Patent ID: 6953745
Filing Date: 2005-10-11
Classification: H01L

Abstract:
1. A metal interconnection structure, comprising: a lower metal interconnection layer pattern disposed in a first inter-layer dielectric layer; an inter-metal dielectric layer on the first inter-layer dielectric layer and the lower metal interconnection layer pattern, the inter-metal dielectric layer having a via contact hole that exposes a portion of an upper surface of the lower metal interconnection layer pattern; a second inter-layer dielectric layer on the inter-metal dielectric layer, the second inter-layer dielectric layer having a trench that exposes a portion of the via contact hole; a barrier metal layer on exposed lateral surfaces of the via contact hole and the exposed portion of the upper surface of the lower metal interconnection layer pattern; a first upper metal interconnection layer pattern having a first thickness on the barrier metal layer, the first upper metal interconnection layer pattern completely filling the via contact hole and partially filling the trench; a void diffusion barrier layer on the first upper metal interconnection layer pattern; and a second upper metal interconnection layer pattern that completely fills the trench on the void diffusion barrier layer.