Patent ID: 7559824

Claim:
A chemical mechanical polishing (CMP) device, comprising: a pad conditioner assembly conditioning a polishing pad by supplying a pad conditioning liquid onto the polishing pad and simultaneously transferring a megasonic vibration to the pad conditioning liquid to remove foreign substances from a surface of the polishing pad, the pad conditioner assembly including a first pad conditioner assembly including a first vibrator agitating the pad conditioning liquid supplied on an inner region of the surface of the polishing pad surrounding a center of the surface of the polishing pad, a first oscillator applying a first megasonic vibration energy to the first vibrator, a second pad conditioner assembly including a second vibrator agitating the pad conditioning liquid supplied onto an outer region of the surface of the polishing pad surrounding the inner region, and a second oscillator applying a second megasonic vibration energy to the second vibrator, wherein the CMP device planarizes a wafer, which is mounted to a lower surface of a carrier, by rotating the carrier over the polishing pad attached to an upper surface of a rotating polishing table while supplying a slurry on the polishing pad.