Patent ID: 7655568
Filing Date: 2010-02-02
Classification: H01L

Abstract:
1. A method for manufacturing a semiconductor device, the method comprising: (a) sequentially forming an underlying layer, a hard mask layer, an anti-reflection film, and an Si-containing first photoresist film over a semiconductor substrate; (b) forming a first photoresist pattern by exposing and developing the first photoresist film using a first exposure mask; (c) performing O (d) forming a second photoresist film over the O (e) etching the anti-reflection film with the first and second photoresist patterns as a mask, thereby forming an anti-reflection pattern; and (f) forming a hard mask pattern by etching the hard mask layer with the anti-reflection pattern as a mask, and etching the underlying layer with the hard mask pattern as a mask, thereby forming an underlying pattern.