Patent ID: 7074722
Filing Date: 2006-07-11
Classification: H01L

Abstract:
1. A method for fabricating a semiconductor device, comprising the steps of: (a) forming a semiconductor substrate structure including a substrate, a plurality of conductive patterns, an etch stop layer, an inter-layer insulation layer, a nitride on top the inter-layer insulation layer for forming a hard mask, an anti-reflective coating (ARC) layer and a photoresist pattern; (b) selectively etching the ARC layer and the nitride layer with use of the photoresist pattern as a first etch mask; (c) removing the photoresist pattern and the ARC layer; (d) etching the inter-layer insulation layer disposed between the conductive patterns by using the hard mask as an etch mask to form a contact hole exposing the etch stop layer; (e) removing the etch stop layer formed at a bottom area of the contact hole to expose the substrate; and (f) forming a plug electrically contacted to the exposed substrate, wherein the steps (b) and (d) to (e) proceeds in an in situ condition.