News Column

Researchers Submit Patent Application, "Multilayer Ceramic Electronic Component", for Approval

July 4, 2014



By a News Reporter-Staff News Editor at Health & Medicine Week -- From Washington, D.C., NewsRx journalists report that a patent application by the inventors KIM, Wi Heon (Suwon, KR); KIM, Doo Young (Suwon, KR); CHOI, Jae Yeol (Suwon, KR), filed on February 5, 2013, was made available online on June 19, 2014 (see also Samsung Electro-mechanics Co., Ltd.).

The patent's assignee is Samsung Electro-mechanics Co., Ltd.

News editors obtained the following quote from the background information supplied by the inventors: "The present invention relates a multilayer ceramic electronic component capable of preventing a short circuit occurring between internal electrodes and reducing acoustic noise generated in multilayer ceramic electronic components during the application of voltage.

"A capacitor, an inductor, a piezoelectric element, a varistor, a thermistor, and the like, are representative electronic components using a ceramic material.

"Among these ceramic electronic components, a multilayer ceramic capacitor (MLCC) has a small size, is able to secure a high degree of capacitance, and has ease of mountability.

"This multilayer ceramic capacitor is a chip type condenser performing a main function of charging or discharging electricity while it is mounted on a circuit board of several types of electronic product, such as a computer, a personal digital assistant (PDA), a cellular phone, or the like. The multilayer ceramic capacitor has several sizes and lamination types, depending on the intended usage and required capacitance thereof.

"In particular, as the trend has been for electronic products to be reduced in size, ultra-miniaturization and the implementation of ultra-high capacitance in multi-layer ceramic capacitors have also been required.

"For this reason, a multi-layer ceramic capacitor in which dielectric layers and internal electrodes are thinly formed for ultra-miniaturization of products and in which a large number of dielectric layers are laminated for the ultra-high capacitance thereof has been manufactured.

"Meanwhile, there is provided a multilayer ceramic capacitor in which all external electrodes are positioned on a lower surface. In this structure of a multilayer ceramic capacitor, mounting density and capacitance thereof are excellent and ESL is low, but a short circuit between internal electrodes may easily occur due to a phenomenon in which facing internal electrodes are pushed by cutting stress at the time of cutting the ceramic body."

As a supplement to the background information on this patent application, NewsRx correspondents also obtained the inventors' summary information for this patent application: "An aspect of the present invention provides a multilayer ceramic electronic component capable of preventing a short circuit occurring between internal electrodes and reducing acoustic noise generated in a multilayer ceramic electronic component during the application of voltage thereto.

"According to an aspect of the present invention, there is provided a multilayer ceramic electronic component, including: a ceramic body including dielectric layers, 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 block including first and second internal electrodes having overlap regions which form a capacitance part for forming capacitance inside the ceramic body while the overlap regions are exposed to the first side surface, each of the first internal electrodes having a first lead out portion extended from the capacitance part so as to be exposed to the first side surface, the second internal electrodes being laminated alternately with the first internal electrodes having the dielectric layers interposed therebetween while being insulated from the first internal electrodes, each of the second internal electrodes having a second lead out portion extended from the capacitance part so as to be exposed to the first side surface; one or more second blocks each including third and fourth internal electrodes having overlap regions which form a capacitance part for forming capacitance inside the ceramic body, each of the third internal electrodes having a third lead out portion extended from the capacitance part so as to be exposed to the first side surface, the fourth internal electrodes being laminated alternately with the third internal electrodes having the dielectric layers interposed therebetween while being insulated from the third internal electrodes, each of the fourth internal electrodes having a fourth lead out portion extended from the capacitance part so as to be exposed to the first side surface; a first external electrode connected to the first and third lead out portions and a second external electrode connected to the second and fourth lead out portions; and an insulating layer formed on the first side surface of the ceramic body, wherein the second blocks are disposed above and below the first block.

"Here, a thickness of the first block may be 20 to 80% of an overall thickness of the first and second blocks in a cross section taken in length-thickness directions of the ceramic body.

"Here, a thickness of the second block may be 10 to 40% based on an overall thickness of the first and second blocks in a cross section taken in length-thickness directions of the ceramic body.

"The first to fourth internal electrodes may be disposed vertically with respect to a mounting surface of the ceramic body.

"The first 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 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 insulating layer may contain at least one selected from the group consisting of epoxy, a heat-resistant polymer, glass, and a ceramic material.

"The insulating layer may cover all exposed portions of the first and second internal electrodes.

"The insulating layer may be lower than a height 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 multilayer ceramic electronic component, including: a ceramic body including dielectric layers, 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 block including first and second internal electrodes having overlap regions which form a capacitance part for forming capacitance inside the ceramic body while the overlap regions are exposed to the first and second side surfaces, each of the first internal electrodes having a first lead out portion extended from the capacitance part so as to be exposed to the first and second side surfaces, the second internal electrodes being laminated alternately with the first internal electrodes having the dielectric layers interposed therebetween while being insulated from the first internal electrodes, each of the second internal electrodes having a second lead out portion extended from the capacitance part so as to be exposed to the first and second side surfaces; one or more second blocks each including third and fourth internal electrodes having overlap regions which form a capacitance part for forming capacitance inside the ceramic body, each of the third internal electrodes having a third lead out portion extended from the capacitance part so as to be exposed to the first and second side surfaces, the fourth internal electrodes being laminated alternately with the third internal electrodes having the dielectric layers interposed therebetween while being insulated from the third internal electrodes, each of the fourth internal electrodes having a fourth lead out portion extended from the capacitance part so as to be exposed to the first and second side surfaces; a first external electrode connected to the first and third lead out portions and a second external electrode connected to the second and fourth lead out portions; and an insulating layer formed on the first and second side surfaces of the ceramic body, wherein the second blocks are disposed above and below the first block.

"Here, a thickness of the first block may be 20 to 80% of an overall thickness of the first and second blocks in a cross section taken in length-thickness directions of the ceramic body.

"Here, a thickness of the second block may be 10 to 40% based on an overall thickness of the first and second blocks in a cross section taken in length-thickness directions of the ceramic body.

"The first and second internal electrodes may be disposed vertically with respect to a mounting surface of the ceramic body.

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

"The insulating layer may contain at least one selected from the group consisting of epoxy, a heat-resistant polymer, glass, and a ceramic.

"The insulating layer may cover all exposed portions of the first and second internal electrodes.

"The insulating layer may be lower than a height of the first and second external electrodes, measured from the first or second 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 multilayer ceramic capacitor according to one embodiment of the present invention;

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

"FIG. 3 is a cross-sectional view showing a combination structure of a first internal electrode and a first external electrode of FIG. 1;

"FIG. 4 is a cross-sectional view showing a combination structure of a second internal electrode and a second external electrode of FIG. 1;

"FIG. 5 is a cross-sectional view showing a combination structure of the first and second internal electrodes and the first and second external electrodes of FIG. 1;

"FIG. 6 is a cross-sectional view showing a combination structure of a third internal electrode and the first external electrode of FIG. 1;

"FIG. 7 is a cross-sectional view showing a combination structure of a fourth internal electrode and the second external electrode of FIG. 1;

"FIG. 8 is a cross-sectional view showing a combination structure of the third and fourth internal electrodes and the first and second external electrodes of FIG. 1;

"FIG. 9 is a schematic view showing an inner structure of the multilayer ceramic capacitor of FIG. 1, seen from a first side surface.;

"FIG. 10 is a perspective view showing a schematic structure of a multilayer ceramic capacitor according to another embodiment of the present invention;

"FIG. 11 is a cross-sectional view showing a combination structure of a first internal electrode and a first external electrode of FIG. 10;

"FIG. 12 is a cross-sectional view showing a combination structure of a second internal electrode and a second external electrode, of FIG. 10;

"FIG. 13 is a cross-sectional view showing a combination structure of the first and second internal electrodes and the first and second external electrodes of FIG. 10;

"FIG. 14 is a cross-sectional view showing a combination structure of a third internal electrode and the first external electrode of FIG. 10;

"FIG. 15 is a cross-sectional view showing a combination structure of a fourth internal electrode and the second external electrode of FIG. 10; and

"FIG. 16 is a cross-sectional view showing a combination structure of the third and fourth internal electrodes and the first and second external electrodes of FIG. 10."

For additional information on this patent application, see: KIM, Wi Heon; KIM, Doo Young; CHOI, Jae Yeol. Multilayer Ceramic Electronic Component. Filed February 5, 2013 and posted June 19, 2014. Patent URL: http://appft.uspto.gov/netacgi/nph-Parser?Sect1=PTO2&Sect2=HITOFF&u=%2Fnetahtml%2FPTO%2Fsearch-adv.html&r=4630&p=93&f=G&l=50&d=PG01&S1=20140612.PD.&OS=PD/20140612&RS=PD/20140612

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


For more stories covering the world of technology, please see HispanicBusiness' Tech Channel



Source: Health & Medicine Week