Patent ID: 8211242
Filing Date: 2012-07-03
Classification: B08B,H01L,Y10S

Abstract:
1. A substrate processing apparatus comprising: a substrate holding part configured to hold a substrate generally horizontally and rotate the substrate; an upper gas supply nozzle configured and arranged so as to be disposed above the substrate when the substrate is held with the substrate holding part, and configured to supply gas to a top surface of the substrate, the gas containing vapor of a substance that is soluble in water and, when dissolved in water, lowers surface tension of the water; a water supply nozzle configured and arranged so as to be disposed above the substrate when the substrate is held with the substrate holding part, and configured to supply water to the substrate, the water supply nozzle being configured and arranged so as to be disposed outwardly of the upper gas supply nozzle in the radial direction of the substrate; a moving mechanism configured to move the upper gas supply nozzle and the water supply nozzle from a central side of the substrate toward a peripheral side of the substrate while keeping the water supply nozzle located outwardly of the upper gas supply nozzle in the radial direction of the substrate; and a control part configured to control a content, in the gas, of vapor of the substance that, when dissolved in water, lowers the surface tension of the water so that the content of vapor of the substance is higher when the upper gas supply nozzle is on the peripheral side of the substrate than when the upper gas supply nozzle is on the central side of the substrate.