Patent ID: 6077770
Filing Date: 2000-06-20
Classification: H01L

Abstract:
A damascene manufacturing process capable of forming borderless via, comprising the steps of:providing a substrate structure having a first dielectric layer with a first trench formed thereon;forming a first conductive layer over the substrate structure such that the first conductive layer at least fills the first trench completely;removing a portion of the first conductive layer to expose the first dielectric layer, thereby forming a conductive line within the first trench;removing a portion of the conductive line, thereby forming a second trench above the conductive line within the first dielectric layer;forming an insulation layer over the first dielectric layer such that the insulation layer at least fills the second trench completely;removing a portion of the insulation layer to expose the first dielectric layer, thereby forming a cap layer over the conductive line within the second trench;forming a second dielectric layer over the first dielectric layer;patterning the second dielectric layer to form a via opening that exposes the cap layer;removing the cap layer to form a cavity region that exposes the conductive line;forming a second conductive layer over the substrate structure such that the second conductive layer at least fills the via opening and the cavity region completely; andremoving a portion of the second conductive layer to expose the second dielectric layer, thereby forming a plug within the via opening and the recess cavity such that the plug is electrically coupled with the conductive line.