Vertical LC tank device

Details Vertical LC tank device Vertical LC tank device

2005-08-23

2008-01-29

Pascal, Robert (Department: 2817)

Oscillators

With frequency adjusting means

Variable inductance device

C331S1170FE, C331S067000, C331S17700V, C257S531000, C336S08400R

Reexamination Certificate

active

07323948

ABSTRACT:
An LC tank structure. The structure, including a set of wiring levels on top of a semiconductor substrate, the wiring levels stacked on top of each other from a lowest wiring level nearest the substrate to a highest wiring level furthest from the substrate; an inductor in the highest wiring level, the inductor confined within a perimeter of a region of the highest wiring level; and a varactor formed in the substrate, the varactor aligned completely under the perimeter of the region of the highest wiring level. The structure may additionally include an electric shield in a wiring level of the set of wiring levels between the lowest wiring level and the highest wiring level. Alternatively, the inductor includes a magnetic core and alternating electrically non-magnetic conductive metal coils and magnetic coils around the core.

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