Title:
Lamination coil part article
Document Type and Number:
Japanese Patent JP6222618
Kind Code:
B2
Abstract:
A laminated coil component includes a magnetic body part 2 made of a Ni-Zn-based ferrite material and a coil conductor 3 containing Cu as a main component, which is wound into a coil shape, and the coil conductor 3 is embedded in the magnetic body part 2 to form a component base 1. The component base 1 is divided into a first region 6 near the coil conductor 3 and a second region 7 other than the first region 6. The grain size ratio D1/D2 of the average crystal grain size D1 of the magnetic body part 2 in the first region 6 to the average crystal grain size D2 of the magnetic body part 2 in the second region 7 is 0.85 or less. The molar content of CuO in the ferrite raw material is set to 6 mol% or less, and firing is performed in a reducing atmosphere in which the oxygen partial pressure is an equilibrium oxygen partial pressure of Cu-Cu 2 O or less. Thereby, a laminated coil component, which has excellent thermal shock resistance that the fluctuation of inductance is small even when thermal shock is given or external stress is loaded, and has excellent DC superposition characteristics, is obtained without requiring a complicated process.
Inventors:
Atsushi Yamamoto
Akihiro Nakamura
Yuko Nomiya
Tomoyuki Aku
Osamu Naito
Akihiro Nakamura
Yuko Nomiya
Tomoyuki Aku
Osamu Naito
Application Number:
JP2014222647A
Publication Date:
November 01, 2017
Filing Date:
October 31, 2014
Export Citation:
Assignee:
MURATA MANUFACTURING CO.,LTD.
International Classes:
H01F17/00; H01F17/04; H01F41/02; H01F41/04
Domestic Patent References:
| JP63102215A | ||||
| JP2010278075A | ||||
| JP6275453A | ||||
| JP2005217078A | ||||
| JP2003272912A |
Foreign References:
| WO2008096795A1 | ||||
| WO2007148455A1 |
Other References:
丸山俊夫,Q&A(入門編)金属の高温酸化(3)エリンガム図の見方,材料と環境,日本,腐食防食協会,1996年 8月,45巻 8号,495~498
Attorney, Agent or Firm:
Kunihiro Yasutoshi