Patent ID: 6245151
Filing Date: 2001-06-12
Classification: C23C

Abstract:
A liquid delivery system for vaporization of a liquid precursor to form precursor vapor for transport to a deposition zone, said system comprising:a vaporization chamber;a porous vaporization element positioned in the vaporization chamber to define an upstream portion of the vaporization chamber upstream of the porous vaporization element, and a downstream portion of the vaporization chamber downstream of the porous vaporization element therein;means for heating the vaporization element to sufficient temperature for vaporization of the liquid precursor;means for introducing a liquid precursor to the vaporization element for heating thereof to vaporize the liquid precursor and form precursor vapor;means for discharging precursor vapor for flow thereof to the deposition chamber; andmeans for diverting at least a part of the fluid in the upstream portion of the vaporization chamber past the porous vaporization element, to stabilize fluid pressure in the upstream portion of the vaporization chamber under conditions tending to perturb such fluid pressure.