Monolithic inductor

Details Monolithic inductor Monolithic inductor

1997-02-19

1999-12-28

Luebke, Renee S.

Inductor devices

Coil or coil turn supports or spacers

Printed circuit-type coil

336232, 333185, H01F 500, H03H 700

Patent

active

060087137

ABSTRACT:
The monolithic inductor (30) includes a substrate (38), a spiral metal trace (32) disposed insulatively above the substrate (38), where a parasitic capacitance (56) is generated between the spiral metal trace (32) and the substrate (38), and a depletion layer is generated under the spiral metal trace (32) with a depletion junction capacitance (58) coupled in series with the parasitic capacitance (56). The overall capacitance is thus reduced, which enhances the self-resonance frequency of the inductor (30). For the same self-resonance frequency, a thicker metal trace may be used to implement the inductor, resulting in an improved quality factor, Q.

REFERENCES:
patent: 5070317 (1991-12-01), Bhagat
patent: 5136357 (1992-08-01), Hesson et al.
patent: 5260595 (1993-11-01), Hayama
patent: 5360989 (1994-11-01), Endo
patent: 5450263 (1995-09-01), Desaigoudar
patent: 5492856 (1996-02-01), Ikeda et al.
patent: 5539241 (1996-07-01), Abidi et al.
patent: 5661332 (1997-08-01), Nakamura et al.
patent: 5705963 (1998-01-01), Ikeda et al.

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