Patent ID: 6767827
Filing Date: 2004-07-27
Classification: H01L

Abstract:
A method for forming a structure, comprising:forming an etch stop layer over a substrate; forming an opening through the etch stop layer; forming a first layer of dielectric material over the etch stop layer and the opening formed therethrough; forming a middle stop layer over the first layer of dielectric material; forming a second layer of dielectric material over the middle stop layer; forming a via opening down to the substrate through the second layer of dielectric material, the middle stop layer and the first layer of dielectric material, the via opening associated with the opening in the etch stop layer and having a first size; forming a trench opening down to the middle stop layer through the second layer of dielectric material, the trench opening having a second size that is greater than the first size; and filling the via or trench with a conductive material.