Patent ID: 6400023
Filing Date: 2002-06-04
Classification: H01L

Abstract:
A semiconductor device, comprising:a first etch stop layer formed on a substrate; a first fluorosilicate glass layer formed on the first etch stop layer, the first fluorosilicate glass layer including at least one via; a second etch stop layer formed on the first fluorosilicate glass layer; and a second fluorosilicate glass layer formed on the second etch stop layer, the second fluorosilicate glass layer including at least one trench that is connected the at least one via and that provides a conductive path to the substrate by way of the at least one via, wherein sidewalls of the at least one trench and the at least one via include a barrier metal layer that forms an outer surface of the sidewalls, a nitrided region formed adjacent to the barrier metal layer, and a fluorine-depleted region formed adjacent to the nitrided region, wherein the nitrided region is disposed between the fluorine-depleted region and the barrier metal layer to thereby provide a barrier for preventing fluorine atoms in the fluorine-depleted region from moving into the barrier metal layer.