Patent ID: 7960269

Claim:
A method for fabricating a circuit component, comprising: providing a silicon substrate, a transistor in and on said silicon substrate, a first dielectric layer over said silicon substrate, a first circuit layer over said first dielectric layer, a second dielectric layer over said first circuit layer and over said first dielectric layer, a second circuit layer over said second dielectric layer, and a passivation layer over said first and second circuit layers and over said first and second dielectric layers, wherein said passivation layer comprises a nitride layer; forming a first metal layer over said passivation layer; forming a first photoresist layer on said first metal layer, wherein a first opening in said first photoresist layer exposes a first region of said first metal layer; after said forming said first photoresist layer, forming a second metal layer over said first region; after said forming said second metal layer, removing said first photoresist layer; forming a second photoresist layer on said second metal layer, wherein a second opening in said second photoresist layer exposes a second region of said second metal layer; after said forming said second photoresist layer, forming a third metal layer over said second region; after said forming said third metal layer, removing said second photoresist layer; after said removing said second photoresist layer and said removing said first photoresist layer, removing said first metal layer not under said second metal layer; after said removing said first metal layer not under said second metal layer, forming a polymer layer on said second metal layer and on a top of said third metal layer; removing said polymer layer on said top; after said removing said polymer layer on said top, forming a fourth metal layer over said polymer layer and over said top; after said forming said fourth metal layer, forming a third photoresist layer on said fourth metal layer, wherein a third opening in said third photoresist layer exposes a third region of said fourth metal layer; after said forming said third photoresist layer, forming a fifth metal layer over said third region; after said forming said fifth metal layer, removing said third photoresist layer; after said forming said fifth metal layer, forming a fourth photoresist layer on said fifth metal layer, wherein a fourth opening in said fourth photoresist layer exposes a fourth region of said fifth metal layer; after said forming said fourth photoresist layer, forming a sixth metal layer over said fourth region; after said forming said sixth metal layer, removing said fourth photoresist layer; and after said removing said fourth photoresist layer and said removing said third photoresist layer, removing said fourth metal layer not under said fifth metal layer.