Patent ID: 6504247
Filing Date: 2003-01-07
Classification: H01L

Abstract:
A microelectronic device comprising a substrate, a dielectric layer on the substrate, wherein the dielectric layer comprises a silicon containing polymer an alkoxysilane polymer, a silsesquioxane polymer, a siloxane polymer, a poly(arylene ether), a fluorinated poly(arylene ether), a nanoporous silica or combinations thereof; a trench having inside wall through the dielectric layer; a lining of a barrier metal on the inside walls of the trench; a fill metal in the trench between the linings on the inside walls of the trench, wherein the fill metal and the barrier metal have substantially different removal selectivities; a covering of the barrier metal on the fill metal, which covering spans the linings on the inside walls of the trench and conforms to the top of the fill metal in the trench.