Patent ID: 6683004
Filing Date: 2004-01-27
Classification: H01L

Abstract:
A method of manufacturing a semiconductor device which has a trench isolation structure on a silicon substrate for isolating a plurality of active regions on said silicon substrate from one another, the method comprising the steps of:forming a first dielectric film and a second dielectric film on said silicon substrate; removing said first and second dielectric films from the areas of said silicon substrate where the trench structures are to be formed; forming the trench structures in the uncovered areas of said silicon substrate; forming an oxide film on said interior surface of the respective trench structures; depositing an oxide film into said respective trench structures by means of CVD; smoothing the surface of said deposited oxide film by removing said deposited oxide film on said silicon substrate through use of chemical-and-mechanical polishing to expose the second dielectric film; after said step of smoothing the surface, removing the second dielectric film to expose the first dielectric film; and after said step of removing t he second dielectric film to expose the first dielectric film, annealing said silicon substrate in inactive gas at a temperature of 900Â° C. or less.