Title:
COMMON MODE CHOKE COIL
Document Type and Number:
WIPO Patent Application WO/2008/065824
Kind Code:
A1
Abstract:
A common mode choke coil in which the immunity characteristics are improved by
employing such a coil structure that malfunction of a transmission IC or a reception
IC can be prevented during a immunity test. The common mode choke coil comprises
a core (2), external electrodes (3-1 through 3-4), a pair of windings (4-1, 4-2)
and a top plate (5). The core (2) consists of a core portion (20) and a pair of flange
portions (21, 22) at the opposite ends thereof, wherein the external electrodes
(3-1 through 3-4) are formed at the lower part of the flange portions (21, 22).
The pair of windings (4-1, 4-2) are wound around the core portion (20) of the core
(2) and their end portions (4-1a, 4-2a) are bonded to the external electrodes
(3-1, 3-2) and the end portions (4-1b, 4-2b) are bonded to the external electrodes
(3-3, 3-4). The lower surface (5b) and the circumferential side face (5c) of
the top plate (5) are covered with a metal film (6) and bonded to the upper surfaces
of the flange portions (21, 22) by adhesive (7). Preferably, magnetic powder
is admixed to the adhesive (7).
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Inventors:
AZUMA TAKAHIRO (JP)
NISHIKAWA YOSHIE (JP)
AOKI TAKAHIRO (JP)
GOTO YOSHIMASA (JP)
SAITO YASUSHI (JP)
HIRAI SHINYA (JP)
ISHIWATA YU (JP)
MORINAGA TETSUYA (JP)
NISHIKAWA YOSHIE (JP)
AOKI TAKAHIRO (JP)
GOTO YOSHIMASA (JP)
SAITO YASUSHI (JP)
HIRAI SHINYA (JP)
ISHIWATA YU (JP)
MORINAGA TETSUYA (JP)
Application Number:
PCT/JP2007/070244
Publication Date:
June 05, 2008
Filing Date:
October 17, 2007
Export Citation:
Assignee:
MURATA MANUFACTURING CO (JP)
AZUMA TAKAHIRO (JP)
NISHIKAWA YOSHIE (JP)
AOKI TAKAHIRO (JP)
GOTO YOSHIMASA (JP)
SAITO YASUSHI (JP)
HIRAI SHINYA (JP)
ISHIWATA YU (JP)
MORINAGA TETSUYA (JP)
AZUMA TAKAHIRO (JP)
NISHIKAWA YOSHIE (JP)
AOKI TAKAHIRO (JP)
GOTO YOSHIMASA (JP)
SAITO YASUSHI (JP)
HIRAI SHINYA (JP)
ISHIWATA YU (JP)
MORINAGA TETSUYA (JP)
International Classes:
H01F27/36; H01F17/04
Foreign References:
JP2001093756A | 2001-04-06 | |||
JPH03252108A | 1991-11-11 | |||
JP2006073958A | 2006-03-16 | |||
JP2003168611A | 2003-06-13 | |||
JP2005322820A | 2005-11-17 | |||
JP2003168611A | 2003-06-13 | |||
JP2000133522A | 2000-05-12 | |||
EP1085533A1 | 2001-03-21 | |||
JP2004039876A | 2004-02-05 | |||
US20030071704A1 | 2003-04-17 |
Other References:
See also references of EP 2087494A4
Attorney, Agent or Firm:
TSUKAHARA, Takakazu (22-3 Minami-cho Kawasaki-k, Kawasaki-shi Kanagawa 15, JP)
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