Patent ID: 9073171
Filing Date: 2015-07-07
Classification: B24B

Abstract:
1. A method of polishing a wafer, comprising: attaching a mounting block to which a wafer is bonded, to a pressure plate, a main body of which is mounted with an air bag on one surface thereof and a ring pad on a circumference of the one surface; preparing and mounting a plurality of the pressure plates to which the mounting block is mounted, in close contact with a plate of a polisher; and supplying a polishing solution, to between the plate and the wafer, and polishing one surface of the wafer while adjusting a pressure applied to the mounting block by properly supplying the air into the air bag, wherein the main body of the pressure plate is provided with an inlet pipe and an outlet pipe so as to control supply and discharge of the air with respect to an inside of the air bag, and wherein a pressure applied by the ring pad to the mounting block and a pressure applied by the air bag to the mounting block are compared to each other, and the supply and discharge of the air with respect to the inside of the air bag are controlled so that a uniform pressure is applied throughout the mounting block.