Patent ID: 9511475
Filing Date: 2016-12-06
CPC Classification: B24B,C25D,H01L

Claim Text:
1. A polishing device comprising: a rotatable polishing platen; a DC power supply having a first terminal and a second terminal; a positive electrode disposed on a center of a polishing pad on a top surface of the rotatable polishing platen, above the top surface of the rotatable polishing platen, the polishing pad being capable of placing a wafer thereon; and a negative electrode disposed on an edge of the top surface of the rotatable polishing platen, wherein the positive electrode is coupled to the first terminal of the power supply and the negative electrode is coupled to the second terminal of the power supply for applying a voltage or an electric field between the positive electrode and the negative electrode to remove byproducts outwardly on a top surface of the polishing pad.