Patent ID: 7572736
Filing Date: 2009-08-11
Classification: H01L

Abstract:
1. A method of dry-etching a semiconductor device, the method comprising: forming a material layer to be etched on a semiconductor substrate; forming photoresist patterns on the material layer using photoresist suitable for an exposure light source having a wavelength equal to or less than about 193 nm loading the semiconductor substrate, on which the photoresist patterns are formed, on a stage in a dry-etching chamber; and dry-etching the material layer with lowering the temperature of the semiconductor substrate to be equal to or lower than a predetermined temperature, wherein dry-etching the material layer with lowering the temperature of the semiconductor substrate comprises: unloading the semiconductor substrate from the dry-etching chamber during the step of dry-etching process; purging the inside of the dry-etching chamber with a purge gas; and loading the unloaded semiconductor substrate into the dry-etching chamber to etch the material layer.