Abstract: The present invention is generally directed to a vaporizer with positive liquid shut-off. In one illustrative embodiment, the vaporizer is comprised of a body, a liquid inlet and a carrier gas inlet coupled to the body, a nozzle positioned within the body, the nozzle having at least one opening formed therethrough that defines a vaporized liquid exit, and a positive shut-off valve, a portion of which is adapted to engage the vaporized liquid exit of the nozzle. In another illustrative embodiment, the vaporizer is comprised of a body, a liquid inlet and a carrier gas inlet coupled to the body and a plurality of peltier cells coupled to the body.

Abstract: The present invention is generally directed to a novel gas delivery system for various deposition processes, and various methods of using same. In one illustrative embodiment, a deposition tool comprises a process chamber, a wafer stage adapted for holding a wafer positioned therein, and a gas delivery system positioned in the chamber above a position where a plasma will be generated in the chamber, wherein substantially all of a reactant gas is delivered into the chamber via the gas delivery system. In another illustrative embodiment, the reactant gas exiting the gas delivery system is directed so as to cover substantially all of an area defined by an upper surface of the wafer.