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Technical Examples
The method includes forming an isolation film on a silicon substrate to define an active region; forming an antireflective film on an entire surface of the substrate containing the isolation film; forming a photosensitive film pattern on the antireflective film while exposing a portion of the isolation film or the active region adjacent to the isolation film; etching the antireflective film, the isolation film, and the substrate by using the photosensitive film pattern as an etching mask to recess the active region; performing a light etch treatment on a substrate resultant without removing the remaining photosensitive film pattern, so as to remove a damaged layer and a carbon pollutant formed on a surface of the recessed active region; and removing the remaining photosensitive film pattern and the antireflective film.