On-chip inductor having a square geometry and high Q factor...

Details On-chip inductor having a square geometry and high Q factor... On-chip inductor having a square geometry and high Q factor...

2005-08-30

2005-08-30

Mai, Anh (Department: 2832)

Inductor devices

Coil or coil turn supports or spacers

Printed circuit-type coil

C336S232000, C336S223000

Reexamination Certificate

active

06937128

ABSTRACT:
An on-chip inductor and/or on-chip transformer includes at least one dielectric layer and at least one conductive winding on the at least one dielectric layer. The conductive winding has a substantially square geometry and has at least its exterior corners geometrically shaped to reduce impedance of the conductive winding at a particular operating frequency. Since the quality factor of an on-chip inductor is inversely proportional to the effective series impedance of an inductor at an operating frequency, by reducing the effective series impedance, the quality factor is increased.

REFERENCES:
patent: 6285273 (2001-09-01), Morikawa
patent: 6407647 (2002-06-01), Apel et al.
patent: 2003/0137383 (2003-07-01), Yang et al.
Danesh, “A Q-Factor enhancement technique fo MMIC inductors”, IEEE MTT-S Digest, pp. 183-186, Jun. 1998.

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