Patent ID: 7462245
Filing Date: 2008-12-09
Classification: C23C

Abstract:
1. A single-wafer-processing type CVD apparatus for forming a thin film on an object to be processed, which comprises: a reaction chamber; a susceptor for placing said object thereon, which is provided inside said reaction chamber; a shower plate for emitting a jet of reaction gas to said object, which is disposed parallel and opposing to said susceptor; an orifice for bringing a liquid raw material for deposition and a carrier gas into said reaction chamber, which is formed through a ceiling of said reaction chamber; an evaporation plate for vaporizing said liquid raw material, which is disposed in a space between said ceiling of said reaction chamber and said shower plate, said evaporation plate having (i) a vaporization surface which is an external, convex surface facing the ceiling of the reaction chamber, having a center under the orifice, and extending outward toward an outer periphery of the shower plate, (ii) a bottom surface, which is an external surface facing the shower plate, and (iii) an interior defined between the vaporization surface and the bottom surface, said vaporization surface having inlet pores distributed exclusively at its outer periphery, said inlet pores being through-holes penetrating the vaporization surface and opening to the interior, wherein a fluid passage is formed from an exterior of the evaporation plate to the interior of the evaporation plate through the inlet pores, said bottom surface having outlet pores which are through-holes opening to the shower plate, wherein a fluid passage is formed from the interior of the evaporation plate to an exterior of the evaporation plate through the outlet pores; and a temperature controller for controlling said shower plate and said evaporation plate at respective given temperatures.