Patent ID: 9117773
Filing Date: 2015-08-25
Classification: C23C,H01L

Abstract:
1. A method for forming a thin film comprising oxygen on a substrate in a reaction space by atomic layer deposition, the method comprising a deposition cycle comprising: providing a vapor phase reactant pulse of a first reactant comprising hafnium and/or zirconium to the reaction space such that it forms no more than a monolayer of first reactant on the substrate surface; removing excess first reactant from the reaction space; providing a vapor phase reactant pulse of a second reactant comprising water to the reaction space, such that the partial pressure of water in the reaction space is greater than about 1000 mTorr, wherein the vapor phase reactant pulse of the second reactant comprises an amount of water at least an order of magnitude greater than that required to saturate the substrate surface; and removing excess second reactant and any reaction byproducts from the reaction space, thereby forming a deposited thin film comprising hafnium and/or zirconium and oxygen, and comprising less than 0.5 atomic percent chlorine as deposited.