Patent ID: 7393742
Filing Date: 2008-07-01
Classification: H01L

Abstract:
1. A method of fabricating a semiconductor device having a capacitor, comprising: forming on a semiconductor substrate a first insulating layer having a first contact hole exposing the semiconductor substrate; forming a contact plug in the first contact hole; forming a buffer conductive layer pattern on the contact plug and the first insulating layer; forming a sacrificial layer pattern on the buffer conductive layer pattern; forming an etching stopping layer on the sacrificial layer pattern; forming a second insulating layer on the etching stopping layer; forming a second contact hole by etching portions of the second insulating layer and the etching stopping layer to expose a portion of the sacrificial layer pattern; removing a portion of the sacrificial layer pattern to expose the buffer conductive layer pattern and form a gap between the etching stopping layer and the buffer conductive layer pattern; and forming a capacitor lower electrode in the second contact hole and the gap.