Patent ID: 6703286
Filing Date: 2004-03-09
Classification: H01L

Abstract:
A method of forming a first level bond pad, comprising the steps of:providing a pre-processed semiconductor substrate having active elements in or on its surface, said active elements having points of electrical contact in or on the surface of said substrate, furthermore bond pads have been created on the surface of said substrate, said bond pads having a height in a direction that is perpendicular to the surface of said substrate, further having a cross section in a plane that is parallel with a plane of the surface of said substrate, said cross section being a geometric square or rectangle, said cross section having a surface area; etching said bond pads creating cavities in said bond pads, providing intra bond-pad contact points, furthermore providing intra bond-pad interconnects, said intra-bond contact points having a height that is equal to said height of said bond pads, further having a cross section in a plane that is parallel with a plane of the surface of said substrate, said cross section of said intra-bond contact points being a geometric square or rectangle, said cross section of said intra-bond contact points having a surface area that is smaller than said surface area of said cross section of said bond pads by a measurable amount, said intra-bond pad interconnects having a height in a direction that is perpendicular to the surface of said substrate that equals said height of said intra-bond contact points, said intra-bond pad interconnects establishing electrical interconnects between adjacent intra-bond contact points in an X and an Y direction; depositing a layer of dielectric over said etched bond pads, filling said cavities created in said bond pads, said layer of dielectric further overlying the surface of said intra-bond contact points and said intra bond-pad interconnects; creating contact openings in said layer of dielectric, said openings being aligned with the surface of said intra-bond contact points; and depositing and planarizing a layer of metal over said layer of dielectric, including said openings created in said layer of dielectric that align with said intra bond-pad contact points, forming said first level bond pad overlying said intra bond-pad contact points.