Patent ID: 9011605
Filing Date: 2015-04-21
Classification: H01L

Abstract:
1. A substrate cleaning method for performing scrub cleaning of a surface of a substrate, said method comprising: rotating the substrate about a central axis of the substrate; providing a roll cleaning member having nodules on a surface thereof, a first half of the roll cleaning member comprising a first cylindrical portion having a first surface area, and a second half of the roll cleaning member comprising a second cylindrical portion having a second surface area, the first surface area being smaller than the second surface area, and each of the first cylindrical portion and the second cylindrical portion having an axial length greater than a radius of the substrate; wherein a distribution density of the nodules provided on the first cylindrical portion is lower than a distribution density of the nodules provided on the second cylindrical portion; rotating the roll cleaning member; and during said rotating of the roll cleaning member, bringing the first cylindrical portion into contact with the surface of the substrate over an entirety of a forward-direction cleaning area of the substrate whereat a surface of the first cylindrical portion and the surface of the substrate move in the same direction, while bringing the second cylindrical portion into contact with the surface of the substrate over an entirety of an opposite-direction cleaning area of the substrate whereat a surface of the second cylindrical portion and the surface of the substrate move in opposite directions.