Patent ID: 8242544

Claim:
A structure with reduced resist poisoning, comprising a first structure embedded in dielectric wherein the dielectric is arranged adjacent to a vertical sidewall of the first structure and a portion of a same dielectric extends above the first structure, an oxide layer arranged on the vertical sidewall between the vertical sidewall and the dielectric, the dielectric being deposited over a second structure embedded in an underlying dielectric, and further comprising a means for binding, trapping or consuming contaminates of the underlying dielectric, said means comprising a copper diffusion barrier layer, wherein one portion of said means is arranged over part of the second structure and another portion of said means is arranged over part of the underlying dielectric, and wherein the first structure is a dual damascene via and is in contact with the second structure, and further comprising a wire formed over the via, wherein the oxide layer comprises a cap over an upper portion of the via between the wire and the via.