Method for attaching a bridging metal layer in via holes for supporting posts

Abstract

A method for attaching a bridging metal layer in supporting post via holes in an integrated circuit device is provided. The method include: (A) providing an integrated circuit wafer with a first coating layer as the outermost layer; (B) forming a sacrificial layer on the first coating layer and then forming a dielectric supporting layer on the sacrificial layer to obtain multiple supporting post via holes; (C) forming a bridging metal layer in the supporting post via holes and then forming a second coating layer; and (D) forming a connecting metal layer on the bridging metal layer and then forming a third coating layer on the bridging metal layer to obtain multiple supporting posts.

Dependencies are inferred from the claim text.