Patent ID: 7887636

Claim:
A method of cleaning and drying a substrate, the method comprising: immersing the substrate into a cleaning solution in a cleaning bath vessel; cleaning the substrate in the cleaning solution; extracting the substrate from the cleaning solution; and drying the substrate by producing atomized isopropyl alcohol (IPA) and bubbles of IPA, and supplying the bubbles of IPA, the atomized IPA and one batch of nitrogen gas into the cleaning bath vessel, wherein the producing of the atomized IPA and the bubbles of IPA comprises: supplying another batch of nitrogen gas directly into a body of liquid isopropyl alcohol (IPA) contained in an isopropyl alcohol supply unit, disposed outside the cleaning bath vessel, to thereby produce bubbles of IPA in the isopropyl alcohol supply unit, heating liquid IPA in the isopropyl alcohol supply unit, and spraying the heated liquid IPA directly onto a vibrator of the isopropyl alcohol supply unit to thereby atomize the IPA.