Inductor devices – Coil or coil turn supports or spacers – Printed circuit-type coil
Reexamination Certificate
2005-04-26
2005-04-26
Donovan, Lincoln (Department: 2832)
Inductor devices
Coil or coil turn supports or spacers
Printed circuit-type coil
C257S531000
Reexamination Certificate
active
06885275
ABSTRACT:
An integrated circuit inductor includes a spiral pattern disposed upon a substrate. The track of the spiral is divided into multiple tracks to form a multi-track inductor. The individual tracks are disposed side by side and in different layers. Tracks that are aligned vertically are coupled by feed throughs, or vias. Multiple vias are used along the length of each of the multiple tracks. Tracks disposed in the same layer are joined together at their beginning, and at their termination. A patterned shield is fabricated from conductive fingers of n+ salicided material that is separated by non conducting polysilicon that fills the gaps between the fingers. The conductive fingers are coupled together in groups, which are in turn tied to a single point ground. In tying the groups together, a gap in the conducting path is provided to prevent ground loop currents. The shield is disposed between the multi-track inductor and the substrate.
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Broadcom Corporation
Donovan Lincoln
Sterne Kessler Goldstein & Fox P.L.L.C.
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