Method and apparatus for forming thin oxide film
Disclosed is a method and apparatus for forming a thin oxide film. The method includes reacting metallic precursors with a reactant, which contains an OH radical, to form the thin oxide film on a substrate.
1. A method for forming a thin oxide film, the method comprising:
forming the thin oxide film on a substrate by reacting metallic precursors with a reactant, which contains an OH radical,
wherein the forming of the thin oxide film comprises:
supplying the metallic precursors to the substrate; and
supplying the reactant, which contains the OH radical, to the substrate,
wherein the supplying of the reactant, which contains the OH radical, to the substrate comprises:
generating the OH radical using ozone and hydrogen peroxide,
wherein the generating of the OH radical comprises:
supplying ozone;
supplying hydrogen peroxide; and
generating the OH radical by reacting the ozone and the hydrogen peroxide,
wherein the supplying of the hydrogen peroxide comprises supplying the hydrogen peroxide that is evaporated from hydrogen peroxide water.
2. The method of claim 1 , wherein the supplying of the ozone comprises supplying gaseous ozone.
3. The method of claim 1 , wherein the supplying of the hydrogen peroxide comprises supplying the hydrogen peroxide that is evaporated from 5% to 100% concentrated hydrogen peroxide water.
4. The method of claim 1 , wherein the forming of the thin oxide film repeatedly comprises the supplying of the metallic precursors to the substrate and the supplying of the reactant, which contains the OH radical, to the substrate.
5. The method of claim 1 , wherein the forming of the thin oxide film comprises:
introducing a substrate into a chamber;
supplying the metallic precursors into the chamber;
supplying a purge gas into the chamber;
supplying the reactant, which contains the OH radical, into the chamber; and
supplying a purge gas into the chamber.
6. The method of claim 1 , wherein the substrate is a silicon substrate or a silicon oxide substrate.
7. The method of claim 1 , wherein the metallic precursors include trimethylaluminum (TMA), tris(dimethylmaino)cyclopentadienyl zirconium, tetrakisdimethylamido titanium (TDMATi), demethyl zinc, tetrakisdiethylamido zirconium (TEMAZr), pentaetoxy tantalum (PET), tetrakisdimethylamido hafnium (TDMAHf), or a mixture.
8. An apparatus for forming a thin oxide film, the apparatus comprising:
a chamber;
a precursor supply part configured to supply metallic precursors into the chamber; and
a reactant supply part configured to supply a reactant, which contains an OH radical, into the chamber,
wherein the reactant supply part comprises:
a first supply part configured to supply ozone; and
a second supply part configured to supply hydrogen peroxide,
an OH-radical generation part connected with the first supply part and the second supply part, and configured to react the ozone with the hydrogen peroxide to generate an OH radical that is to be supplied into the chamber, and
wherein the second supply part supplies hydrogen peroxide that is evaporated from hydrogen peroxide water.
9. The apparatus of claim 8 , wherein the first supply part supplies the ozone in a gaseous state.
10. The apparatus of claim 8 , wherein the second supply part supplies hydrogen peroxide that is evaporated from 5% to 100% concentrated hydrogen peroxide water.
11. The apparatus of claim 8 , wherein the second supply part further comprises a heating unit configured to generate hydrogen peroxide by heating 5% to 100% concentrated hydrogen peroxide water.