News Column

"Multi-Layered Ceramic Electronic Component" in Patent Application Approval Process

June 27, 2014



By a News Reporter-Staff News Editor at Health & Medicine Week -- A patent application by the inventors CHOI, Sung Hyuk (Suwon, KR); YOON, Byung Kwon (Suwon, KR); KIM, Sang Hyuk (Suwon, KR), filed on December 21, 2012, was made available online on June 12, 2014, according to news reporting originating from Washington, D.C., by NewsRx correspondents (see also Samsung Electro-mechanics Co., Ltd.).

This patent application is assigned to Samsung Electro-mechanics Co., Ltd.

The following quote was obtained by the news editors from the background information supplied by the inventors: "The present invention relates to a multi-layered ceramic electronic component capable of reducing short circuit defects between internal electrodes and acoustic noise generated in the multi-layered ceramic electronic component when voltage is applied thereto.

"Examples of electronic components using a ceramic material include a capacitor, an inductor, a piezoelectric material, a varistor, thermistor, or the like.

"Among these ceramic electronic components, a multi-layered ceramic capacitor (MLCC) has advantages such as small size, high capacitance, ease of mounting, and the like.

"Multi-layered ceramic capacitors are chip-type condensers mounted on the circuit boards of various electronic products such as computers, personal digital assistants (PDAs), and cellular phones, performing an important role in charging and discharging electricity, and have various sizes and multi-layered forms, according to intended use and capacity.

"Particularly, recently, in accordance with the miniaturization of electronic product, providing multi-layered ceramic capacitors used in electronic products with a subminiature size and ultra high capacitance has been demanded.

"Therefore, multi-layered ceramic capacitors in which thicknesses of the dielectric layers and internal electrodes are thinned for the micro-miniaturization of electronic products and in which a relatively large number of dielectric layers are stacked for super high capacitance have been manufactured.

"Meanwhile, in the case of a multi-layered ceramic capacitor having a structure in which all external electrodes are positioned on a lower surface, such a multi-layered ceramic capacitor has excellent mounting density and capacitance and low equivalent series inductance (ESL), but short circuit defects between internal electrodes by a pushing phenomenon of the internal electrodes facing each other due to cutting stress generated at the time of cutting a ceramic body may be easily generated."

In addition to the background information obtained for this patent application, NewsRx journalists also obtained the inventors' summary information for this patent application: "An aspect of the present invention provides a multi-layered ceramic electronic component capable of reducing short circuit defects between internal electrodes and acoustic noise generated in the multi-layered ceramic electronic component when voltage is applied thereto.

"According to an aspect of the present invention, there is provided a multi-layered ceramic electronic component including: a ceramic body including a dielectric layer and having first and second main surfaces opposing each other, first and second side surfaces opposing each other, and first and second end surfaces opposing each other; a first internal electrode having an overlapping region provided in the ceramic body so as to form a capacitance formation part and exposed to the first and second side surfaces and a first lead-out part extended from the capacitance part so as to be exposed to the second side surface; a second internal electrode alternately multi-layered with the first internal electrode so as to be exposed to the first and second side surfaces, having the dielectric layer therebetween, and insulated from the first internal electrode, and including the second lead-out part extended from the capacitance part so as to be exposed to the first side surface; first and second external electrodes connected to the first and second lead-out parts, respectively; and insulation layers formed on the first and second side surfaces of the ceramic body, wherein the first and second lead-out parts are regions in which the first and second internal electrodes are not overlapped with each other.

"When a length of the ceramic body in a length direction is defined as L, and a width of a margin part corresponding to a region in which the internal electrode is not formed, in the length direction of the ceramic body is defined as Lm, 0.03.ltoreq.Lm/L.ltoreq.0.2 may be satisfied.

"When a length of the ceramic body in a length direction is defined as L, and a length of a non-overlapping region in the length direction of the ceramic body is defined as Lc, 0.05--Lc/L.ltoreq.0.4 may be satisfied.

"When a width of the ceramic body in a width direction is defined as W, and a width of a non-overlapping region in the width direction of the ceramic body is defined as Wc, 0.05.ltoreq.Wc/W.ltoreq.0.5 may be satisfied.

"The first external electrode may be extended to at least one of the first main surface, the second main surface, and the first side surface of the ceramic body.

"The second external electrode may be extended to at least one of the first main surface, the second main surface, and the second side surface of the ceramic body.

"The insulation layer may include at least one selected from a group consisting of an epoxy, a heat resistant polymer, glass, and a ceramic.

"The insulation layer may cover the entire exposed portions of the first and second internal electrodes overlapped with each other.

"The insulation layer may have a thickness lower than those of the first and second external electrodes measured from the first side surface of the ceramic body.

"According to another aspect of the present invention, there is provided a multi-layered ceramic electronic component including: a ceramic body including a dielectric layer and having first and second main surfaces opposing each other, first and second side surfaces opposing each other, and first and second end surfaces opposing each other; a first internal electrode having an overlapping region provided in the ceramic body so as to form a capacitance formation part, exposed to the first and second side surfaces, and spaced apart from the first and second end surfaces by a predetermined interval, and including a first lead-out part extended from the capacitance part so as to be exposed to the second side surface; a second internal electrode alternately multi-layered with the first internal electrode, having the dielectric layer therebetween, exposed to the first and second side surfaces, spaced apart from the first and second end surfaces by a predetermined interval, and insulated from the first internal electrode, and including a second lead-out part extended from the capacitance part so as to be exposed to the first side surface; a first external electrode connected to the first lead-out part and formed on the first main surface and the second side surface and a second external electrode connected to the second lead-out part and formed on the first main surface and the first side surface; and insulation layers formed on the first and second side surfaces of the ceramic body, wherein the first and second lead-out parts are regions in which the first and second internal electrodes are not overlapped with each other.

"When a length of the ceramic body in a length direction is defined as L, and a width of a margin part corresponding to a region in which the internal electrode is not formed, in the length direction of the ceramic body is defined as Lm, 0.03.ltoreq.Lm/L.ltoreq.0.2 may be satisfied.

"When a length of the ceramic body in the length direction is defined as L, and a length of a non-overlapping region in the length direction of the ceramic body is defined as Lc, 0.05.ltoreq.Lc/L.ltoreq.0.4 may be satisfied.

"When a width of the ceramic body in a width direction is defined as W, and a width of a non-overlapping region in the width direction of the ceramic body is defined as Wc, 0.05.ltoreq.Lc/W.ltoreq.0.5 may be satisfied.

"The insulation layer may include at least one selected from a group consisting of an epoxy, a heat resistant polymer, glass, and a ceramic.

"The insulation layer may cover the entire exposed portions of the first and second internal electrodes.

"The insulation layer may have a thickness lower than those of the first and second external electrodes measured from the first side surface of the ceramic body.

BRIEF DESCRIPTION OF THE DRAWINGS

"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 perspective view showing a schematic structure of a multi-layered ceramic capacitor according to an embodiment of the present invention;

"FIG. 2 is an exploded perspective view of FIG. 1;

"FIG. 3 is a cross-sectional view showing a structure in which a first internal electrode and a first external electrode of FIG. 1 are coupled to each other;

"FIG. 4 is a cross-sectional view showing a structure in which a second internal electrode and a second external electrode of FIG. 1 are coupled to each other;

"FIG. 5 is a cross-sectional view showing a structure in which the first and second internal electrodes and the first and second external electrodes of FIG. 1 are coupled to each other; and

"FIG. 6 is a schematic view schematically showing an internal structure of the multi-layered ceramic capacitor when viewed from a first side of FIG. 1."

URL and more information on this patent application, see: CHOI, Sung Hyuk; YOON, Byung Kwon; KIM, Sang Hyuk. Multi-Layered Ceramic Electronic Component. Filed December 21, 2012 and posted June 12, 2014. Patent URL: http://appft.uspto.gov/netacgi/nph-Parser?Sect1=PTO2&Sect2=HITOFF&u=%2Fnetahtml%2FPTO%2Fsearch-adv.html&r=4318&p=87&f=G&l=50&d=PG01&S1=20140605.PD.&OS=PD/20140605&RS=PD/20140605

Keywords for this news article include: Microtechnology, Electronic Components, Samsung Electro-mechanics Co. Ltd.

Our reports deliver fact-based news of research and discoveries from around the world. Copyright 2014, NewsRx LLC


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Source: Health & Medicine Week


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