Patent ID: 8018060

Claim:
An integrated circuit structure comprising: a silicon substrate; a transistor in and on said silicon substrate; a first dielectric layer over said silicon substrate; a metallization structure over said first dielectric layer, wherein said metallization structure comprises a first metal layer and a second metal layer over said first metal layer; a second dielectric layer over said first dielectric layer and between said first and second metal layers; a metal trace over said silicon substrate; a contact pad over said silicon substrate; a passivation layer over said metallization structure, said first and second dielectric layers and said metal trace, wherein a first opening in said passivation layer is over a contact point of said contact pad, and said contact point is at a bottom of said first opening, wherein said passivation layer comprises a nitride; a polymer layer on a top surface of said passivation layer, wherein said polymer layer has a thickness between 2 and 150 micrometers, wherein a second opening in said polymer layer is over said contact point and over a region of said top surface of said passivation layer; a coil on said polymer layer, wherein said coil comprises a glue layer, a copper seed layer having a thickness between 0.2 and 1 micrometer on said glue layer, and an electroplated copper layer having a thickness between 3 and 20 micrometers on said copper seed layer, wherein there is an undercut with an edge of said glue layer recessed from an edge of said electroplated copper layer, wherein a first product of resistance of a first section of said coil times capacitance of said first section is at least 100 times smaller than a second product of resistance of a second section of said metal trace times capacitance of said second section, wherein said first section has a same length as said second section; a metal interconnect on said polymer layer, said region of said top surface of said passivation layer, and said contact point, wherein said metal interconnect is connected to said contact point through said first and second openings; and a solder bump connected to said metal interconnect.