Patent ID: 7179749
Filing Date: 2007-02-20
Classification: H01L

Abstract:
1. A method for fabricating a semiconductor device, comprising the steps of: forming a silicon nitride layer on a substrate divided into a cell region and a peripheral region; forming a silicon oxynitride layer as an anti-reflective coating layer on the silicon nitride layer; forming a line-type photoresist pattern on the silicon oxynitride layer such that the photoresist pattern in the cell region has a width larger than that of a final pattern structure and the photoresist pattern in the peripheral region has a width that reduces an incidence of pattern collapse; sequentially etching the silicon oxynitride layer and the silicon nitride layer using the photoresist pattern as an etch mask, until widths of a remaining silicon oxynitride layer and a remaining silicon nitride layer are smaller than the width of the photoresist pattern; and over-etching the remaining silicon nitride layer.