Patent ID: 7913702

Claim:
A substrate cleaning apparatus for cleaning a backside of a substrate on a front surface of which a predetermined processing is performed, the apparatus comprising: an airtight cylindrical chamber; a grip arm unit for supporting the substrate in the chamber such that the backside of the substrate faces a bottom surface of the chamber; a unit for supplying a two phase substance to the backside of the substrate and generating a flow of the substance near the backside of the substrate; at least one ultrasonic vibrator for generating ultrasonic vibrations and transmitting the ultrasonic vibrations to the substrate; at least one DC power supply for applying DC voltages to the substrate to generate electromagnetic stress acting on the backside of the substrate; at least one heating lamp for irradiating heat rays on the front surface of the substrate to apply a thermophoretic force to particles adhered to the backside of the substrate, the thermophoretic force being from the substrate toward a wall surface of the chamber; and a controller configured to control said unit for supplying the two phase substance, the ultrasonic vibrator, the DC power supply and the heating lamp, such that generation of the ultrasonic vibrations by the ultrasonic vibrator, application of the DC voltages by the DC power supply and irradiation of the heat rays by the heating lamp are carried out concurrently with supply of the two phase substance to the backside of the substrate to facilitate removal of the particles from the backside of the substrate, wherein the controller is configured to control an inner pressure of the chamber to be a specific value such that the flow of the two phase substance near the backside of the substrate becomes a viscous flow.