US 8,913,367 B2 · Multilayered ceramic capacitor and method of manufacturing the same

Abstract

There is provided a multilayered ceramic capacitor including: a ceramic body; a plurality of first and second internal electrodes having first and second lead-out portions overlapped with each other, respectively, and exposed to one surface of the ceramic body; first and second external electrodes formed on one surface of the ceramic body and electrically connected to the first and second lead-out portions, respectively; and an insulating layer formed on one surface of the ceramic body to cover exposed portions of the first and second lead-out portions, wherein the first lead-out portion has a first overlap increase part of which a forward edge has an inclined surface, and the second lead-out portion has a second overlap increase part of which a forward edge has an inclined surface.

Drawings

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Drawings

Claims10

Dependent claims

A multilayered ceramic capacitor comprising:

a ceramic body including a plurality of dielectric layers stacked therein;
a plurality of first and second internal electrodes alternately formed on the plurality of dielectric layers, having first and second lead-out portions overlapped with each other, respectively, and exposed to one surface of the ceramic body;
first and second external electrodes formed on one surface of the ceramic body and electrically connected to the first and second lead-out portions, respectively;
and
an insulating layer formed on one surface of the ceramic body so as to cover exposed portions of the first and second lead-out portions,
wherein the first lead-out portion having a first overlap increase part of which a forward edge has a flat inclined surface at one edge portion exposed to one surface of the ceramic body, and the second lead-out portion having a second overlap increase part of which a forward edge has a flat inclined surface at the other edge portion exposed to one surface of the ceramic body, and
wherein ratios of areas of margin portions in a width direction to areas obtained by adding the areas of the margin portions in the width direction, which are non-overlapped regions of the dielectric layer, to areas of the first and second internal electrodes, are 0.3% or more, respectively.

4 more elements

A method of manufacturing a multilayered ceramic capacitor, the method comprising:

forming a first internal electrode on a first ceramic sheet so that a first lead-out portion is exposed through one surface of the first ceramic sheet;
forming a second internal electrode on a second ceramic sheet so that a second lead-out portion having a region overlapped with the first lead-out portion is exposed through one surface of the second ceramic sheet;
forming a ceramic body by alternately multi-layering a plurality of first and second ceramic sheets on which the first and second internal electrodes are formed and firing the multilayered ceramic sheets;
forming first and second external electrodes on one surface of the ceramic body so as to be electrically connected to the first and second lead-out portions, respectively, and
forming an insulation layer on one surface of the ceramic body so as to cover exposed portions of the first and second lead-out portions,
wherein in the first lead-out portion, a first overlap increase part of which a forward edge has a flat inclined surface is formed at one edge portion exposed to one surface of the first ceramic sheet, and in the second lead-out portion, a second overlap increase part of which a forward edge has a flat inclined surface is formed at the other edge portion exposed to one surface of the second ceramic sheet, and
wherein ratios of areas of margin portions in a width direction to areas obtained by adding the areas of the margin portions in the width direction, which are non-overlapped regions of the dielectric layer, to areas of the first and second internal electrodes, are 0.3% or more, respectively.

4 more elements

A method of manufacturing a multilayered ceramic capacitor, the method comprising:

forming a first internal electrode on a first ceramic sheet so that a first lead-out portion is exposed through one surface of the first ceramic sheet;
forming a second internal electrode on a second ceramic sheet so that a second lead-out portion having a region overlapped with the first lead-out portion is exposed through one surface of the second ceramic sheet;
forming a ceramic body by alternately multi-layering a plurality of first and second ceramic sheets on which the first and second internal electrodes are formed and firing the multilayered ceramic sheets;
forming first and second external electrodes on one surface of the ceramic body so as to be electrically connected to the first and second lead-out portions, respectively, and
forming an insulation layer on one surface of the ceramic body so as to cover exposed portions of the first and second lead-out portions,
wherein in the first lead-out portion, a first overlap increase part of which a forward edge has outwardly convex inclined surface is formed at one edge portion exposed to one surface of the first ceramic sheet, and in the second lead-out portion, a second overlap increase part of which a forward edge has outwardly convex inclined surface is formed at the other edge portion exposed to one surface of the second ceramic sheet, and
wherein ratios of areas of margin portions in a width direction to areas obtained by adding the areas of the margin portions in the width direction, which are non-overlapped regions of the dielectric layer, to areas of the first and second internal electrodes, are 0.3% or more, respectively.

4 more elements

Dependencies are inferred from the claim text.

Description4,779 words

Summary1,230 words

#This application claims the priority of Korean Patent Application No. 10-2012-0143470 filed on Dec. 11, 2012, in the Korean Intellectual Property Office, the disclosure of which is incorporated herein by reference.

#1. Field of the Invention

#The present invention relates to a multilayered ceramic capacitor and a method of manufacturing the same.

Brief description of the drawings6 figures

#The above and other aspects, features and other advantages of the present invention will be more clearly understood from the following detailed description taken in conjunction with the accompanying drawings, in which:

#FIG. 1 is a transparent perspective view schematically showing a multilayered ceramic capacitor according to an embodiment of the present invention;

#FIG. 2 is a transparent perspective view showing the multilayered ceramic capacitor of FIG. 1 in a direction in which the capacitor is mounted;

Detailed description3,358 words

#Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings. The invention may, however, be embodied in many different forms and should not be construed as being limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the scope of the invention to those skilled in the art.

#In the drawings, the shapes and dimensions of elements may be exaggerated for clarity, and the same reference numerals will be used throughout to designate the same or like elements.

#FIG. 1 is a transparent perspective view schematically showing a multilayered ceramic capacitor according to an embodiment of the present invention; FIG. 2 is a transparent perspective view showing the multilayered ceramic capacitor of FIG. 1 in a direction in which the capacitor is mounted; FIG. 3 is a transverse cross-sectional view showing first and second internal electrodes of the multilayered ceramic capacitor of FIG. 1; and FIG. 4 is a transverse cross-sectional view showing a structure in which first and second external electrodes and an insulating layer are formed at the first and second internal electrodes of FIG. 3.

Facts

Application

13/737,614Filed 9 Jan 2013

Priority

KR 10-2012-014347011 Dec 2012

Published

US 2014/0160616 A112 Jun 2014

Granted

16 Dec 2014

Term ends

11 Jan 2033

Estimated · how

20 years from earliest known nonprovisional domestic filing plus recorded patent term adjustment, including 2 days of adjustment. Maintenance-fee lapses, terminal disclaimers and statutory extensions have not been checked. The continuity chain may be incomplete; this is not an enforceability determination.

Classification7 codes

H01G 4/12
Inorganic dielectrics: ceramic dielectrics
H01G 4/012
Electrodes: form of non-self-supporting electrodes
H01G 4/228
Details: terminals
Y10T 29/43
Metal working: electric condenser making

Timeline

11 Dec 2012Priority claimedKR 10-2012-0143470
9 Jan 2013Application filedUS 13/737,614
14 Jan 2013Assigned to Samsung Electro-Mechanics Co., Ltd.assignment of assignor's interest
12 Jun 2014PublishedUS 2014/0160616 A1
16 Dec 2014GrantedUS 8,913,367 B2
12 Oct 2026TodayWithin its term
11 Jan 2033Term endsEstimated, includes 2 days of adjustment

Multilayered ceramic capacitor and method of manufacturing the same

Life of this patent

Multilayered ceramic capacitor and method of manufacturing the same

Life of this patent

Life of this patent

Abstract

Drawings

Drawings

Claims10

Description4,779 words

Drawings

Classification7 codes

Life of this patent

Description4,779 words