Substrate processing apparatus and substrate processing method

A substrate processing method using a substrate processing apparatus comprising a housing for forming a treatment space where a substrate is processed, a substrate supporter mounted in the treatment space to rotate about a rotational axis, and provided to support the substrate, a liquid chemical supplier provided above the substrate supporter to eject a liquid chemical toward an upper surface of the substrate supported by the substrate supporter, and an ejector provided at a side of the treatment space to eject a heat transfer medium with a temperature different from the temperature of the liquid chemical onto the substrate,

• the substrate processing method comprising:
• a substrate loading step for loading the substrate into the treatment space of the housing so as to be supported by the substrate supporter;
• a heat transfer medium ejection step for ejecting the heat transfer medium with the temperature different from the temperature of the liquid chemical onto the substrate;
• and
• a liquid chemical ejection step for supplying the liquid chemical toward the upper surface of the substrate.

A substrate processing apparatus comprising:

• a housing for forming a treatment space where a substrate is processed;
• a substrate supporter mounted in the treatment space to rotate about a rotational axis, and provided to support the substrate;
• a liquid chemical supplier provided above the substrate supporter to eject a liquid chemical toward an upper surface of the substrate supported by the substrate supporter;
• and
• an ejector provided at a side of the treatment space to eject a heat transfer medium with a temperature relatively higher than the temperature of the liquid chemical onto the substrate,
• wherein the ejector is provided at an upper portion of the housing to eject the heat transfer medium toward an upper surface of the substrate supported by the substrate supporter, or provided on the substrate supporter to eject the heat transfer medium toward a lower surface of the substrate supported by the substrate supporter,
• wherein the heat transfer medium comprises a gas or a liquid, the gas comprising nitrogen gas (N2) or an inert gas and the liquid comprising deionized (DI) water or a solvent component of the liquid chemical,
• wherein the substrate supporter comprises a heater embedded to heat the substrate, and
• wherein the substrate processing apparatus further comprises a controller electrically connected to the liquid chemical supplier and the ejector to receive heat transfer medium ejection timing information from the ejector and to apply a control signal to the liquid chemical supplier based on the heat transfer medium ejection timing information so as to control the liquid chemical supplier to eject the liquid chemical.