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Multilayer Ceramic Capacitors

A technology of laminated ceramics and capacitors, which is applied in the direction of laminated capacitors, fixed capacitor electrodes, fixed capacitor dielectrics, etc., can solve the problems that are difficult to meet the needs of miniaturization and large capacitance, and achieve miniaturization and large capacitance, Effect of reducing mechanical strain and suppressing vibration

Active Publication Date: 2016-04-20
TAIYO YUDEN KK
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] However, according to the above method (1), since the number of internal electrode layers and dielectric layers cannot be avoided to increase the number of layers in order to secure a large capacitance, it is difficult to meet the demands for miniaturization and high capacitance in recent years.
Furthermore, according to the above-mentioned method (2), since it is inevitable to increase the size of the multilayer ceramic capacitor in order to secure a large electrostatic capacitance, it is difficult to meet the demand for miniaturization and increase in capacitance in recent years.

Method used

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  • Multilayer Ceramic Capacitors
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  • Multilayer Ceramic Capacitors

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no. 1 approach 》

[0070]

[0071] First, the structure of multilayer ceramic capacitor 10-1 will be described. figure 1 (A) and figure 1 The multilayer ceramic capacitor 10-1 shown in (B) includes: a capacitor body 11 having a substantially cuboid shape, and the reference dimensions of length, width, and height have a relationship of length>width=height, or a relationship of length>width>height; and A pair of external electrodes 12 are provided at both ends in the longitudinal direction of the capacitor body 11 .

[0072] Capacitor body 11 has a structure in which 26 internal electrode layers 13 are laminated with dielectric layer 14 interposed therebetween, and there are boundaries (unsigned) where only dielectric layer 14 is laminated on the upper and lower sides in the height direction. The actual number of internal electrode layers in an actual laminated ceramic capacitor to cope with miniaturization and increase in capacitance is 100 or more. However, since there is also a relationship ...

no. 2 approach 》

[0093] First, the structure of multilayer ceramic capacitor 10-2 will be described. Figure 5 (A), and Figure 5 The multilayer ceramic capacitor 10-2 shown in (B) is structurally different from the multilayer ceramic capacitor 10-1 of the first embodiment as follows: Figure 5 As shown, among the 26 internal electrode layers 13, the 14-layer internal electrode layer 13 existing in the center of the lamination direction has the following second All parts 13b of the electrode part are isolated.

[0094] Image 6 (A) shows the 14-layer internal electrode layer 13 including all parts 13a of the first isolated electrode part and all parts 13b of the second isolated electrode part. Figure 5 The upper surface of the internal electrode layer 13 of the odd-numbered layer from the top, Image 6 (B) shows that in the 14-layer internal electrode layer 13 Figure 5 The upper surface of the internal electrode layer 13 of the even-numbered layer from the top. From these figures, it c...

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Abstract

The invention provides a laminated ceramic capacitor which can satisfy the requirements for miniaturization and large capacitance and can effectively inhibit vibration which causes sound. The central part of the 14th inner electrode layer (13) existing in the center of a lamination direction among 26 inner electrode layers (13) of the laminated ceramic capacitor (10-1) has all parts of a first isolated electrode part (13a) where a continuous electrode part (CEP) coexists with at least one isolated electrode part (IEP) which is not electrically continuous with the continuous electrode part (CEP).

Description

technical field [0001] The present invention relates to a multilayer ceramic capacitor including a capacitor body having a structure in which a plurality of internal electrode layers are laminated with a dielectric layer interposed therebetween. Background technique [0002] Such a multilayer ceramic capacitor will have an electrostrictive effect (Electrostrictive effect) in the dielectric layer interposed between the internal electrode layers due to the electric field generated between the facing parts of the adjacent internal electrode layers along the lamination direction. ) caused by mechanical strain, and vibration caused by this mechanical strain is generated in the multilayer ceramic capacitor. In addition, it is well known that the vibrations are the cause of the so-called buzzing that occurs when a multilayer ceramic capacitor is mounted on a circuit board. [0003] As a preferred method of suppressing the vibration (the ringing), the following methods are known, t...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01G4/005H01G4/30
CPCH01G4/12H01G4/232H01G4/30
Inventor 水野高太郎小西幸宏谷口克哉西川润重谷寿士粕谷雄一北村翔平小和濑裕介井上真希加藤洋一
Owner TAIYO YUDEN KK
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