Patent ID: 7779848
Filing Date: 2010-08-24
Classification: B08B,H01L

Abstract:
1. An apparatus for cleaning a semiconductor wafer, comprising: a retaining table having a circular top plan view, said retaining table being capable of retaining a wafer disposed on the top surface thereof and being capable of rotating during cleaning the wafer; a supply unit for supplying a cleaning solution to the top surface of said wafer disposed on said retaining table; a cup member for recovering said cleaning solution supplied to said wafer by said supply unit, said cup member surrounding a radially outer circumference and a bottom of said retaining table; a guard member, being disposed in an inside of said cup member and being spaced apart from said retaining table, said guard member surrounding the radially outer circumference of said retaining table, and a gating unit, which provides opening and closing of said flowing passage; wherein said retaining table retains the wafer so that the side edge of the retaining table and the side edge of the wafer form a common surface, wherein the side edges of said wafer and said retaining table and an inner surface of said guard member define a flowing passage, which is capable of being substantially fulfilled with said cleaning solution during the cleaning of the wafer; and wherein said gating unit provides opening and closing of said flowing passage by moving said guard member toward a radial direction.