Patent ID: 9550269
Date: 2017-01-24
CPC Classifications: B24B,H01L

Claim:
1. A polishing device that polishes a surface to be polished of an object to be polished by relatively sliding the surface to be polished and a polishing member, comprising: a pressing unit that presses the surface to be polished against the polishing member by pressing a back side of the surface to be polished of the object to be polished; a thickness measuring unit that estimates a remaining film profile of the surface to be polished of the object to be polished during polishing of the object to be polished; and a control unit that controls a pressing force on the back side of the surface to be polished by the pressing unit in accordance with a measurement result by the thickness measuring unit during the polishing of the object to be polished, wherein the control unit controls not only the pressing force by the pressing unit during the polishing of the object to be polished, but also a periphery of the pressing unit affecting a pressing force of the surface to be polished on the polishing member during the polishing, and the control unit calculates a pressing force of the periphery during the polishing using a relationship of the pressing unit and the periphery with a polishing rate of the surface to be polished whose back side is directly pressed by the pressing unit.