Patent ID: 7338352

Claim:
A chemical mechanical polishing apparatus comprising: a polishing unit capable of contacting a polishing surface of a wafer; a slurry delivery unit capable of delivering a slurry to the polishing unit, the slurry delivery unit having a first feed line to feed an abrasive at a first velocity v 1 , a velocity-changing member connected to the first feed line, the velocity-changing member changing the first velocity v 1 of the abrasive to a second velocity v 2 different from the first velocity v 1 , a second feed line, connected to the velocity-changing member, to pass an additive through, and a supply line connected to the velocity-changing member to supply the slurry, which is a mixture of the abrasive and the additive, to the polishing unit; and a rotating unit capable of bringing a polishing surface of the wafer into contact with the polishing unit and rotating the wafer against the polishing unit.