Patent ID: 9307653
Filing Date: 2016-04-05
CPC Classification: B08B,H01L,H05K

Claim Text:
1. A substrate cleaning method for cleaning a surface of a substrate on which circuit patterns are formed, the substrate cleaning method comprising: a liquid film forming process that forms a liquid film on an entire surface of the substrate by supplying a cleaning liquid from a central portion of the substrate toward a peripheral portion thereof while horizontally holding the substrate and rotating the substrate about a central axis of the substrate; a first drying process that forms a drying region by discharging a gas from a gas nozzle onto the surface of the substrate from the central portion of the substrate toward the peripheral portion thereof after supplying the cleaning liquid and by removing the cleaning liquid on the surface of the substrate, while rotating the substrate; and a second drying process that removes the cleaning liquid remaining between the circuit patterns in the drying region after the first drying process by a residual liquid removing device that moves in a diametrical direction of the substrate independently from the gas nozzle, while rotating the substrate, wherein a residual liquid removing position of the residual liquid removing device in the second drying process is located to be spaced apart from a gas discharge position in the first drying process by a distance no smaller than a unit exposure region for forming the circuit patterns in order to suppress non-uniform distribution of the cleaning liquid remaining between the circuit patterns, and said unit exposure region is a region to which light is irradiated through one time exposure by an exposure apparatus.