Patent ID: 8258064
Filing Date: 2012-09-04
Classification: C23C,H01L

Abstract:
1. A method of forming a metal silicate layer, comprising: forming the metal silicate layer using a plurality of metal precursors and a plurality of homoleptic silicon precursors, wherein ligands bound to silicon in each of the plurality of homoleptic silicon precursors have the same molecular structure, the plurality of metal precursors and the plurality of homoleptic silicon precursors are not supplied at a same time, remnants of the supplied plurality of metal precursors and homoleptic silicon precursors that have not adsorbed or reacted with an underlying layer of a different composition are purged so as to leave behind a conformal layer on the underlying layer, forming the metal silicate layer includes injecting a reactant gas so that the adsorbed homoleptic silicon precursors, the absorbed metal precursors, and the reactant gas react with one another to form the metal silicate layer, the reactant gas is injected in a total cycle consisting of a first cycle and a second cycle performed after the first cycle, a period of time for the first cycle being shorter than that for the second cycle, and the first and second cycles each include sequentially supplying the plurality of homoleptic silicon precursors, purging, supplying the plurality of metal precursors, purging, supplying the reactant gas and purging.