MLCC capacitor

Abstract

The utility model discloses an MLCC capacitor, which comprises a first outer electrode, a second outer electrode and a multi-layer conductor structure, wherein the multi-layer conductor structure is formed by alternately stacking a first inner electrode layer, a ceramic material layer and a second inner electrode layer up and down in sequence; the first outer electrode and the second outer electrode are arranged left and right, the first inner electrode layer and the second inner electrode layer are the same in structure, each of the first inner electrode layer and the second inner electrode layer comprises a transverse part and a vertical part which are arranged in a T shape, and the transverse part of the first inner electrode layer is connected with the first outer electrode; the front and rear ends of the transverse part of the first inner electrode layer are respectively flush with the front and rear ends of the ceramic material layer; the transverse part of the second inner electrode layer is connected with the second outer electrode, and the front and rear ends of the transverse part of the second inner electrode layer are flush with the front and rear ends of the ceramic material layer respectively. According to the utility model, the phenomenon of poor chamfer leading-out caused by contraction of the inner electrode in the sintering process can be avoided, and the product reliability can be improved.

Description

Technical Field

[0001] This utility model relates to the field of MLCC (multilayer ceramic chip capacitor) technology, and in particular to an MLCC capacitor. Background Technology

[0002] In existing MLCC (multilayer ceramic chip) capacitors, the internal electrode structure typically adopts a rectangular design. The rectangular internal electrode connects to the external electrode. After sintering, the internal electrode often shrinks to varying degrees, reducing the contact area between the internal and external electrodes. This can lead to poor chamfering and lead-out issues in subsequent processing, resulting in decreased energy storage efficiency and performance instability. Furthermore, in large-size, high-voltage products, the rectangular internal electrode design makes the external electrode prone to ceramic body fracture under mechanical stress, resulting in low mechanical strength and affecting the capacitor's reliability. Utility Model Content

[0003] The purpose of this invention is to provide an MLCC capacitor that can avoid the phenomenon of poor chamfering and lead-out due to the shrinkage of the internal electrode during the sintering process, and at the same time improve the mechanical strength of large-size high-voltage products.

[0004] To achieve the above objectives, the technical solution adopted by this utility model is as follows:

[0005] An MLCC capacitor includes a first external electrode, a second external electrode, and a multilayer conductive structure formed by alternating stacking of a first internal electrode layer, a ceramic material layer, and a second internal electrode layer. The first and second external electrodes are arranged horizontally. The first and second internal electrode layers have identical structures, each including a T-shaped horizontal portion and a vertical portion. The horizontal portion of the first internal electrode layer is connected to the first external electrode, and its front and rear ends are flush with the front and rear ends of the ceramic material layer, respectively. The horizontal portion of the second internal electrode layer is connected to the second external electrode, and its front and rear ends are flush with the front and rear ends of the ceramic material layer, respectively.

[0006] As a preferred embodiment of this utility model, the vertical part is provided with a vertical edge.

[0007] As a preferred embodiment of this utility model, the vertical part is composed of multiple vertical sides, which are arranged in parallel intervals.

[0008] As a preferred embodiment of this utility model, the vertical side is provided in two parts.

[0009] As a preferred embodiment of this utility model, the vertical side is provided with three sides.

[0010] The advantages of implementing the MLCC capacitor provided by this utility model compared with the prior art are as follows:

[0011] The first inner electrode layer and the second inner electrode layer have the same structure and both include a horizontal part and a vertical part arranged in a T-shape. The horizontal part of the first inner electrode layer is connected to the first outer electrode, and the front and rear ends of the horizontal part of the first inner electrode layer are flush with the front and rear ends of the ceramic material layer, respectively. The horizontal part of the second inner electrode layer is connected to the second outer electrode, and the front and rear ends of the horizontal part of the second inner electrode layer are flush with the front and rear ends of the ceramic material layer, respectively. Therefore, the contact area between the inner electrode and the outer electrode can be increased, avoiding the phenomenon of poor chamfering due to shrinkage of the inner electrode during the sintering process, which would otherwise cause a decrease in the energy storage efficiency and unstable performance of the MLCC capacitor. Attached Figure Description

[0012] To more clearly illustrate the technical solutions of the embodiments of this utility model, the accompanying drawings of the embodiments will be briefly described below.

[0013] Figure 1 This is a schematic diagram of the structure of an MLCC capacitor provided in Embodiment 1 of this utility model;

[0014] Figure 2 This is a schematic diagram of the structure of the first inner electrode layer, the ceramic material layer, and the second inner electrode layer in Embodiment 1 of this utility model when they are stacked alternately.

[0015] Figure 3 This is a schematic diagram of the structure of the first inner electrode layer or the second inner electrode layer in Embodiment 1 of this utility model;

[0016] Figure 4 This is a schematic diagram of the structure of the first inner electrode layer or the second inner electrode layer in Embodiment 2 of this utility model;

[0017] Figure 5 This is a schematic diagram of the structure of the first inner electrode layer or the second inner electrode layer in Embodiment 3 of this utility model.

[0018] Marked in the image:

[0019] 1. First external electrode; 2. Second external electrode; 3. Multilayer conductive structure; 31. First inner electrode layer; 32. Ceramic material layer; 33. Second inner electrode layer; 4. Horizontal part; 5. Vertical part; 5a. Vertical edge. Detailed Implementation

[0020] The specific embodiments of this utility model will be described in further detail below with reference to the accompanying drawings and examples. The following examples are used to illustrate this utility model, but are not intended to limit its scope.

[0021] In the description of this utility model, it should be understood that the terms "upper," "lower," "left," "right," "front," "rear," "top," and "bottom," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing this utility model and for simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model. It should also be understood that the terms "first," "second," etc., are used in this utility model to describe various information, but this information should not be limited to these terms. These terms are only used to distinguish information of the same type from each other. For example, without departing from the scope of this utility model, "first" information can also be referred to as "second" information, and similarly, "second" information can also be referred to as "first" information.

[0022] Example 1

[0023] Please see Figures 1 to 3 A preferred embodiment of this utility model provides an MLCC capacitor, which includes a first external electrode 1, a second external electrode 2, and a multilayer conductive structure 3 formed by alternating stacking of a first inner electrode layer 31, a ceramic material layer 32, and a second inner electrode layer 33. The first external electrode 1 and the second external electrode 2 are arranged horizontally. The first inner electrode layer 31 and the second inner electrode layer 33 have the same structure. Both the first inner electrode layer 31 and the second inner electrode layer 33 include a T-shaped horizontal portion 4 and a vertical portion 5. The horizontal portion 4 of the first inner electrode layer 31 is connected to the first external electrode 1, and the front and rear ends of the horizontal portion 4 of the first inner electrode layer 31 are flush with the front and rear ends of the ceramic material layer 32, respectively. The horizontal portion 4 of the second inner electrode layer 33 is connected to the second external electrode 2, and the front and rear ends of the horizontal portion 4 of the second inner electrode layer 33 are flush with the front and rear ends of the ceramic material layer 32, respectively. In this embodiment, the vertical portion 5 has a vertical edge 5a.

[0024] According to the MLCC capacitor of this utility model, the first inner electrode layer 31 and the second inner electrode layer 33 have the same structure and both include a horizontal part 4 and a vertical part 5 arranged in a T-shape. The horizontal part 4 of the first inner electrode layer 31 is connected to the first outer electrode 1, and the front and rear ends of the horizontal part 4 of the first inner electrode layer 31 are flush with the front and rear ends of the ceramic material layer 32, respectively. The horizontal part 4 of the second inner electrode layer 33 is connected to the second outer electrode 2, and the front and rear ends of the horizontal part 4 of the second inner electrode layer 33 are flush with the front and rear ends of the ceramic material layer 32, respectively. Therefore, the contact area between the inner electrode and the outer electrode can be increased, avoiding the phenomenon of poor chamfering due to shrinkage of the inner electrode during the sintering process, thereby causing a decrease in the energy storage efficiency and unstable performance of the MLCC capacitor.

[0025] Example 2

[0026] The only difference compared to Embodiment 1 is that, in this embodiment, as... Figure 4 As shown, the vertical portion 5 is composed of multiple vertical edges 5a, which are arranged in parallel intervals; preferably, there are two vertical edges 5a. Therefore, since a gap is formed between the two vertical edges 5a, the internal stress generated by the shrinkage of the inner electrode during sintering can be further reduced, thereby improving the reliability of the product.

[0027] Example 3

[0028] The only difference compared to Embodiment 1 is that, in this embodiment, as... Figure 5 As shown, the vertical portion 5 is composed of multiple vertical edges 5a, which are arranged in parallel intervals; preferably, there are three vertical edges 5a. Therefore, since a gap is formed between adjacent vertical edges 5a in the three vertical edges 5a, the internal stress generated by the shrinkage of the internal electrode during sintering can be further reduced, thereby improving the reliability of the product.

[0029] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "connected" and "linked" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0030] The above description is only a preferred embodiment of the present utility model. It should be noted that for those skilled in the art, several improvements and substitutions can be made without departing from the technical principles of the present utility model, and these improvements and substitutions should also be considered within the protection scope of the present utility model.

Claims

1. An MLCC capacitor, comprising a first external electrode, a second external electrode, and a multilayer conductive structure formed by alternating stacking of a first internal electrode layer, a ceramic material layer, and a second internal electrode layer; wherein the first external electrode and the second external electrode are arranged horizontally, characterized in that, The first inner electrode layer and the second inner electrode layer have the same structure. Both the first inner electrode layer and the second inner electrode layer include a horizontal part and a vertical part arranged in a T-shape. The horizontal part of the first inner electrode layer is connected to the first outer electrode, and the front and rear ends of the horizontal part of the first inner electrode layer are respectively flush with the front and rear ends of the ceramic material layer. The horizontal part of the second inner electrode layer is connected to the second outer electrode, and the front and rear ends of the horizontal part of the second inner electrode layer are respectively flush with the front and rear ends of the ceramic material layer.

2. The MLCC capacitor according to claim 1, characterized in that, The vertical part has a vertical edge.

3. The MLCC capacitor according to claim 1, characterized in that, The vertical portion is composed of multiple vertical sides, which are arranged in parallel at intervals.

4. The MLCC capacitor according to claim 3, characterized in that, There are two vertical sides.

5. The MLCC capacitor according to claim 3, characterized in that, There are three vertical sides.

Images