Patent ID: 8372212
Filing Date: 2013-02-12
Classification: F26B

Abstract:
1. A supercritical drying method for a semiconductor substrate, comprising: cleaning the semiconductor substrate with a chemical solution; rinsing the semiconductor substrate with pure water after the cleaning; changing a liquid covering a surface of the semiconductor substrate from the pure water to alcohol by supplying the alcohol to the surface of the semiconductor substrate after the rinsing; guiding the semiconductor substrate having the surface wetted with the alcohol, into a chamber containing steel use stainless (SUS), an inner wall face of the chamber being subjected to electrolytic polishing; discharging oxygen from the chamber by supplying an inert gas into the chamber; putting the alcohol into a supercritical state by increasing a temperature in the chamber to a critical temperature of the alcohol or higher after the discharge of the oxygen; and discharging the alcohol from the chamber by lowering a pressure in the chamber and changing the alcohol from the supercritical state to a gaseous state.