Printed circuit board having three-dimensional spiral...

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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11140680

ABSTRACT:
A printed circuit board (PCB) having a three-dimensional spiral inductor, which includes a plurality of insulating layers and conductor layers. The PCB comprises a plurality of coil conductor patterns made of conductive material and shaped into strips, which is provided on the plurality of conductor layers, respectively, such that the plurality of coil conductor patterns are parallel to each other and positioned on the same plane perpendicular to the conductor layers, and in which each of the plurality of coil conductor patterns is longer than an adjacent inner coil conductor pattern.

REFERENCES:
patent: 3992691 (1976-11-01), Molthen
patent: 5446311 (1995-08-01), Ewen et al.
patent: 5612660 (1997-03-01), Takimoto
patent: 6031445 (2000-02-01), Marty et al.
patent: 6291872 (2001-09-01), Wang et al.
patent: 04-237106 (1992-08-01), None
patent: 2003-158015 (2003-05-01), None
patent: WO-02/089157 (2002-11-01), None
Patent Abstracts of Japan for 2002-324962 published on Nov. 8, 2002.
Patent Abstracts of Japan for 2003-209331published on Jul. 25, 2003.

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