Title:
LAMINATED CERAMIC CAPACITOR
Document Type and Number:
WIPO Patent Application WO/2013/039045
Kind Code:
A1
Abstract:
Provided is a highly reliable laminated ceramic capacitor in which the dielectric ceramic layer is thinned, while having few insulation failures, even if a high electric field strength is applied. The laminated ceramic capacitor is equipped with: a laminated body having internal electrode layers, and a dielectric ceramic layer comprising crystal grains and crystal grain boundaries; and external electrodes formed on the surface of the laminated body and electrically connecting the internal electrode layers exposed from the surface of the laminated body. With respect to the voltage (V)/current (I) characteristics of the laminated ceramic capacitor, upon application of a direct current voltage, when Log V is placed on the horizontal axis and Log I on the vertical axis, the voltage/current curve has a bend point at which the curve is split into first area on the low voltage side and a second area on the high voltage side. If the voltage (V)/current (I) characteristics are measured at 25°C, the bend electric field, which is obtained by dividing the bend voltage at the bend point by the thickness per layer of the dielectric ceramic, is at least 10 V/μm, and the slope of the voltage/current curve in the second area is at most 3.
Inventors:
SHIOTA AKIHIRO (JP)
MATSUDA MAKOTO (JP)
MATSUDA MAKOTO (JP)
Application Number:
PCT/JP2012/073125
Publication Date:
March 21, 2013
Filing Date:
September 11, 2012
Export Citation:
Assignee:
MURATA MANUFACTURING CO (JP)
SHIOTA AKIHIRO (JP)
MATSUDA MAKOTO (JP)
SHIOTA AKIHIRO (JP)
MATSUDA MAKOTO (JP)
International Classes:
H01G4/12; H01G4/30
Foreign References:
| JPH01202807A | 1989-08-15 | |||
| JPH10335174A | 1998-12-18 | |||
| JP2007173714A | 2007-07-05 | |||
| JPH08319157A | 1996-12-03 | |||
| JP2010232260A | 2010-10-14 |
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Claims: