Patent ID: 6399208
Filing Date: 2002-06-04
Classification: C09D,C23C

Abstract:
A CVD precursor composition for forming a metal silicate film on a substrate, such precursor composition including a source reagent selected from the group consisting of:(a) single source precursors for forming zirconium silicate thin films, wherein the precursor is a compound or coordinated complex containing Zr, O and Si as constituents thereof; (b) single source precursors for forming hafnium silicate thin films, wherein the precursor is a compound or coordinated complex containing Hf, O and Si as constituents thereof; (c) a precursor mixture comprising (1) a first precursor metal compound or complex including a silicon alcoxide (siloxide) ligand coordinated to a metal M, wherein M=Zr or Hf and (2) a second precursor metal compound or complex including an aliphatic alcoxide ligand coordinated to a metal M, wherein M=Zr or Hf, wherein the relative proportions of the first and second precursors relative to one another are employed to controllably establish the desired M/Si ratio in the deposited silicate thin film; (d) a precursor mixture comprising (1) a first precursor metal compound or complex including a metal M, wherein M=Zr or Hf and (2) a second precursor silicon compound or complex not containing such metal M, wherein the second precursor silicon compound or complex is a gas at STP and wherein the relative proportions of the first and second precursors relative to one another are employed to controllably establish the desired Mx/Si1âˆ’x ratio in the deposited silicate thin film wherein x is from 0.01 to 0.99; (e) a precursor mixture comprising (1) a first precursor metal compound or complex including a metal M, wherein M=Zr or Hf and (2) a second precursor silicon compound or complex additionally containing such metal M, wherein the relative proportions of the first and second precursors relative to one another are employed to controllably establish the desired Mx/Si1âˆ’x ratio in the deposited silicate thin film wherein x is from 0.01 to 0.99; (f) a precursor metal compound or complex including a metal M, wherein M=Zr or Hf, at least one alcoxide ligand and at least one b-diketonate ligand, such precursor metal compound or complex further containing silicon; (g) a precursor metal compound or complex including a metal M, wherein M=Zr or Hf, at least one alcoxide ligand and at least one &bgr;-diketonate ligand comprising a formula: wherein each Râ€² is independently selected from the group consisting of C4-C8 alkyl, halo and C1-C8 haloalkyl, such precursor metal compound or complex optionally further containing silicon; (h) the precursor metal compound or complex (e) further containing silicon, in combination with a second non-silicon-containing precursor metal compound or complex including a metal M, wherein M=Zr or Hf; and (i) compatible mixtures of any two or more of the foregoing species (a)-(h).