Patent ID: 7439624
Filing Date: 2008-10-21
Classification: H01L

Abstract:
1. An interconnect structure comprising: a first dielectric layer having at least one metallic interconnect embedded therein; a second dielectric layer located atop said first dielectric layer, wherein said second dielectric layer has at least one aperture having an upper line region and a lower via region; a first liner located atop the vertical and horizontal walls of said at least one aperture and said at least one metallic interconnect; a first conductive material partially filling said at least one aperture; a second liner located atop the remaining vertical and horizontal walls of said at least one aperture and said first conductive material, said second liner being discontinuous on said horizontal wall, wherein said second liner partially covers a bottom surface of said lower via region and said second liner is missing in a central area of said bottom surface of said lower via region; and a second conductive material filling said remaining vertical and horizontal walls of said at least one aperture.