Patent ID: 6124158
Filing Date: 2000-09-26
Classification: H01L

Abstract:
A process for forming a thin film of dielectric on a semiconductor substrate, said film having reduced carbon contamination, comprising heating the substrate under an inert atmosphere in a suitable reaction chamber to a temperature such that a selected gaseous organic precursor for said dielectric will react to form a bonded reactant on the surface, and carrying out multiple deposition cycles at said temperature to form said thin dielectric film, each deposition cycle comprising:a) introducing the gaseous organic precursor into the reaction chamber so that it reacts to form said bonded reactant on the surface;b) purging the reaction chamber with an inert gas;c) introducing a second gaseous reactant into the chamber which reacts with said bonded reactant to form said dielectric film; andd) purging the reaction chamber with the inert gas,wherein no less frequently than every third cycle, introducing ozone into the reaction chamber following step d) to react with carbon contaminants in the film thereby forming gaseous products and purging the reaction chamber with said inert gas to remove such products prior to initiating the next cycle.