Multi-level symmetrical inductor

Inductor devices – Coil or coil turn supports or spacers – Printed circuit-type coil

Reexamination Certificate

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Reexamination Certificate

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06967555

ABSTRACT:
An inductor includes a substrate, a first insulation layer, a second insulation layer, a first conductive section, a second conductive section, a third conductive section, and a fourth conductive section. The first conductive section and the second conductive section are symmetrical with respect to a first line. The third conductive section and the fourth conductive section are also symmetrical with respect to the first line. The first end of the first conductive section is connected to the first end of the fourth conductive section with a first via plug. The first end of the second conductive section is connected to the first end of the third conductive section with a second via plug.

REFERENCES:
patent: 6380835 (2002-04-01), Lee
patent: 6707367 (2004-03-01), Castaneda et al.
patent: 6717502 (2004-04-01), Yue
patent: 6759937 (2004-07-01), Kyriazidou
patent: 6794977 (2004-09-01), Christensen
patent: 6825749 (2004-11-01), Lin et al.
patent: 6867677 (2005-03-01), Nielson
A Fully Integrated CMOS DCS-1800 Frequency Synthesizer, IEEE. Journal of Solid-State Circuits. vol. 33. No. 12, Dec. 1998, pp. 2054-2055.
Miniature 3-D Inductors in Standard CMOS Process, IEEE Journal of Solid-state circuits, vol. 37, No. 4, Apr. 2002, pp. 471-472.

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