Multilayer ceramic capacitor and preparation method thereof

A technology of multilayer ceramics and capacitors, applied in the direction of capacitor manufacturing, multilayer capacitors, capacitors, etc., can solve the problems of increasing product loss value, increasing operation process, production cycle and cost impact, etc., to improve strength defects, improve bending resistance, etc. Strength and flexural strength, effect of improving flexural and flexural strength

Pending Publication Date: 2020-03-06
深圳三环电子有限公司 +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

This solution has the following disadvantages: 1) The cost of precious metal resin paste is high, and it is prone to problems such as poor tinning in electroplating; 2) The technical requirements for drying and co-firing of flexible terminals are fine, which generally increases the loss value of the product; 3) The product The production increase operation process h

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  • Multilayer ceramic capacitor and preparation method thereof
  • Multilayer ceramic capacitor and preparation method thereof
  • Multilayer ceramic capacitor and preparation method thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0059] The structure diagram of the multilayer ceramic capacitor described in this embodiment is shown in figure 1 , the multilayer ceramic capacitor includes an effective electrode layer 1 and a reinforcement body 2, the reinforcement body 2 is arranged on the upper surface and the lower surface of the effective electrode layer 1, and the reinforcement body 2 is formed by stacking a plurality of reinforcement body units; The effective electrode layer 1 is formed by dislocation stacking of a plurality of effective electrode units, the effective electrode unit and the reinforcing body unit are stacked to form two end faces, and the two end faces are respectively in contact with the end electrodes 3 .

[0060] The reinforcement unit includes a high-strength material layer and a ceramic medium layer; the material of the high-strength material layer includes high-strength materials and auxiliary materials, and the high-strength materials include zirconia, alumina, calcium zirconate...

Embodiment 2

[0070] The structure diagram of the multilayer ceramic capacitor described in this embodiment is shown in figure 2, the multilayer ceramic capacitor includes an effective electrode layer 1 and a reinforcing body 2, the reinforcing body 2 is arranged on the upper surface, the lower surface of the effective electrode layer 1 and the inside of the effective electrode layer 1, and the reinforcing body 2 is composed of a plurality of reinforcing Body units are stacked; the effective electrode layer 1 is formed by dislocation stacking of a plurality of effective electrode units, the effective electrode unit and the reinforcing body unit are stacked to form two end faces, and the two end faces are respectively in contact with the end electrodes 3 .

[0071] The reinforcement unit includes a high-strength material layer and a ceramic medium layer; the material of the high-strength material layer includes high-strength materials and auxiliary materials, and the high-strength materials ...

Embodiment 3

[0081] In order to explore the impact of the thickness of the high-strength material layer and the ceramic dielectric layer on the performance of the multilayer ceramic capacitor, the multilayer ceramic capacitor structure according to embodiment 1 and embodiment 2 is changed. The thickness ratio setting table of the high-strength material layer and the ceramic dielectric layer Test groups 1 to 8 and control groups 1 to 3 in 3, change the thickness ratio of the high-strength material layer and the ceramic dielectric layer according to the multilayer ceramic capacitor structure described in embodiment 2, and set test groups 9 to 16 and the control group in table 3 4-6. Multilayer ceramic capacitors are manufactured according to the chip capacity of 0805 specifications, wherein the high-strength material layer contains the following components in parts by weight: 83 parts of calcium zirconate, 2 parts of zirconia, 2 parts of alumina, and 13 parts of auxiliary materials The auxili...

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Abstract

The invention discloses a multilayer ceramic capacitor, which comprises an effective electrode layer and a reinforcing body. The reinforcing body is arranged on at least one of the upper surface of the effective electrode layer, the inner side of the effective electrode layer and the lower surface of the effective electrode layer; the two end surfaces of the effective electrode layer and the two end surfaces the reinforcing body are in contact with end electrodes respectively; and the reinforcing body is formed by stacking a plurality of reinforcing body units, wherein each reinforcing body unit comprises a high-strength material layer and a ceramic dielectric layer, the strength of a main body material of the high-strength material layer being greater than that of a main body material ofthe ceramic dielectric layer. According to the multilayer ceramic capacitor, the high-strength material layers are uniformly distributed in the ceramic dielectric layer of the MLCC, so that the breaking strength and the bending strength of the MLCC are greatly improved on the premise of ensuring the original electrical performance of the capacitor. The invention further discloses a preparation method of the multilayer ceramic capacitor. The distribution of the reinforcing materials in the conventional dielectric layer is realized by adopting a secondary tape casting or silk-screen printing process, and more accurate and reasonable preparation of the reinforcing body can be realized.

Description

technical field [0001] The invention relates to a capacitor and a preparation method thereof, in particular to a high-strength multilayer ceramic capacitor and a preparation method thereof. Background technique [0002] Multilayer ceramic capacitors are mainly divided into two categories, Class I high-frequency ceramic capacitors and Class II high-dielectric ceramic capacitors. Among them, for Class II high-dielectric ceramic capacitors, due to the low strength of the ceramic dielectric material used, it is easy to cause vibration during use, such as welding, splitting boards, or stress or temperature fluctuations, resulting in fracture. [0003] In order to solve the above problems, at this stage, design methods such as flexible terminals or welding metal shrapnel are used to reduce stress and improve the fracture problem caused during product use. Among them, the design of the precious metal soft terminal is to add a layer of flexible precious metal plus conductive resin ...

Claims

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Application Information

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IPC IPC(8): H01G4/12H01G4/30H01G13/00
CPCH01G4/1245H01G4/30H01G13/00
Inventor 张禧翀
Owner 深圳三环电子有限公司
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