Patent ID: 8475623
Filing Date: 2013-07-02
Classification: H01J,H01L

Abstract:
1. A substrate processing system comprising: an atmospheric transfer unit for transferring a substrate to be processed; an accommodating chamber for accommodating therein the substrate and decreasing a pressure therein; a mounting table placed in the accommodating chamber for mounting thereon the substrate; a high-frequency power supply for supplying a high-frequency power to the mounting table; a heat-transfer gas supply line for supplying a heat-transfer gas to a space between the substrate mounted on the mounting table and the mounting table; elevation pins protruded from the mounting table to move up and down the substrate; a pressure control unit for controlling a pressure in the accommodating chamber; a gas flow rate control and supply unit for controlling a flow rate of a desired gas to supply the desired gas into the accommodating chamber; a load-lock chamber, located between the atmospheric transfer unit and accommodating chamber, for loading and unloading the substrate from the atmospheric transfer unit to the accommodating chamber or from the accommodating chamber to the atmospheric transfer unit; a gate valve, allowed to be opened and closed, connecting the load-lock chamber and the accommodating chamber; and a control unit configured to control a substrate processing method, the method including: a first step of transferring the substrate into the accommodating chamber via the atmospheric transfer unit and the load-lock chamber; a second step of mounting the substrate on the mounting table and decreasing the pressure in the accommodating chamber; a third step of supplying the heat-transfer gas to the space between the substrate and the mounting table; a fourth step of etching the substrate; a fifth step of stopping, after the fourth step, a heat-transfer gas supply and removing the heat-transfer gas from the space between the substrate and the mounting table by vacuum-pumping; a sixth step of removing electrostatic charges on the substrate by bringing the substrate into contact with a plasma; and a seventh step of taking out the substrate from the accommodating chamber, wherein in at least one of the first to the seventh step, at least one of operations (a) to (g) is performed: (a) simultaneously performing a vacuum-pumping operation for vacuum-pumping the heat transfer gas supply line and a transferring operation for transferring the substrate into the accommodating chamber, (b) simultaneously performing the transferring operation for transferring the substrate into the accommodating chamber and a pressure-up operation for increasing the pressure in the accommodating chamber by the pressure control unit, (c) simultaneously performing an application stopping operation for stopping an application of the high-frequency power by the high-frequency power supply, a gas supply stopping operation for stopping a supply of the desired gas by the gas flow rate control and supply unit, and the vacuum-pumping operation for vacuum-pumping the heat transfer gas supply line, (d) simultaneously performing a pin protruding operation for protruding the elevation pins, a pressure-down operation for decreasing the pressure in the accommodating chamber by the pressure control unit, and the gas supply stopping operation for stopping the supply of the desired gas by the gas flow rate control and supply unit, (e) simultaneously performing the pressure-up operation for increasing the pressure in the accommodating chamber by the pressure control unit and a mounting table elevating operation for moving up the mounting table, (f) simultaneously performing the pressure-down operation for decreasing the pressure in the accommodating chamber by the pressure control unit and a mounting table moving-down operation for moving down the mounting table, and (g) simultaneously performing the pin protruding operation for protruding the elevation pins and a closing operation for closing the gate valve.