Patent ID: 8647440
Filing Date: 2014-02-11
Classification: H01J,H01L

Abstract:
1. A substrate processing method comprising the sequential steps of: a) forming a composite product on a surface of a substrate, a silicon oxide film being formed on the surface of the substrate and the composite product being formed of an inorganic material containing silicon oxide and an organic material containing carbon and fluorine; b) irradiating ultraviolet rays on the surface of the substrate to remove at least a part of the organic material until a proportion of the inorganic material in the composite product is greater than that of the organic material in the composite product; and c) supplying hydrogen fluoride steam onto the surface of the substrate to remove at least a part of the inorganic material until a proportion of the organic material in the composite product is greater than that of the inorganic material in the composite product; wherein the irradiating step b) and the supplying step c) are repeated two or more times, wherein, the forming step a) includes the step of etching the silicon oxide film in a predetermined pattern up to the surface of the substrate by using a plasma of a processing gas including an oxygen gas and a gas containing carbon and fluorine, thereby forming the composite product, and wherein the substrate processing method further comprises, after repeating the irradiating step b) and the supplying step c), the step of d) heating the substrate to shrink the organic material that still remains.