Patent ID: 7077911

Claim:
An MOCVD apparatus to supply a source gas, as a mixture of an MO source gas, with an oxidizing gas to a substrate to thereby form a film, the apparatus comprising: a substrate holder to hold the substrate; a deposition chamber to house the substrate holder; a supply mechanism to supply the source gas to a surface of the substrate; and a heating device to heat the substrate held by the substrate holder; the deposition chamber including a substrate housing unit to house the substrate holder and a passage housing unit connected to gas supply mechanism, the passage housing unit comprising a plurality of first portions and a plurality of second portions disposed over the substrate alternately, the first portions being formed by a slope of an upside of the deposition chamber and the substrate, and the second portions formed by a substantially or exactly horizontal surface of the deposition chamber and the substrate, the first portions allowing an area of the substrate below them to be exposed to deposition and the second portions preventing an area of the substrate under them from exposure to deposition; the passage having a cross-sectional area that is smaller than an area of a deposition plane of the substrate when the passage housing unit is cut in parallel with the deposition plane of the substrate.