Patent ID: 8945340
Filing Date: 2015-02-03
Classification: H01J,Y10T

Abstract:
1. A plasma processing apparatus comprising: a processing chamber that converts a processing gas introduced from a gas supply source into plasma and performs plasma processing on a target object; an exhaust chamber that communicates with the inside of the processing chamber to exhaust a gas converted into plasma from the processing chamber; a blocking cover that is provided in the exhaust chamber to block communication between the inside of the processing chamber and the inside of the exhaust chamber; a driving mechanism that supports and vertically moves the blocking cover, and wherein the driving mechanism moves the blocking cover vertically between an open position and a closed position, and wherein in said closed position the blocking cover closes and blocks gas flow from the processing chamber to the exhaust chamber, and wherein in the open position gas flow is allowed from the processing chamber to the exhaust chamber; and a seal member having at least one opening therethrough, and wherein the blocking cover contacts the seal member and closes said at least one opening in the closed position, wherein the seal member includes a plurality of openings therethrough, and wherein a plurality of blocking covers are provided, and further wherein each of the blocking covers moves between open and closed positions, and wherein each blocking cover closes and blocks a respective one of the plurality of openings in the closed position.