Patent ID: 8162298
Filing Date: 2012-04-24
Classification: C23C,Y10S,Y10T

Abstract:
1. A vaporizer comprising: a vaporizing chamber heated by heaters; a primary filter positioned in a bottom end portion of the vaporizing chamber and heated by any of the heaters; a liquid material supply portion arranged to supply a flow-controlled liquid material from an upper portion of the vaporizing chamber through a capillary to the vicinity of a surface of the primary filter; a carrier gas guiding passage for guiding a carrier gas into an underside of the primary filter; a material delivering passage for discharging a mixed gas including the carrier gas and a vaporized liquid material from the vaporizing chamber; a connecting tube for heat isolation provided between the liquid material supply portion and the vaporizing chamber; a carrier gas feeding passage for feeding a small portion of the carrier gas into the liquid material supply portion; and wherein the carrier gas guiding passage has a recess in which the primary filter is positioned, edges of the primary filter contacting walls of the vaporizing chamber, a projection in a central portion of the recess, the projection connecting a central portion of the primary filter and a bottom wall of the vaporizing chamber, and a passage through which the carrier gas is guided to the underside of the primary filter.