Patent ID: 7608549
Filing Date: 2009-10-27
Classification: C23C,H01J,H01L

Abstract:
1. A method for depositing a film on a semiconductor substrate, the method comprising: providing a substrate with a surface comprising regions with different levels of accessibility; providing a sequence of at least two different reactants in temporally separated and alternating reactant pulses, wherein at least one of the at least two different reactants is provided through a showerhead or otherwise provided in that it impinges vertically on the substrate; selecting plasma-enhanced atomic layer deposition (PEALD) conditions to achieve self-satuaration and self-limiting atomic layer deposition (ALD) mode deposition on the most accessible regions on the substrate surface and depletion effects in less accessible regions on the substrate surface; and exposing the semiconductor substrate to the sequence of the reactant pulses with the selected temporal separations and durations to deposit the film.