Patent ID: 6200890
Filing Date: 2001-03-13
Classification: H01L

Abstract:
A method of fabricating a copper (Cu) damascene, comprising steps of:forming a plurality of openings in a dielectric layer;forming a conformal barrier layer in these openings;forming a plurality of Cu conducting wires in these openings;removing a part of the first dielectric layer to expose a part of a sidewall of the barrier layer, so that the Cu conducting wires project out from the surface of the first dielectric layer;forming a top barrier layer, wherein the top barrier layer conformally covers the Cu conducting wires and the sidewall of the barrier layer;forming an oxide layer to cover the top barrier layer;removing a part of the oxide layer to expose a part of the top barrier layer between the Cu conducting wires;removing the exposed top barrier layer with the remaining oxide layer as an etching mask until the surface of the first dielectric layer is exposed; andforming a second dielectric layer, wherein the second dielectric layer completely covers the remaining oxide layer and the first dielectric layer.