SUPERCRITICAL DRYING METHOD
First Claim
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1. A supercritical drying method, comprising:
- introducing a semiconductor substrate having a surface wetted with a chemical solution into a chamber;
supplying a supercritical fluid into the chamber;
putting the chemical solution into a supercritical state by adjusting temperature in the chamber to critical temperature of the chemical solution or higher; and
turning the chemical solution in the supercritical state into gaseous matter by lowering pressure in the chamber, and discharging the gaseous matter from the chamber.
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Abstract
According to one embodiment, a semiconductor substrate having a surface wetted with a chemical solution is introduced into a chamber, and a supercritical fluid is supplied into the chamber. The temperature in the chamber is adjusted to the critical temperature of the chemical solution or higher, so that the chemical solution is put into a supercritical state. The pressure in the chamber is then lowered, and the chemical solution in the critical state is turned into gaseous matter. The gaseous matter is then discharged from the chamber.
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9 Claims
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1. A supercritical drying method, comprising:
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introducing a semiconductor substrate having a surface wetted with a chemical solution into a chamber; supplying a supercritical fluid into the chamber; putting the chemical solution into a supercritical state by adjusting temperature in the chamber to critical temperature of the chemical solution or higher; and turning the chemical solution in the supercritical state into gaseous matter by lowering pressure in the chamber, and discharging the gaseous matter from the chamber. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9)
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Specification