Patent ID: 8226771

Claim:
A substrate processing apparatus comprising: a polishing device for polishing a surface of a substrate; an ultrasonic cleaning device for cleaning the surface of the substrate with ultrasonic waves transmitted through a liquid; and a two-fluid jet cleaning device for cleaning the surface of the substrate with a two-fluid jet spouted as a mixture of a gas and a liquid, wherein the ultrasonic cleaning device includes an ultrasonic cleaning rotating mechanism for holding and rotating the substrate in a horizontal plane, the two-fluid jet cleaning device includes a two-fluid jet cleaning rotating mechanism for holding and rotating the substrate in a horizontal plane, and the substrate processing apparatus further comprises a control device for controlling the ultrasonic cleaning rotating mechanism and the two-fluid jet cleaning rotating mechanism so that a rotating speed of the substrate being cleaned with the ultrasonic waves is lower than that of the substrate being cleaned with the two-fluid jet.