Patent ID: 7437834

Claim:
A substrate processing method in which a substrate surface is dried by injecting it with dry gas comprising a mixture of an organic solvent vapor and an inert gas, the substrate processing method characterized in that the dry gas is a mixture of inert gas and the organic solvent vapor, wherein the mixed gas is formed by bubbling the inert gas in an organic solvent in a vapor generating unit, wherein the temperature in said vapor generating unit is set at T 1 , the temperature of the mixed gas containing the organic solvent and heated inert gas is set at T 2 from the vapor generating unit to a jet nozzle, and the temperature of heated dry gas emitted from the jet nozzle is set at T 3 , and the temperatures are controlled such that the following relationship holds: T 1 ≦T 2 ≦T 3 ≦boiling point of organic solvent, and the organic solvent mist of submicron size is part of the dry gas emitted from said jet nozzle.