Patent ID: 7580109
Filing Date: 2009-08-25
Classification: G03F,H01L

Abstract:
1. A substrate supporting unit, comprising: a supporter for supporting a substrate; and a temperature controller for controlling a temperature of the supporter, wherein the supporter includes: one or more liquid supply openings opened at a top surface of the supporter, liquid being supplied between the substrate and the supporter through the liquid supply openings; one or more liquid discharge grooves formed in the top surface of the supporter near the liquid supply openings, the liquid between the substrate and the supporter being discharged through the liquid discharge grooves; and one or more liquid discharge openings opened in the liquid discharge grooves, the liquid being discharged through the liquid discharge openings, wherein the supporter includes one or more exhaust grooves, formed in the top surface of the supporter, for attaching the substrate onto the top surface of the supporter; and one or more exhaust openings opened in the exhaust grooves, the exhaust grooves and the exhaust openings serving as the liquid discharge grooves and the liquid discharge openings, respectively, and wherein the liquid supply openings are opened at the top surface of the supporter and are separate from the liquid discharge grooves.