Patent ID: 8803321
Filing Date: 2014-08-12
Classification: H01L

Abstract:
1. A metal interconnect structure comprising: a dielectric material stack including at least a first dielectric material layer and a second dielectric material layer overlying said first dielectric material layer; a stack, from a bottom to a top, of a first metal line and a dielectric cap material portion, said stack located within said first dielectric material layer and wherein an upper surface of said dielectric cap material portion is coplanar with an upper surface of said first dielectric material layer; and a dual damascene line and via structure including a second metal line and a via structure, wherein said second metal line is embedded within said second dielectric material layer and said via structure is embedded within said first dielectric material layer, and wherein said second metal line is in direct contact with said via structure, and a bottom surface of said via structure is in direct physical contact with a portion of a top surface of said first metal line.