LAYERED INDUCTOR - FDK CORP

Title:

LAYERED INDUCTOR

Document Type and Number:

WIPO Patent Application WO/2008/007705

Kind Code:

A1

Abstract:

[PROBLEMS] To provide a layered inductor capable of exhibiting an excellent DC superposition characteristic and suppressing AC resistance during low flow of DC bias current as well as a high characteristic that an inductance change is comparatively gentle in the entire current region where the coil current is within a rating range. [MEANS FOR SOLVING PROBLEMS] A layered inductor (10) includes an electrically insulating magnetic layer (22) and a conductive pattern (20) which are layered so that the conductive patterns are successively connected to form a coil wound spirally while superimposing in the layering direction in the magnetic body. Each of the two ends of the coil is pulled out of the layered body chip external surface via a pull-out conductor (24) and connected to an electrode terminal (12). At least one layer (26) of the electrically insulating magnetic gap is arranged over the entire layered surface. An electrically insulating non-magnetic pattern (28) corresponding to the conductive pattern shape is arranged in the proximity of the conductive pattern between the conductive patterns superimposed with a gap.

Inventors:

YAMAUCHI KIYOHISA (JP)
KAWAGUCHI MAKOTO (JP)
OKUDA KENJI (JP)
HITAKATSU SHINYA (JP)
SUZUKI SHIGENORI (JP)

Application Number:

PCT/JP2007/063820

Publication Date:

January 17, 2008

Filing Date:

July 11, 2007

Export Citation:

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Assignee:

FDK CORP (JP)
YAMAUCHI KIYOHISA (JP)
KAWAGUCHI MAKOTO (JP)
OKUDA KENJI (JP)
HITAKATSU SHINYA (JP)
SUZUKI SHIGENORI (JP)

International Classes:

H01F37/00; H01F17/00

Domestic Patent References:

WO2005010901A2	2005-02-03
WO2002056322A1	2002-07-18

Foreign References:

JPH06224043A	1994-08-12
JP2005268455A	2005-09-29
JPH0677022A	1994-03-18