Patent ID: 6524962
Filing Date: 2003-02-25
Classification: H01L

Abstract:
A method for forming a dual-damascene structure, said method comprising:providing a substrate; forming a first dielectric layer on said substrate, wherein the thickness of said first dielectric layer is about 500 angstrom to 4000 angstrom; forming a second dielectric layer on said first dielectric layer, wherein the thickness of said second dielectric layer is about 1500 angstrom to 20000 angstrom; removing a portion of said second dielectric layer and said first dielectric layer to form a first via hole in said first dielectric layer; removing a portion of said second dielectric layer to form a second via hole in said second dielectric layer, wherein said second via hole connects with said first via hole; forming a conductive layer to fill said first via hole and said second via hole; removing said second dielectric layer; and forming a low-k dielectric layer on said first dielectric layer which is exposing said conductive layer.