Title:
MULTILAYER INDUCTOR
Document Type and Number:
WIPO Patent Application WO/2011/048873
Kind Code:
A1
Abstract:
Provided is a multilayer inductor which can increase the inductance value (L) and can prevent the Q-value from decreasing without losing direct current superposition characteristics. The multilayer inductor (10) has a multilayer chip (12) shaped like a rectangular parallelepiped, and a pair of external electrodes (17) formed on the end surfaces of the multilayer chip. The multilayer chip is provided with a plurality of magnetic layers (13), coil conductors (15), and nonmagnetic layers (14). Each nonmagnetic layer is provided between adjacent magnetic layers, rectangular notched portions (115) are formed at four corners of the outer periphery of each nonmagnetic layer in the outside area of a spiral coil (118), and columnar areas (112) consisting of magnetic layers are formed at the notched portions. This structure introduces magnetic flux to the columnar areas, so magnetic saturation tends not to occur, and the direct current superposition characteristics are not lost. Further, the notched portions to be formed on the nonmagnetic material are disposed so as to be brought into contact with the external electrodes, so the Q-value is improved.
Inventors:
NOGI KENICHIRO (JP)
KAMIYAMA YOSHIAKI (JP)
OKABE KENJI (JP)
KOHARA MASATAKA (JP)
KAMIYAMA YOSHIAKI (JP)
OKABE KENJI (JP)
KOHARA MASATAKA (JP)
Application Number:
PCT/JP2010/064771
Publication Date:
April 28, 2011
Filing Date:
August 31, 2010
Export Citation:
Assignee:
TAIYO YUDEN KK (JP)
NOGI KENICHIRO (JP)
KAMIYAMA YOSHIAKI (JP)
OKABE KENJI (JP)
KOHARA MASATAKA (JP)
NOGI KENICHIRO (JP)
KAMIYAMA YOSHIAKI (JP)
OKABE KENJI (JP)
KOHARA MASATAKA (JP)
International Classes:
H01F17/00; H01F17/04
Foreign References:
| JPH08130109A | 1996-05-21 | |||
| JP2006318946A | 2006-11-24 | |||
| JP2007281379A | 2007-10-25 |
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