Patent ID: 9375821
Filing Date: 2016-06-28
CPC Classification: B23H,B24B,H01L

Claim Text:
1. A polishing pad, comprising: a base plate; a main polishing body, made from a non-conductive material and disposed on a top surface of the base plate, wherein the main polishing body comprises a plurality of cavities thereon; a plurality of metal bottom portions disposed in the cavities respectively and disposed on the top surface of the base plate wherein each of the cavities comprises one of the metal bottom portions therein, and a plurality of edge positions of the metal bottom portions do not contact the main polishing body respectively and each metal bottom portion does not contact the main polishing body; a positive electrode conductive wire electrically connected to a positive electrode of a power supply; and a negative electrode conductive wire electrically connected to a negative electrode of the power supply; wherein the positive electrode conductive wire and the negative electrode conductive wire alternatively pass through the base plate and electrically connect to the metal bottom portions respectively in the cavities.