Ceramic electronic component and method for producing ceramic electronic component

Patent metadata

Field	Value
Publication number	US-9741489-B2
Application number	US-201715419003-A
Country	US
Kind code	B2
Filing date	Jan 30, 2017
Priority date	Mar 5, 2010
Publication date	Aug 22, 2017
Grant date	Aug 22, 2017

Abstract

A ceramic electronic component includes a ferrite material magnetic body part and a Cu conductive part, the ferrite containing 20 to 48% trivalent Fe in terms of Fe 2 O 3 and divalent Ni. The ferrite can contain Mn so that it is less than 50% of the total of Fe and Mn in terms of Mn 2 O 3 and Fe 2 O 3 . The magnetic and conductive parts are co-fired at a pressure not exceeding the equilibrium oxygen partial pressure of Cu—Cu 2 O thereby ensuring insulating performance and favorable electrical characteristics.

First claim

The invention claimed is:

1. A method for producing a ceramic electronic component, the method comprising:
providing a laminated body comprising a stack of a plurality of ceramic green sheets having a conductive film thereon in which at least one conductive film contains Cu as its main constituent and is sandwiched between a pair of green sheets, wherein at least one green sheet comprises a calcined powder comprising trivalent Fe and one or more divalent elements including at least divalent Ni, 20 to 48 mol % of Fe 2 O 3 , 2 mol % to less than 50 mol % of Mn 2 O 3 based on a total amount of the Mn 2 O 3 and the Fe 2 O 3 ; and
firing the laminate body in a firing atmosphere at a pressure equal to or lower than the equilibrium oxygen partial pressure of Cu—Cu 2 O, to produce a ferrite body.

2. The method for producing a ceramic electronic component according to claim 1 , the calcined powder has 25 to 47 mol % of the Fe 2 O 3 , 10 mol % or less of CuO, and 33 mol % or less of ZnO.

3. The method for producing a ceramic electronic component according to claim 2 , wherein the calcined powder has 30 to 46 mol % of the Fe 2 O 3 , at least 1 mol % of the CuO, and at least 6 mol % of the ZnO.

4. The method for producing a ceramic electronic component according to claim 1 , further comprising forming the laminated body by constructing a stack of a plurality of ceramic green sheets with the conductive film thereon.

Assignees

• Murata Manufacturing Co

Inventors

• Nakamura Akihiro
• Yamamoto Atsushi
• Nomiya Yuko

Classifications

• C04B2235/6583

  Oxygen containing atmosphere, e.g. with changing oxygen pressures · CPC title

• H01F41/041 Primary

  Printed circuit coils (apparatus or processes for manufacturing printed circuits in general H05K3/00) · CPC title

• H01F2027/2809

  on stacked layers · CPC title

• C04B2235/3265

  Mn2O3 · CPC title

• C04B2235/3284

  Zinc oxides, zincates, cadmium oxides, cadmiates, mercury oxides, mercurates or oxide forming salts thereof · CPC title