Patent ID: 7470927

Claim:
A method for fabricating a circuit component comprising: providing a semiconductor substrate, a first coil over said semiconductor substrate, and a passivation layer over said first coil, wherein said flassivation layer comprises a nitride layer having a thickness between 0.2 and 1.2 micrometers; coating a first polymer layer on said passivation layer; after said coating said first polymer layer, exposing said first polymer layer using 1X stepper; after said exposing said first polymer layer, curing said first polymer layer; and after said curing said first polymer layer, forming a second coil over said first polymer layer, over said passivation layer and directly over said first coil, wherein said forming said second coil comprises sputtering a titanium-containing layer over said first polymer layer, followed by sputtering a first gold layer on said titanium-containing layer, followed by forming a photoresist layer on said first gold layer, wherein an opening in said photoresist layer is over said first gold layer and exposes said first gold layer, followed by electroplating a second gold layer having a thickness between 1 and 30 micrometers on said first gold layer exposed by said opening using an electrolyte comprising a sulphurous acid, a sodium ion and a gold ion, followed by removing said photoresist layer, followed by etching said first gold layer not under said second gold layer, followed by etching said titanium-containing layer not under said second gold layer.