Patent ID: 7166018

Claim:
A method for feeding polishing slurry to a chemical/mechanical polisher, comprising the steps of: preparing a slurry feeding apparatus comprising: a container containing a slurry to be fed to the polisher; a first nozzle for sucking the slurry up from the container; a second nozzle for recovering the slurry back to 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 the part of the slurry back to the second nozzle; a control valve for regulating the flow rate of the slurry, which is now flowing through the first pipe and will be supplied to the third nozzle and the second pipe; and a pump, which is provided for at least one of the first and second pipes for making the slurry flow, adjusting a height of a bottom head of the first nozzle to be no less than a first height from a bottom of the container and no more that a solution level of the slurry and a height of a bottom head of the second nozzle to be no less than a second height from the bottom of the container and no more than the solution level of the slurry; and spraying the slurry from the second nozzle to stir the slurry contained in the container and sucking the slurry up from the container through the first nozzle in the opposite direction that the slurry is sprayed from the second nozzle to feed the slurry to the polisher.