Patent ID: 7026257
Filing Date: 2006-04-11
Classification: C23C,H01L

Abstract:
1. A method of producing an insulating film on a silicon wafer, by vacuum ultraviolet CVD, wherein the film is a dielectric film which has a low relative permittivity and which comprises silicon and carbon wherein the method comprises: providing a vacuum ultraviolet CVD apparatus including a vacuum chamber provided with a window; placing a silicon wafer in the vacuum chamber; causing TEOS to flow through the vacuum chamber, which is maintained at a temperature of less than 350° C.; adding O exposing the wafer to light emitted from an excimer lamp through the window which causes decomposition of TEOS and formation of the dielectric film on the wafer; controlling the carbon content of the dielectric film which controls the relative permittivity by the steps consisting essentially of: elevating the temperature in the atmosphere in the chamber, and controlling a distance between the window and the wafer.