Patent ID: 6682629
Filing Date: 2004-01-27
Classification: H01L,Y10S

Abstract:
A processing unit for processing a substrate in a casing, comprising:a transfer port provided in said casing, through which the substrate passes when the substrate is carried into said casing by a carrier for carrying the substrate; and an inflow restricting device for controlling an atmosphere outside said casing to restrict the atmosphere from flowing into said casing through said transfer port; wherein said inflow restricting device has a current regulating plate for regulating in a direction away from said transfer port a gas current of the atmosphere flowing from bottom to top, and wherein said current regulating plate has a bottom part located at a position below said transfer port and has a shape increasingly distant from said casing with ascent from the bottom part toward a top part of said current regulating plate, and wherein said current plate is provided on a shutter for opening/closing said transfer port.