Patent ID: 8192251
Filing Date: 2012-06-05
Classification: B24B,Y10T

Abstract:
1. A pressure control system of a wafer polishing apparatus, comprising: a main input air pressure regulator; an air branch conduit connected to the main input air pressure regulator; a plurality of first pipes, wherein one end of each of the first pipes is connected to the air branch conduit; a plurality of auxiliary air pressure regulators, wherein each of the auxiliary air pressure regulators is connected to another end of one of the first pipes; a plurality of second pipes, wherein one end of each of the second pipes is connected to one of the auxiliary air pressure regulators; and a plurality of air pressure controlling devices, wherein each of the air pressure controlling devices is connected to another end of one of the second pipes, so that the air pressure controlling devices can control a pressure outputted from a polishing head of the wafer polishing apparatus to a surface of a wafer.