Patent ID: 8168001

Claim:
A film-forming apparatus, which comprises: a film-forming chamber as a vacuum chamber equipped with a stage for placing and supporting a substrate in an interior thereof, a mixing chamber for forming a mixed gas comprising a raw gas and a reactive gas and connected to said film-forming chamber, wherein said mixing chamber is provided directly on an upper surface of said film-forming chamber and is provided separately and distinctly with a first pipe for introducing said raw gas therein and a second pipe for introducing said reactive gas therein, a vaporization chamber for vaporizing a raw material, and a gas head for introducing said mixed gas into said film-forming chamber, said gas head being disposed directly between said mixing chamber and said film-forming chamber opposite to said stage, wherein said gas head spans an opening defined at a bottom of said mixing chamber, seals said mixing chamber, is directly attached to said mixing chamber, and is located on the upper surface of said film-forming chamber, wherein particle traps whose temperature can be controlled are disposed and positioned between said vaporization chamber and said mixing chamber and within said mixing chamber on a downstream side of said mixing chamber, respectively, wherein introduction ports of said first pipe and said second pipe oppose each other in said mixing chamber and lie on a common line extending between a center axis of each introduction port and connecting said gas introduction ports, and said raw gas flowing from said first pipe collides and mixes with said reactive gas flowing from said second pipe, wherein said stage is enclosed with a cylinder-shaped sleeve member having a predetermined length, wherein said mixing chamber includes a stirring compartment equipped with said first and second pipes penetrating an upper wall of said stirring compartment and a diffusion compartment for diffusing said mixed gas, wherein a partition plate provided with a gas blow-off port is disposed between said stirring compartment and said diffusion compartment such that a volume of said diffusion compartment is larger than that of said stirring compartment, said first and second pipes penetrating said upper wall of said stirring compartment at positions directly opposing a central portion of said partition plate, and wherein said gas blow-off port is provided at a desired position below the line connecting said gas introduction ports and at the rear of one of said gas introduction ports.