Patent ID: 6192828
Filing Date: 2001-02-27
Classification: C23C,H01J

Abstract:
A thin film forming device for forming a silicon thin film having crystallinity comprising:a film formation chamber container from which gas is exhausted to vacuum;an insulating member;a plasma chamber container which is adjacent to the film formation chamber container via the insulating member so that the plasma chamber container is insulated from the film formation chamber container, wherein at least one of raw material gas and a mixture gas containing raw material gas and inert gas is being introduced into the plasma chamber container;plasma generation means for generating plasma in the plasma chamber container by ionizing the introduced raw material gas;a porous electrode having small pores arranged to partition the plasma chamber container and the film formation chamber container from each other, the electric potential of the porous electrode being the same as that of the plasma chamber container;a base material holder for holding a base material so that the base material can be directed to the porous electrode, the base material holder being arranged in the film formation chamber container to be opposed to the porous electrode; anda pulse power source for impressing a bipolar pulse voltage, in which a positive polarity portion and a negative polarity portion are alternately repeated, between the base material holder and both the plasma chamber container and the porous electrode.