Patent ID: 6365970
Filing Date: 2002-04-02
Classification: H01L

Abstract:
A bond pad structure formed over a predetermined area defined on a semiconductor substrate, the predetermined area being divided into a first area surrounding the periphery of the predetermined area, a second area spread at a central part of the predetermined area, at least one pair of third areas adjacent to the first area, and a fourth area between the second and third area as well as between the second and first area, said bond pad structure comprising:a lower metal layer formed over the predetermined area; a dielectric layer formed on the lower metal layer, the dielectric layer having via openings formed through the dielectric layer on the first, second and third areas only, respectively; a first diffusion barrier layer formed over the dielectric layer and the sidewalls and bottom of the via openings; via plugs formed by filling a metal material into the via openings; a second diffusion barrier layer formed over the first diffusion barrier layer and via plugs; and an upper metal layer formed over the second diffusion barrier layer.