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Apparatus and method for forming thin film

  • US 6,235,112 B1
  • Filed: 01/26/1999
  • Issued: 05/22/2001
  • Est. Priority Date: 01/26/1998
  • Status: Expired due to Term
First Claim
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1. An apparatus for forming a thin film on a surface of a substrate, comprising:

  • a reaction chamber having an interior where the substrate is placed when in use;

    a liquid reaction material supplier for supplying a given amount of liquid reaction material for forming a thin film on the substrate;

    a mist-forming device having a nozzle for forming mist of the liquid reaction material onto a surface of the substrate for forming a thin film thereon, said mist-forming device being disposed upstream of the reaction chamber and downstream of the liquid reaction material supplier, said nozzle being exposed to the interior of the reaction chamber right above the center of the substrate;

    an electrode disposed around the nozzle wherein the nozzle is insulated from the electrode; and

    a purge gas-supplying device for supplying purge gas at a given flow rate for expelling unused liquid reaction material from the mist-forming device, said purge gas-supplying device being disposed upstream of the mist-forming device and connected thereto.

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