Patent ID: 8147617

Claim:
A substrate cleaning method comprising: performing a two-fluid cleaning liquid process of cleaning a substrate supported on a support member, by supplying a two-fluid cleaning liquid, which has been prepared by changing purified water into mist by an inactive gas, onto a substrate, while rotating the substrate in an essentially horizontal state at a first rotation number, and moving a supply point of the two-fluid cleaning liquid onto the substrate to travel at a speed of 15 to 30 mm/sec in a radial direction of the substrate; finishing the two-fluid cleaning liquid process by stopping supply of the two-fluid cleaning liquid while leaving a liquid film of the two-fluid cleaning liquid on the substrate; then drying the substrate kept supported on the support member, by rotating the substrate with the liquid film present thereon at a second rotation number higher than the first rotation number, without supplying the two-fluid cleaning liquid onto the substrate; and then unloading the substrate from the support member, wherein said drying the substrate and said unloading the substrate are continuously performed in this order directly following said finishing the two-fluid cleaning liquid process and wherein the first rotation number is set to be 300 to 600 rpm.