Patent ID: 6172008
Filing Date: 2001-01-09
Classification: C23C,Y10S

Abstract:
A process for preparing a film formed of an oxide material on a substrate by using an apparatus comprising a vacuum chamber in which an oxidizing gas of O.sub.2 including O.sub.3 is supplied near the substrate so that pressure around the substrate is increased to 5.times.10.sup.-7 to 5.times.10.sup.-6 Torr while maintaining a high vacuum of 1.times.10.sup.-11 to 1.times.10.sup.-9 Torr around an evaporation source and Knudsen cell evaporation sources arranged in the vacuum chamber wherein the substrate is heated, molecular beam of constituent atoms of the oxide excluding oxygen are supplied from the K cell evaporation sources, an oxidizing gas of O.sub.2 including about 70 volume percent O.sub.3 is locally supplied to the vicinity of the substrate and a growing thin film is illuminated by ultraviolet having a wavelength of 150 to 172 nanometers so as to increase the O.sub.3 content of the oxidizing gas.