Title:
ANTENNA COIL AND MANUFACTURING METHOD THEREOF
Document Type and Number:
WIPO Patent Application WO/2013/031641
Kind Code:
A1
Abstract:
An easy-to-manufacture antenna coil with less incidences of chipping is provided without substantially causing an increase in the wiring resistance of a conductor coil and a drop in the specific resistance of a magnetic core. The antenna coil (10) includes a magnetic core (1) and a conductor coil (3) that is provided around or inside the magnetic core (1). The conductor coil (3) is made of a conductor containing copper, and the magnetic core (1) is made of a sintered ferrite material containing Fe, Mn, Ni, Zn, and Cu. This sintered ferrite material contains: Cu in an amount of 5 mol% or less in terms of CuO; and either Fe in an amount of 25 mol% to 47 mol% inclusive in terms of Fe2O3 and Mn in an amount of 1 mol% to 7.5 mol% exclusive in terms of Mn2O3; or Fe in an amount of 35 mol% to 45 mol% inclusive in terms of Fe2O3 and Mn in an amount of 7.5 mol% to 10 mol% inclusive in terms of Mn2O3.
Inventors:
KOMATSU HIROSHI (JP)
YAMAMOTO ATSUSHI (JP)
NAKAMURA AKIHIRO (JP)
YAMAMOTO ATSUSHI (JP)
NAKAMURA AKIHIRO (JP)
Application Number:
PCT/JP2012/071324
Publication Date:
March 07, 2013
Filing Date:
August 23, 2012
Export Citation:
Assignee:
MURATA MANUFACTURING CO (JP)
KOMATSU HIROSHI (JP)
YAMAMOTO ATSUSHI (JP)
NAKAMURA AKIHIRO (JP)
KOMATSU HIROSHI (JP)
YAMAMOTO ATSUSHI (JP)
NAKAMURA AKIHIRO (JP)
International Classes:
H01Q7/06; C01G49/00; C01G53/00; C04B35/30
Domestic Patent References:
| WO2011093489A1 | 2011-08-04 |
Foreign References:
| JP2010018482A | 2010-01-28 | |||
| JP2011097524A | 2011-05-12 | |||
| JP2006219306A | 2006-08-24 |
Attorney, Agent or Firm:
SAMEJIMA, Mutsumi et al. (JP)
Mutsumi Sameshima (JP)
Mutsumi Sameshima (JP)
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Claims: