Patent ID: 7384864

Claim:
A method of fabricating an integrated circuit chip comprising: providing a semiconductor wafer comprising a silicon substrate, multiple semiconductor devices in or over said silicon substrate, a first dielectric layer over said silicon substrate, a first metallization structure over said first dielectric layer, said first metallization structure being connected to said multiple semiconductor devices, said first metallization structure comprising a first metal layer and a second metal layer over said first metal layer, a second dielectric layer between said first and second metal layers, and a passivation layer over said first metallization structure and over said first and second dielectric layers; forming a polymer layer over said passivation layer of said semiconductor wafer, a first opening in said polymer layer exposing a first contact point of said first metallization structure, and a second opening in said polymer layer exposing a second contact point of said first metallization structure, wherein said first contact point is separate from said second contact point, wherein said forming said polymer layer comprises a photosensitive-polymer depositing process and a curing process, wherein said polymer layer after said curing process has a thickness between 2 and 30 micrometers and greater than that of said passivation layer, that of said first dielectric layer and that of said second dielectric layer; and forming a second metallization structure over said passivation layer of said semiconductor wafer, over said polymer layer and over said first and second contact points, wherein multiple portions of said first metallization structure within a chip are connected through said second metallization structure and through said first and second openings, wherein said second metallization structure comprises a third metal layer over said polymer layer, said third metal layer having a thickness greater than that of said first metal layer and that of said second metal layer, and wherein said forming said second metallization structure comprises a copper electroplating process.