Patent ID: 7498272
Filing Date: 2009-03-03
Classification: C23C

Abstract:
1. An atomic layer deposition (ALD) process for depositing rare earth metal oxide thin films on a substrate in a reaction space, comprising the steps of: a) feeding a vapor-phase pulse of a rare earth metal source chemical into the reaction space, said metal source chemical being selected from the group consisting of cyclopentadienyl compounds and cyclooctadienyl compounds of the rare earth metal; b) contacting the vapor-phase pulse of the rare earth metal source chemical with the surface of the substrate; c) purging the reaction space with the aid of an inert gas; d) feeding a vapor-phase pulse of an oxygen source chemical into the reaction space; e) purging the reaction space with the aid of an inert gas; and f) repeating steps a) through e) to deposit a thin film consisting essentially of rare earth metal oxide.