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Multilayer ceramic capacitor

A technology of multilayer ceramics and capacitors, applied in the direction of multilayer capacitors, fixed capacitor electrodes, fixed capacitor parts, etc., can solve the problem of reducing the use range of multilayer ceramic capacitors, increasing the size of multilayer ceramic capacitors, and increasing the process Difficulty and cost issues, to achieve the effect of increasing the range of use, increasing the capacitance, and improving the breakdown strength

Active Publication Date: 2016-11-23
TSINGHUA UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] Although the multilayer ceramic capacitor in the prior art adopts multilayer electrode layer stacking to increase the capacitance, in order to obtain a larger value of capacitance, it is necessary to greatly increase the number of electrode plates, so that the size of the multilayer ceramic capacitor Especially the increase in the thickness direction is not conducive to its use, and increases the difficulty and cost of the process; in addition, as the number of sub-capacitors in parallel increases, the withstand voltage performance of the multilayer ceramic capacitor will decrease accordingly. Reduced range of use of multilayer ceramic capacitors

Method used

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Examples

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Embodiment 1

[0036] see figure 2 , Embodiment 1 of the present invention provides a multilayer ceramic capacitor 100 , which includes a ceramic body 10 and two external electrodes 30 disposed at opposite ends of the ceramic body 10 . The ceramic body 10 includes at least one first electrode layer 11 , at least one second electrode layer 13 and a dielectric material 12 . The at least one first electrode layer 11 and the at least one second electrode layer 13 are stacked and spaced apart. The dielectric material 12 is filled around the at least one first electrode layer 11 and the at least one second electrode layer 13 so that the adjacent first electrode layer 11 and the second electrode layer 13 are spaced apart. The at least one first electrode layer 11 is electrically connected to the external electrode 30 , and the at least one second electrode layer 13 is not electrically connected to the external electrode 30 . The first electrode layer 11 includes two interdigital electrodes, and ...

Embodiment 2

[0043] see Figure 6 , Embodiment 2 of the present invention provides a multilayer ceramic capacitor 200 , which includes a ceramic body 20 and two external electrodes 30 disposed at opposite ends of the ceramic body 20 . The ceramic body 20 includes at least one first electrode layer 21 , at least one second electrode layer 23 and a dielectric material 22 . The at least one first electrode layer 21 and the at least one second electrode layer 23 are stacked and spaced apart. The dielectric material 22 is filled around the at least one first electrode layer 21 and the at least one second electrode layer 23 so that the adjacent first electrode layer 21 and the second electrode layer 23 are spaced apart. The at least one first electrode layer 21 is electrically connected to the two external electrodes 30 , and the at least one second electrode layer 23 is not electrically connected to the two external electrodes 30 . The first electrode layer 21 includes three interdigital elec...

Embodiment 3

[0052] Embodiment 3 of the present invention provides a multilayer ceramic capacitor 300 . The basic structure of the multilayer ceramic capacitor 300 provided in this embodiment 3 is basically the same as the basic structure of the multilayer ceramic capacitor 100 provided in this embodiment 1. The structure is different from that of the interdigital portion of the interdigital electrode in Example 1.

[0053] Specifically, see Figure 10 In this embodiment, the first electrode layer 31 includes a first interdigital electrode 31a and a second interdigital electrode 31b. The first interdigital electrode 31 a and the second interdigital electrode 31 b are spaced apart from each other by a dielectric material 32 . The first interdigital electrode 31a includes a first connecting portion 311a and a plurality of first interdigital portions 312a disposed on the first connecting portion 311a. The first finger portion 312a includes a main finger portion 3121a and at least one finge...

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Abstract

The invention discloses a multilayer ceramic capacitor. The multilayer ceramic capacitor comprises a ceramic body, and two external electrodes arranged at two opposite ends of the ceramic body, wherein the ceramic body comprises at least one first electrode layer, at least one second electrode layer, and a dielectric material, wherein the at least one first electrode layer and the at least one second electrode layer are arranged at an interval, the dielectric material fills around the at least one first electrode layer and the at least one second electrode layer so as to enable the first electrode layer and the second electrode layer adjacent to each other to be arranged at the interval, the at least one first electrode layer is electrically connected with the external electrode, the at least one second electrode layer is not electrically connected with the external electrode, the first electrode layer comprises at least two interdigital electrodes, the second electrode layer comprises at least one interdigital electrode, and the projections of the interdigital electrodes of the adjacent first electrode layers and the interdigital electrodes of the second electrode layer overlap at least in part in the laminating direction of the at least one first electrode layer and at least one second electrode layer.

Description

technical field [0001] The invention relates to the technical field of high-performance capacitors, in particular to a multilayer ceramic capacitor with large capacitance and high voltage resistance. Background technique [0002] Multilayer ceramic capacitors generally consist of a ceramic body consisting of a plurality of electrode layers and a dielectric material, and external electrodes. A plurality of electrode layers are alternately arranged and arranged at intervals through a dielectric material. A plurality of electrode layers are electrically connected with external electrodes to realize the parallel connection of the sub-capacitors to increase the capacitance of the multilayer ceramic capacitor. see figure 1 , the multilayer ceramic capacitor 100' in the prior art includes a ceramic body 1 and two external electrodes 2. The ceramic body 1 includes at least one first electrode layer 3 , at least one second electrode layer 5 and a dielectric material 4 . The at le...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01G4/30H01G4/012
CPCH01G4/012H01G4/30
Inventor 褚祥诚张毅
Owner TSINGHUA UNIV