Patent ID: 7823241

Claim:
A system for cleaning a wafer, comprising: a first roller base; at least one first chuck roller connected to the first roller base and comprising a first annular groove; a second roller base opposing the first roller base; at least one second chuck roller connected to the second roller base and comprising a second annular groove; a sensing chuck roller connected to the second roller base and comprising a third annular groove corresponding to the first and second annular grooves; and a cleaning member disposed on the second roller base, wherein a circumferential edge of the wafer is positioned in the first and second annular grooves and abuts the cleaning member, and the first and second chuck rollers rotate the wafer, enabling the circumferential edge thereof to rub against the cleaning member, wherein the cleaning member covers the third annular groove and a central axis of the sensing chuck roller tilts to that of the second chuck roller by a predetermined angle.