Patent ID: 7396751
Filing Date: 2008-07-08
Classification: H01L

Abstract:
1. A method for manufacturing a semiconductor device, the method comprising: forming an insulating film over a semiconductor substrate including a gate and a bit line; etching the insulating film to form a first insulating film pattern having a height of using a contact mask for a storage node; forming a hard mask layer over a resulting structure including the first insulating film pattern, the hard mask layer being configured to be an etch stop layer and an anti-reflective layer; forming a photoresist pattern over the hard mask layer using the contact mask for the storage node; etching the hard mask layer and the first insulating film pattern, the first insulating film pattern to have a step, thereby defining a second insulating film pattern; removing the photoresist pattern and the hard mask layer to expose the second insulating film pattern, the second insulating film pattern defining a thorough hole that exposes the bit line; forming a spacer on a sidewall of the second insulating film pattern; and forming a storage node contact plug within the thorough hole.