A bond pad structure for an integrated circuit chip has a stress-buffering
layer between a top interconnection level metal layer and a bond pad
layer to prevent damages to the bond pad structure from wafer probing and
packaging impacts. The stress-buffering layer is a conductive material
having a property selected from the group consisting of Young's modulus,
hardness, strength and toughness greater than the top interconnection
level metal layer or the bond pad layer. For improving adhesion and
bonding strength, the lower portion of the stress-buffering layer may be
modified as various forms of a ring, a mesh or interlocking-grid
structures embedded in a passivation layer, alternatively, the
stress-buffering layer may has openings filled with the bond pad layer.