Patent ID: 8202683
Filing Date: 2012-06-19
Classification: H01L

Abstract:
1. A method for forming a pattern of a semiconductor device, the method comprising: providing a substrate having a cell region and a peripheral circuit region, the substrate having an underlying layer disposed over the cell region and the peripheral region; forming a mask film and a first photoresist film over the underlying layer of the substrate, the first photoresist film being disposed over the mask film; patterning the first photoresist film to form a first photoresist pattern having a first width in the cell region and a dummy pattern having a second width in the peripheral circuit region, wherein the second width is at least two times larger than the first width, and a space between the dummy pattern and the first photoresist pattern that is adjacent to the dummy pattern is substantially the same as a space between two adjacent first photoresist patterns; forming a spacer over sidewalls of the first photoresist pattern and the dummy pattern; removing the first photoresist pattern and the dummy pattern to form a spacer pattern in the cell region; forming a second photoresist film over the substrate including the spacer pattern; patterning the second photoresist film to form a photoresist pad pattern in the peripheral circuit region; and etching the mask film using the spacer pattern of the cell region and the photoresist pad pattern of the peripheral circuit region as etch masks at least until the underlying layer is exposed, thereby forming a mask pattern.