Patent ID: 7036801

Claim:
A vaporizer which comprises a vaporization chamber for a CVD material, a CVD material feed portion supplying the CVD material for the vaporization chamber, and a vaporized gas exhaust port and a heating means for heating the vaporization chamber, wherein said CVD material feed portion comprises passageways for said CVD material and for a carrier gas respectively and the passageway for said CVD material comprises a pressure loss-inducing means for said CVD material, wherein said CVD material feed portion comprises passageways for said CVD material and for a carrier gas and a mixing passageway for joining the foregoing passageways and for connecting to said vaporization chamber; wherein said CVD material feed portion further comprises a passageway exhausting said carrier gas from the outer peripheral of an outlet of said mixing passageway to said vaporizing chamber; wherein said pressure loss-inducing means for said CVD material causes a pressure loss in the CVD material of at least 90% of the total pressure in said CVD material feed portion; wherein said pressure loss-inducing means for said CVD material is a throttle portion or an orifice in said passageway for said CVD material; and wherein an aperture of said throttle portion or said orifice is 0.1 mm or smaller.