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Patent Searching and Data


Title:
LAMINATED INDUCTOR
Document Type and Number:
WIPO Patent Application WO/2012/077315
Kind Code:
A1
Abstract:
Provided is a technology capable of suppressing an increase in loss while increasing inductance. Coil electrode layers (3) constitute an inductor section. In the central coil electrode layer of the inductor section, the magnetism leakage is small and an inductance increasing effect obtained by spirally forming a coil pattern (2) is large. In at least the uppermost coil electrode layer and the lowermost coil electrode layer of the inductor section, the magnetism leakage is large and the inductance increasing effect obtained by spirally forming the coil pattern (2) is small. The coil pattern (2) of the central coil electrode layer is spirally wound to increase the inductance, while the number of turns of the coil pattern (2) in each of the uppermost and lowermost coil electrode layers (3) is set to 1 or less. As a result, the entire wire length obtained by connecting the coil patterns (2) in series in the laminating direction can be reduced, making it possible to suppress the increase in loss.

Inventors:
IWANAGA MINORU (JP)
Application Number:
JP2011/006759
Publication Date:
June 14, 2012
Filing Date:
December 02, 2011
Export Citation:
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Assignee:
MURATA MANUFACTURING CO (?6178555, JP)
IWANAGA MINORU (JP)
International Classes:
H01F17/00
Domestic Patent References:
WO2005122192A12005-12-22
Foreign References:
JP2004153502A2004-05-27
JP2002246231A2002-08-30
JPS5755918U1982-04-01
Attorney, Agent or Firm:
YANASE, Yuji et al. (?5300047, JP)
Yuji Yanase (?5300047, JP)
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