comprises:
conducting an ALD layer cycle of a first metal, the ALD layer cycle comprising a reactive first metal precursor and a co-reactive first metal precursor;
conducting an ALD layer cycle of a second metal, the ALD layer cycle comprising a reactive first metal precursor and a co-reactive second metal precursor;
conducting an ALD layer cycle of a third metal, the ALD layer cycle comprising a reactive first metal precursor and a co-reactive third metal precursor; and
repeating the ALD layer cycle of the first metal, the ALD layer cycle of the second metal, and the ALD layer cycle of the third metal to form a germanium-antimony-tellurium material having a desired stoichiometry.
18. The method of claim 17 , wherein forming a germanium-antimony-tellurium material by atomic layer deposition (ALD) in the plurality of openings comprises conformally depositing the germanium-antimony-tellurium material in the plurality of openings.