Patent ID: 6521047
Filing Date: 2003-02-18
Classification: B01D,C23C

Abstract:
An apparatus for liquid delivery into a chemical vapour deposition CVD installation or into a chemical vapour reaction reactor, comprising:an inlet head equipped with at least one injector or spray nozzle having an inlet for delivery of liquid precursors or precursors in solution; a control circuit to periodically inject droplets of predetermined volume of the liquid precursors or a continuous or pulsed aerosol flow into an evaporation chamber; injection means for injecting a vector gas into said evaporation chamber; heating means designed to heat the evaporation chamber to achieve the change of liquid/vapour state of the liquid precursors, or of the solvent and precursor solution; an outlet tube designed to send the vaporised injected precursors to a reactor of the chemical vapour deposition CVD installation; at least one orifice in a central part of the inlet head for insertion of the injector; a circuit for injection and heating of the vector gas simultaneously with injection of the liquid, the vector gas being directed to the vicinity of the injector; and cooling means for cooling the injector, by at least one of water, coolant flow, and blown air.