Patent ID: 7977788

Claim:
A contact structure, comprising: a plurality of metal pads; a passivation layer disposed above the plurality of metal pads and exposing a portion of each of the plurality of metal pads; a plurality of polymeric compliant bumps each disposed over at least a part of the passivation layer, the plurality of polymeric compliant bumps being separate from one another, the entirety of each of the polymeric compliant bumps being formed above a corresponding one of the plurality of metal pads; a plurality of testing areas each defined adjacent to a corresponding different one of the plurality of polymeric compliant bumps; and a conductive material that forms a conductive metal layer partially covering a surface of each of the plurality of polymeric compliant bumps so as to form a plurality of conductive bumps, and covering the plurality of testing areas, wherein each of the plurality of the covered polymeric compliant bumps and each of the plurality of testing areas are formed in a surface of a corresponding one of the plurality of metal pads.