Patent ID: 6500499
Filing Date: 2002-12-31
Classification: C23C

Abstract:
A process for the deposition of a XSnTi oxide containing thin film from a solventless liquid mixture of X(L)4, Sn(L)4 and Ti(L)4 containing precursors, where X=Zr or Hf, comprising;(a) providing said X(L)4, Sn(L)4 and Ti(L)4 containing precursors in said solventless liquid mixture, wherein L is selected from the group consisting of alkyls, alkoxides, halides, hydrides, amides, imides, azides, cyclopentadienyls, carbonyls, carboxylates, thiolates, nitrates, phosphates, &bgr;-diketonates, &bgr;-ketoiminates, and &bgr;-diiminates; (b) introducing said solventless liquid mixture into a reaction zone and adjacent a substrate upon which said thin film is to be deposited, along with an oxygen containing reactant; (c) depositing said thin film of XSnTi oxide having a dielectric constant greater than 20 on said substrate; (d) annealing said thin film at a temperature in the range of approximately 200-500Â° C., in an anneal gas selected from the group consisting of N2, Ar, He, O2, O3, N2O, NO, H2O, H2O2 and mixtures of thereof.