Patent ID: 6302927
Filing Date: 2001-10-16
Classification: H01L

Abstract:
A wafer treatment apparatus comprising:a wafer cassette having a cassette body provided with an opening in one side thereof for accommodating a wafer, and a lid capable of hermetically closing the opening of the cassette body;a cassette table for supporting the wafer cassette thereon, disposed in a working environment separated from a clean environment by a wall;a normally closed valve disposed at a through hole formed in the cassette body; anda vent pipe capable of being inserted through the valve to allow the interior of the wafer cassette to communicate with the clean atmosphere when the wafer cassette is placed on the cassette table,wherein the wall is provided with a gateway at a position corresponding to the wafer cassette as mounted on the cassette table, the gateway of the wall is closed by a door and the lid of the wafer cassette corresponds to the door of the gateway, and,wherein the through hole is formed in a bottom wall of the cassette body, the valve is placed at the through hole, and the vent pipe has one end part projecting upward from the cassette table.