CN202650842U

CN202650842U - Stacked capacitor with graphene conductive layer

Info

Publication number: CN202650842U
Application number: CN 201220120065
Authority: CN
Inventors: 林华森; 袁德喜; 汪阳
Original assignee: CHENGDU HUASEN ELECTRONIC INFORMATION INDUSTRY Co Ltd
Current assignee: CHENGDU HUASEN ELECTRONIC INFORMATION INDUSTRY Co Ltd
Priority date: 2012-03-27
Filing date: 2012-03-27
Publication date: 2013-01-02
Anticipated expiration: 2022-03-27

Abstract

The utility model discloses a stacked capacitor with a graphene conductive layer. A graphene conductive layer which is formed by graphene is between an inner pole layer and a dielectric layer of the stacked capacitor. The graphene conductive layer completely covers the inner pole layer, and preferably, the thickness of the graphene conductive layer is 10% to 100% of that of the inner pole layer. According to the stacked capacitor with the graphene conductive layer, with the graphene conductive layer between the inner pole layer and the dielectric layer, the coverage area of an antipole plate in the stacked capacitor is improved, and the capacitance of the stacked capacitor is improved.

Description

Multilayer capacitor with graphene conductive layer

Technical field

The utility model relates to cascade capacitor, relates in particular to a kind of cascade capacitor with graphene conductive layer.

Background technology

Multilayer ceramic capacitor (MLCC) is by the multilayer inner electrode layer and dielectric layer alternately superposes and sintering forms, and is a kind of cascade capacitor.As shown in Figure 1, the material of the dielectric layer of this cascade capacitor is pottery, the inner electrode layer of the metal material that the two sides of dielectric layer has, and respectively as positive plate and negative plate, a plurality of positive plates and negative plate go between to external electrode respectively by its polarity.Multilayer ceramic capacitor has little, the withstand voltage high advantage of volume, and numerous in variety, complete in specifications, low price, has therefore obtained the utmost point and has used widely, and might replace aluminium electrolytic capacitor and tantalum electrolytic capacitor.But the capacitance of multilayer ceramic capacitor is generally all less, and this has limited its scope of application.

Capacitance formula according to plate condenser: C=ε S/d, wherein, C is the capacitance of plate condenser, ε is dielectric dielectric constant between the plate condenser two-plate, S is the area coverage of two relative pole plates of plate condenser, d is the spacing of plate condenser two relative pole plates, will improve as can be known the capacitance of plate condenser, can be by improving its ε, S and/or d parameter.Because cascade capacitor is a kind of special shape (parallel connections of a plurality of plate condensers) of plate condenser, therefore can by improve dielectric DIELECTRIC CONSTANT ε between the relative pole plate in it, relatively pole plate area coverage S and/or relatively the spacing d of pole plate improve its capacitance.

Graphene (Graphene) is a kind ofly to form the flat film that hexangle type is the honeycomb lattice by carbon atom, only has the two-dimensional material of a carbon atom thickness.Because it has very high conductance and very large specific area, Graphene has broad application prospects at the Design ﹠ preparation of electronic device.

Therefore, those skilled in the art is devoted to develop a kind of cascade capacitor with graphene conductive layer, utilize the graphene conductive layer that large specific area is provided, with the area coverage of the relative pole plate in the raising cascade capacitor, thus the capacitance of raising cascade capacitor.

The utility model content

Because the defects of prior art, technical problem to be solved in the utility model provides a kind of cascade capacitor with graphene conductive layer, with the area coverage of the relative pole plate in the raising cascade capacitor, and then the capacitance of raising cascade capacitor.

For achieving the above object, the utility model provides a kind of multilayer capacitor with graphene conductive layer, comprise multilayer alternately inner electrode layer and the dielectric layer of stack, it is characterized in that between each described inner electrode layer and described dielectric layer, having one deck graphene conductive layer.

Further, described graphene conductive layer is formed by Graphene.

Further, described graphene conductive layer covers described inner electrode layer fully.

Further, the thickness of described graphene conductive layer be described inner electrode layer thickness 10% to 100%.

In preferred embodiments of the present utility model, the multilayer capacitor with graphene conductive layer is a kind of multilayer ceramic capacitor, has the graphene conductive layer that grapheme material forms between the dielectric layer of the inner electrode layer of its argent and ceramic material.The inner electrode layer of the complete covering metal silver of this graphene conductive layer.The thickness of this graphene conductive layer be argent inner electrode layer thickness 10% to 100%.

As seen, multilayer capacitor with graphene conductive layer of the present utility model passes through to increase one deck graphene conductive layer between the inner electrode layer of multilayer capacitor and dielectric layer, improve the area coverage of the relative pole plate in the cascade capacitor, thereby improved the capacitance of cascade capacitor; And the good mechanical performance of grapheme material can also improve the durability of cascade capacitor.In addition, because the graphene conductive layer is clipped between inner electrode layer and the dielectric layer, this structure can prevent the Cluster Phenomenon of the grapheme material of graphene conductive layer in the manufacture process of multilayer capacitor effectively, and can save grapheme material.

Be described further below with reference to the technique effect of accompanying drawing to design of the present utility model, concrete structure and generation, to understand fully the purpose of this utility model, feature and effect.

Description of drawings

Fig. 1 is the structural representation of the multilayer capacitor of prior art, comprising the dielectric layer (dielectric layer 2 as shown in FIG.) between 10 layers of inner electrode layer (inner electrode layer 1 as shown in FIG.), 9 layers of inner electrode layer and two

external electrodes

3 and 4.

Fig. 2 is the structural representation of the multilayer capacitor with graphene conductive layer of a preferred embodiment of the present utility model.

Embodiment

As shown in Figure 2, in a preferred embodiment, the multilayer capacitor with graphene conductive layer of the present utility model has 4 layers of inner electrode layer, 3 layers of dielectric layer and two external electrodes, and inner electrode layer and dielectric layer be stack alternately.Have the graphene conductive layer between inner electrode layer and the dielectric layer, the graphene conductive layer is formed by Graphene.Each inner electrode layer as positive plate and negative plate, is connected to external electrode respectively.For example, be dielectric layer 41 between inner electrode layer 10 and the inner electrode layer 20, be dielectric layer 42 between inner electrode layer 20 and the inner electrode layer 30, inner electrode layer 10 and inner electrode layer 30 are connected to external electrode 51, and inner electrode layer 20 is connected to external electrode 52.Wherein, external electrode 51 is positive electrodes, and external electrode 52 is negative electrodes; Perhaps, external electrode 51 is negative electrodes, and external electrode 52 is positive electrodes.Between inner electrode layer 10 and dielectric layer 41, it is graphene conductive layer 11, between dielectric layer 41 and inner electrode layer 20, it is graphene conductive layer 21, being graphene conductive layer 22 between inner electrode layer 20 and dielectric layer 42, is graphene conductive layer 32 between dielectric layer 42 and inner electrode layer 30.

In the present embodiment, the graphene

conductive layer

11,21 among Fig. 2,22 and 32 covers

inner electrode layer

10,20,20 and 30 respectively fully.But in of the present utility model other used, these graphene conductive layers also can be configured to cover the dielectric layer that is adjacent fully, as long as carry out being connected or insulating just passable between these graphene conductive layers and two external electrodes.For example graphene conductive layer 11 can be configured to complete blanket dielectric layer 41 and the insulation of assurance and external electrode 51, graphene conductive layer 21 can be configured to complete blanket dielectric layer 41 and the insulation of assurance and external electrode 52, graphene conductive layer 22 can be configured to complete blanket dielectric layer 42 and guarantee and the insulation of external electrode 52, and graphene conductive layer 32 can be configured to complete blanket dielectric layer 42 and the insulation of assurance and external electrode 51.

In the present embodiment, graphene

conductive layer

11,21 with multilayer capacitor of graphene conductive layer of the present utility model, 22 and 32 thickness can be set according to the needs of practical application, preferably, graphene

conductive layer

11,21,22 and 32 thickness can be set as 10% to 100% of

inner electrode layer

10,20 and 30 thickness.

For showing among Fig. 2 but the situation of other inner electrode layer, dielectric layer and the graphene conductive layer of not specified (NS) is similar to the situation of above-mentioned explanation, be not repeated herein.For the multilayer capacitor with graphene conductive layer of the present utility model with more multi-layered inner electrode layer and dielectric layer, the situation of its inner electrode layer, dielectric layer, external electrode and graphene conductive layer with describe similarly herein, be not repeated herein.

More than describe preferred embodiment of the present utility model in detail.Should be appreciated that those of ordinary skill in the art need not creative work and just can make many modifications and variations according to design of the present utility model.Therefore, all those skilled in the art comply with design of the present utility model on the basis of existing technology by the available technical scheme of logical analysis, reasoning, or a limited experiment, all should be in the determined protection range by claims.

Claims

1. the multilayer capacitor with graphene conductive layer comprises multilayer alternately inner electrode layer and the dielectric layer of stack, it is characterized in that having one deck graphene conductive layer between each described inner electrode layer and described dielectric layer.

2. the multilayer capacitor with graphene conductive layer as claimed in claim 1, wherein said graphene conductive layer is formed by Graphene.

3. the multilayer capacitor with graphene conductive layer as claimed in claim 2, wherein said graphene conductive layer covers described inner electrode layer fully.

4. the multilayer capacitor with graphene conductive layer as claimed in claim 3, the thickness of wherein said graphene conductive layer be described inner electrode layer thickness 10% to 100%.