Title:
CERAMIC ELECTRONIC PART
Document Type and Number:
WIPO Patent Application WO/2007/060774
Kind Code:
A1
Abstract:
A ceramic electronic part that permits identifying of the orientation of the
ceramic electronic part through the use of a marker provided thereinside, and
that avoids drop of reliability through inhibition of any diffusion of coloring
component from the marker. Stator (101) constituting part of a trimmer condenser
is disposed between ceramic sintered body (103) composed of, superimposed one
upon another, multiple ceramic layers (102) and ceramic layer (102). The stator
(101) includes internal conductor (104) drawn out to a side face of the ceramic
sintered body (103); external conductor (105a) provided on a side face of the
ceramic sintered body (103) and electrically connected to the internal conductor
(104); external conductor (105b) provided on a side face of the ceramic sintered
body (103) opposite to the side face provided with the external conductor (105a);
and black ceramic layer (106) disposed between ceramic layers (102). The black
ceramic layer (106) contains an Mn oxide and an Fe oxide in a weight ratio of 3:2
to 1:3 in terms of MnCO3 and Fe2O3, respectively.
The internal conductor (104) and the black ceramic layer (106) are arranged in
such a fashion that in the direction of ceramic layer (102) lamination, they substantially
do not overlap each other.
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Inventors:
MATSUO MASAHIRO (JP)
Application Number:
PCT/JP2006/316466
Publication Date:
May 31, 2007
Filing Date:
August 23, 2006
Export Citation:
Assignee:
MURATA MANUFACTURING CO (JP)
MATSUO MASAHIRO (JP)
MATSUO MASAHIRO (JP)
International Classes:
H01G2/24; H01G5/01
Foreign References:
| JPH0747862Y2 | 1995-11-01 | |||
| JPS52131146A | 1977-11-02 |
Attorney, Agent or Firm:
YAMAMOTO, Toshinori (Kondo Bldg. 4-12, Nishitenma 4-chome, Kita-ku, Osaka-sh, Osaka 47, JP)
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