Method of forming a phase change material layer, method of forming a phase change memory device using the same, and a phase change memory device so formed

摘要

A method of forming a phase change material layer includes preparing a substrate having an insulator and a conductor, loading the substrate into a process housing, injecting a deposition gas into the process housing to selectively form a phase change material layer on an exposed surface of the conductor, and unloading the substrate from the process housing, wherein a lifetime of the deposition gas in the process housing is shorter than a time the deposition gas takes to react by thermal energy.