Patent ID: 11969858
Assignee: EBARA CORPORATION
Field: Machine tools (Mechanical engineering)
Classification: CPC B  H | IPC B  H

Claim 0:
1. A substrate processing apparatus for processing a substrate, comprising:
a polishing pad for polishing the substrate;
a substrate holding unit for holding the substrate and pressing the substrate against the polishing pad;
an elastic membrane that is attached to the substrate holding unit and holds a surface opposite to a polishing surface of the substrate;
at least one strain sensor that is fitted to the elastic membrane, measures strain of the elastic membrane, and includes a storage unit for storing strain information and a communication unit;
a detector that is provided in a neighborhood of the elastic membrane and reads and writes information from and into the strain sensor fitted to the elastic membrane; and
a control device that is connected to the detector and sets a processing condition in the substrate processing apparatus based on the strain information of the elastic membrane read from the strain sensor; and
a jetting unit configured to jet gas or liquid to a side wall of the elastic membrane at a boundary between the elastic membrane and the substrate in order to peel the polished substrate from the elastic membrane;
wherein the control device adjusts pressure in a pressure chamber based on the strain information of the elastic membrane so that the gas or the liquid from the jetting unit is jetted to the boundary.