Patent ID: 6730368
Filing Date: 2004-05-04
Classification: C23C,H01L

Abstract:
A method of preparing a poly-crystalline silicon film comprising:supplying reactive gases and carrier gases to a process chamber of a plasma chemical deposition system including a substrate; depositing an amorphous silicon film on the substrate by plasma discharging at a temperature 400Â° C. or more; after film deposition, transporting the substrate from the process chamber to a heating chamber attached to the plasma chemical deposition system without exposing the substrate to atmosphere external to the system and holding the substrate in the heating chamber to carry out dehydrogenation treatment of the amorphous silicon film; removing the substrate from the heating chamber after the dehydrogenation treatment; and irradiating the amorphous silicon film with a laser beam thereby changing the amorphous silicon film into a poly-crystalline silicon film.