Patent ID: 7413962
Filing Date: 2008-08-19
Classification: H01L

Abstract:
1. A method used to fabricate a semiconductor device, comprising: forming a layer to be etched; depositing a first amorphous carbon layer on the layer to be etched; patterning the first amorphous carbon layer to form an opening therein defined by first and second cross-sectional sidewalls comprising the first amorphous carbon layer; depositing a second amorphous carbon layer such that the second amorphous carbon layer contacts the sidewalls comprising the first amorphous carbon layer; spacer etching the second amorphous carbon layer to form first and second cross-sectional spacers each contacting one of the first and second cross-sectional sidewalls comprising the first amorphous carbon layer; subsequent to forming the first and second cross-sectional spacers, etching the layer to be etched using the first and second amorphous carbon layers as a pattern to form an opening in the layer to be etched; and removing the first amorphous carbon layer and the first and second spacers.