Apparatus and method for forming thin film
First Claim
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.
1 Assignment
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Accused Products
Abstract
An apparatus for forming a thin film such as a silicon oxide film on a surface of a substrate such as a semiconductor substrate includes: 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 such as TEOS for forming a thin film on the substrate; and a mist-forming device for forming mist of the liquid reaction material and spraying the liquid reaction material onto a surface of the substrate for forming a thin film thereon. The mist-forming device is disposed upstream of the reaction chamber and downstream of the liquid reaction material supplier. Neither of the mist-forming device nor the liquid reaction material supplier includes a heating device for heating the liquid reaction material.
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Citations
11 Claims
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1. An apparatus for forming a thin film on a surface of a substrate, comprising:
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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. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9)
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10. An apparatus for forming a thin film on a surface of a substrate, comprising:
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a reaction chamber having an interior where the substrate is placed when in use;
a liquid reaction material supplier for supplying a liquid reaction material for forming a thin film on the substrate;
a mist-forming device 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 on top of the reaction chamber and downstream of the liquid reaction material supplier;
a flow controller for controlling a flow rate of the liquid reaction material, said flow controller being disposed between the liquid reaction material supplier and the mist-forming device;
a diluent solvent-supplier for controlling the viscosity of the liquid reaction material by adding a diluent solvent at a given rate to the liquid reaction material between the flow controller and the mist-forming device; 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. - View Dependent Claims (11)
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Specification