Patent ID: 7163197

Claim:
A vaporizer that supplies a vaporized liquid substance to a CVD film deposition device, comprising: an atomization section which sprays a gas/liquid mixture substance consisting of a mixture of a liquid substance which comprises a liquid organometal or an organometal solution and a carrier gas, from an end portion of a transfer conduit; and a vaporization section which vaporizes said sprayed liquid substance, wherein: said transfer conduit is made as a double conduit comprising an internal conduit in which the liquid substance is transferred as a gas/liquid two phase flow and an external conduit into which said internal conduit is inserted keeping a space therebetween and which is provided in order to transfer gas for atomization, the gas for atomization flowing into a first end of the external conduit, through the space, and exiting a second end of the external conduit remote from the first end; an orifice member provided nearer to said second end than to said first end, in which an aperture portion is formed into which said internal conduit is inserted keeping a gap therebetween and the gas for atomization which has been transferred by said external conduit is spouted into said vaporization section through said gap, is provided at an end portion of said internal conduit; the vaporizer further comprises a nozzle ring which is provided at a tip of said atomization section in a vicinity of said end portion of said internal conduit, and upon which a vaporization surface is formed which prevents the liquid substance which has been vaporized from re-condensing; and a cooling member is provided around said transfer conduit in contact with said external conduit and extends to around the end portion of said transfer conduit.