Patent ID: 7670095
Filing Date: 2010-03-02
Classification: H01L,Y10S

Abstract:
1. A wafer processing apparatus comprising: a chamber that is pressurized to a pressure that is higher than a pressure of an exterior thereof; a first opening portion through which an interior and the exterior of said chamber are in communication with each other, and through which a wafer to be processed is transferred between the exterior to the interior; a door movable into said first opening portion between an open position to open said first opening portion and a close position to close said first opening portion; and an aperture provided to communicate with the interior and the exterior of said chamber in a direction in which said door moves to open or close said first opening portion, wherein when said door is positioned at the close position, said door having an inserted part that is completely inserted into said first opening portion and a non-inserted part that protrudes from an inside wall surface of said chamber around said first opening portion, wherein said aperture includes an area defined by an outer peripheral portion of said first opening portion when said door is inserted into said first opening portion to close said first opening portion and an outer periphery portion of the inserted part of the door, wherein an area of the cross section of the aperture is constant over a wall thickness of said chamber around said first opening portion in the direction in which said door moves to open or close said first opening portion, and wherein the non-inserted part has an extension extending along the inside wall surface of said chamber to block air that comes from outside of said chamber.