Patent ID: 8047510

Claim:
An evaporation supply apparatus for a raw material, comprising: a source tank in which a raw material is pooled; a flow rate control device that, while regulating a flow rate of a carrier gas G 1 at a constant flow rate from a carrier gas supply source, supplies the carrier gas G 1 into the raw material in the source tank; a primary piping path for feeding a mixed gas G 0 , wherein the mixed gas is made up of raw material vapor G 4 and carrier gas G 1 pooled in an upper space of the source tank; an automatic pressure regulating device that regulates a control valve interposed in a tail end of the primary piping path based on detected pressure and temperature values of the mixed gas G 0 in the primary piping path to regulate the cross-sectional area of a passage through which the mixed gas G 0 is distributed so as to hold the pressure of the mixed gas G 0 inside the source tank at a constant value; and a constant-temperature heating unit for heating to a set temperature the source tank, wherein the mixed gas G 0 is supplied to a process chamber while controlling the pressure inside the source tank.