Patent ID: 8785215
Filing Date: 2014-07-22
Classification: C23C,H01L

Abstract:
1. A method for repairing process-related damage of a dielectric film formed on a substrate caused by processing the dielectric film, wherein the dielectric film has a first dielectric constant before the processing, and the damaged dielectric film has a second dielectric constant which is higher than the first dielectric constant, comprising: (i) adsorbing a first gas containing silicon on a surface of the damaged dielectric film by exposing the surface to the first gas to restore the surface with the first gas without depositing a film in the absence of reactive species, wherein the surface-restored dielectric film has a third dielectric constant which is lower than the second dielectric constant; (ii) adsorbing a second gas containing silicon on a surface of the surface-restored dielectric film by exposing the surface to the second gas, followed by applying reactive species to the second gas-adsorbed surface of the dielectric film, to form a monolayer film thereon, wherein the duration of exposing the surface to the first gas in step (i) is longer than the duration of exposing the surface to the second gas in step (ii); and (iii) repeating step (ii) to accumulate monolayer films to cover the surface of the surface-restored dielectric film.