Patent ID: 7250364
Filing Date: 2007-07-31
Classification: H01L

Abstract:
1. A method for forming a semiconductor device with composite etch stop layer, comprising: providing a substrate having a conductive member; forming a first etch stop layer on the conductive member and the substrate, covering the conductive member and the substrate; forming a second etch stop layer on the first etch stop layer, covering the first etch stop layer, wherein the second etch stop layer comprises silicon oxycarbide bonded with an organic group selected from the group consisting of alkyl group, phenyl group, and cyclic group; forming a dielectric layer over the second etch stop layer; sequentially patterning the dielectric layer, the second etch stop layer and the first etch stop layer to form an opening therein, exposing the substrate and a portion of the conductive member; and filling the opening with conductive material to form a conductive feature, electrically connecting the conductive member.