Patent ID: 8866259

Claim:
An inductor device comprising: a semiconductor substrate; a dielectric layer disposed on the semiconductor substrate; a planar spiral wiring disposed on the dielectric layer, the planar spiral wiring including a first spiral metal wiring and a second spiral metal wiring connected to a first end of the first spiral metal wiring, wherein the second spiral metal wiring includes at least two sub-metal-lines isolated with one another; a first contact layer disposed on the dielectric layer and connected to a second end of the first spiral metal wiring; and a second contact layer coupled to only at an end of the second spiral metal wiring, such that the at least two isolated sub-metal-lines of the second spiral metal wiring are in a parallel configuration between the second contact layer and the first spiral metal wiring, wherein, in a same planar layer, the first spiral metal wiring and, the second spiral metal wiring including the parallel configuration of the at least two isolated sub-metal-lines, are configured in series between the first contact layer and the second contact layer.