Patent ID: 7249995

Claim:
A slurry feeding apparatus for feeding polishing slurry to a chemical/mechanical polisher, the apparatus comprising: a container for storing the slurry therein, a first nozzle for sucking the slurry up from the container; a second nozzle for spraying the slurry into the container; a third nozzle for dripping the slurry in the polisher; a first pipe, which is connected to the first and third nozzles for delivering the slurry to the polisher; a second pipe, which is connected to the second nozzle and the first pipe for bypassing at least part of the slurry flowing through the first pipe from the third nozzle and then recovering that part of the slurry back to the second nozzle; a control valve for regulating the flow rate of the slurry, which is flowing through the first pipe and supplied to the third nozzle and the second pipe; and a pump, provided for at least one of the first pipe and the second pipe for making the slurry flow under pressure, wherein the second nozzle sprays the slurry into the container from a position that is set to be no less than a predetermined level from a bottom of the container and no more than a solution level of the slurry to stir the slurry.