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Researchers Submit Patent Application, "Multilayer Ceramic Electronic Component and Manufacturing Method Thereof", for Approval

July 16, 2014



By a News Reporter-Staff News Editor at Electronics Newsweekly -- From Washington, D.C., VerticalNews journalists report that a patent application by the inventor KIM, Hyung Joon (Suwon, KR), filed on February 27, 2013, was made available online on July 3, 2014.

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 to a multilayer ceramic electronic component having excellent reliability and a manufacturing method thereof.

"Recently, as electronic products have been reduced in size, multilayer ceramic electronic components have also been required to be reduced in size and have a large capacity.

"Thus, dielectric layers and internal electrodes have been attempted to be thinned and stacked in larger amounts according to various methods, and recently, multilayer ceramic electronic components having a larger number of laminations by reducing a thickness of dielectric layers have been manufactured.

"Meanwhile, a multilayer ceramic electronic component, in particular, a multilayer ceramic capacitor, is manufactured by printing an internal electrode, smaller than an area of a ceramic sheet or a substrate sheet and having a predetermined thickness, on the ceramic sheet or the substrate sheet, and laminating the sheets, and as an amount of laminations is increased, steps formed by margin portions are increased.

"Thus, since the steps formed by the margin portions are increased according to an increase in the lamination amount, dielectric layers and internal electrodes are unbalanced, resulting in a degradation of electrical characteristics.

"Also, as the lamination amount is increased, the electrodes within a multilayer ceramic capacitor may be warped in the direction of end portions of a ceramic body due to the steps, and thus, delamination occurs when the ceramic body is cut.

"The related art document below discloses a technique of laminating internal electrodes such that positions of the internal electrodes deviate in a width direction of a ceramic body, but it is not a basic solution to the foregoing problem.

"Thus, a method for solving the problem of delamination in cutting and a problem resulting from an increase in the steps formed by the margin portion when cut is required."

As a supplement to the background information on this patent application, VerticalNews correspondents also obtained the inventor's summary information for this patent application: "An aspect of the present invention provides a multilayer ceramic electronic component having excellent reliability and a manufacturing method thereof.

"According to an aspect of the present invention, there is provided a multilayer ceramic electronic component including: a ceramic body including a plurality of dielectric layers; and a plurality of first and second internal electrodes disposed to face each other with the dielectric layer interposed therebetween within the ceramic body and having different widths, wherein three or more of the plurality of first and second internal electrodes form a single block, the blocks are iteratively laminated, and when the longest distance between the uppermost internal electrode and the lowermost internal electrode, among the plurality of first and second internal electrodes 121 and 122, is T1 and the shortest distance therebetween is T2, 0.76.ltoreq.T2/T1.ltoreq.0.97 is satisfied.

"An amount of the blocks may be 5 or more.

"When the longest distance between the uppermost internal electrode and the lowermost internal electrode, among the plurality of first and second internal electrodes 121 and 122, is T1 and the shortest distance therebetween is T2, 0.85.ltoreq.T2/T1.ltoreq.0.90 may be satisfied.

"A lamination amount of the plurality of first and second internal electrodes may be 150 layers or more.

"The internal electrodes may include one or more metals selected from the group consisting of palladium (Pd), a palladium-silver (Pd--Ag) alloy, nickel (Ni), and copper (Cu).

"According to another aspect of the present invention, there is provided a method for manufacturing a multilayer ceramic electronic component, including:

"preparing a plurality of ceramic green sheets with slurry including ceramic powder; forming first and second internal electrode patterns having different widths with a conductive paste including a metal powder on the plurality of ceramic green sheets; laminating three or more of the plurality of ceramic green sheets to form a plurality of block laminates; and laminating the plurality of block laminates and firing the same to form a ceramic body including a plurality of first and second internal electrodes, wherein when the longest distance between the uppermost internal electrode and the lowermost internal electrode, among the plurality of first and second internal electrodes 121 and 122, within the ceramic body is T1 and the shortest distance therebetween is T2, 0.76.ltoreq.T2/T1.ltoreq.0.97 is satisfied.

"The method may further include compressing the block laminates after the forming of the plurality of block laminates.

"The first and second internal electrode patterns may be disposed to have the same form within the respective blocks.

"An amount of the block laminates may be 5 or more.

"When the longest distance between the uppermost internal electrode and the lowermost internal electrode, among the plurality of first and second internal electrodes, is T1 and the shortest distance therebetween is T2, 0.85.ltoreq.T2/T1.ltoreq.0.90 may be satisfied.

"A lamination amount of the plurality of first and second internal electrodes may be 150 layers or more.

"The metal powder may include one or more selected from the group consisting of palladium (Pd), a palladium-silver (Pd--Ag) alloy, nickel (Ni), and copper (Cu).

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 schematic perspective view of a multilayer ceramic capacitor (MLCC) according to an embodiment of the present invention;

"FIG. 2 is a schematic perspective view of a ceramic body of the MLCC according to an embodiment of the present invention;

"FIG. 3 is a cross-sectional view taken along line A-A' in FIG. 2;

"FIG. 4 is a schematic perspective view of a ceramic body of an MLCC according to another embodiment of the present invention;

"FIG. 5 is a cross-sectional view taken along line A-A' in FIG. 4; and

"FIG. 6 is a flow chart illustrating a process of a manufacturing an MLCC according to another embodiment of the present invention."

For additional information on this patent application, see: KIM, Hyung Joon. Multilayer Ceramic Electronic Component and Manufacturing Method Thereof. Filed February 27, 2013 and posted July 3, 2014. Patent URL: http://appft.uspto.gov/netacgi/nph-Parser?Sect1=PTO2&Sect2=HITOFF&u=%2Fnetahtml%2FPTO%2Fsearch-adv.html&r=4910&p=99&f=G&l=50&d=PG01&S1=20140626.PD.&OS=PD/20140626&RS=PD/20140626

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

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Source: Electronics Newsweekly


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