Patent ID: 6110286
Filing Date: 2000-08-29
Classification: C23C,C30B,H01L

Abstract:
A vertical processing unit comprising:a cylindrical processing chamber having an opening formed at a bottom portion thereof and an annular bottom surface formed at a periphery of the opening;a disk-shaped cap having an annular abutting-surface abutting on the annular bottom surface of the chamber and a mounting-surface formed on an inside of the annular abutting-surface, said disk-shaped cap being adapted to close the opening of the cylindrical processing chamber; andholder for holding an object to be processed, mounted on the mounting-surface of the cap, wherein:said abutting-surface has an annular groove formed therein;an inert gas supply passageway is provided in communication with the annular groove for supplying an inert gas into a gap between the cylindrical processing chamber and the disk-shaped cap through the annular groove; andan ejection opening for ejecting an inert gas toward an inside of the cylindrical process chamber is provided on an inner side of the annular groove for communicating the annular groove and an interior of the processing chamber.