CN207038354U - The structure-improved of monolithic ceramic capacitor - Google Patents

Abstract

The utility model is to provide a kind of structure-improved of monolithic ceramic capacitor,It is the how ceramic electric inducing layer for having upper and lower lamination in dielectric medium body,And the interior electrode of lamination interlaced with each other is provided with each two adjacent ceramic electric inducing layer inner surface,And external terminal electrode is provided with the end of dielectric medium body two,And interior electrode includes the core for being electrically connected at the end of external terminal electrode and being extended by end,The width of its end is shorter than core and termination electrode direction extends into a contraction section towards the outside,The end of such a interior electrode is to form the chamfering with radius of curvature with each corner of core or corner pair part position,It can avoid accumulating microstructural damage caused by high-energy or stress concentration,Lift the effect of product proof voltage,And the length extended in contraction section makes the safe distance of core and external terminal electrode maintenance preset space length,The follow-up probability for making electroplate liquid during external terminal electrode and penetrating into can be reduced,Ensure overall high capacity performance,And then lift product qualification rate and reliability.

Description

The structure-improved of monolithic ceramic capacitor

Technical field

The utility model is to provide a kind of structure-improved of monolithic ceramic capacitor, can espespecially improve dielectric medium body interior The physical form of the interior electrode of cross laminates, to avoid microstructural damage caused by high-energy or stress concentration, and after reduction It is continuous make external terminal electrode during electroplate liquid penetrate into the probability for influenceing total capacitance value performance, and then lifted product qualification rate with can By degree.

Background technology

The making of electronic component is gradually required that multitask develops, to meet high-order electronic component complicated news each other Number transmit and running, and capacitor is strided forward towards trend such as miniaturization, high-capacitance, high stability and reliabilitys, and it is traditional Capacitor is changed into the monolithic ceramic capacitor with chip form, because production equipment progresses greatly and the drive to the basket of technology, Monolithic ceramic capacitor is not only significantly reduced its volume and also reduce production cost, be generally also subject to high-capacitance and high letter Lai Du product requirement.

Monolithic ceramic capacitor store electric charge function, be derived mainly from multiple laminations each other ceramics lure electrics layer and Inner electrode layer, and lure the external electrode at the end of electrics layer two to make electrically to continue by inner electrode layer and ceramics, its layer structure is to store up Deposit the special container of electricity, the electricity storage principle of this container, substantially using at least two mutual stacked parallels but in Between accompany the sheet metal of a ceramic insulation thing, the effect of ceramic insulation thing is barrier metal piece, make each two adjacent metal piece that It can never be in contact between this, as any in two sheet metals and anode end in contact, another will simultaneously Electron stream is attracted to accumulate and be used as GND end, now this sheet metal starts to store electric charge, begins to be referred to as electric capacity.

By electric capacity storage electric charge ability and sheet metal and ceramic insulation thing institute's energy lamination each other the number of plies into just Than this layer structure forms the basic model of monolithic ceramic capacitor, and when the lamination number of plies is continuously increased, capacitance is just natural Meeting is along with lifting, and further, in order that the number of plies of lamination can be significantly increased, the multitask of monolithic ceramic capacitor is sent out Then start to reduce sheet metal and ceramic insulation thing thickness in exhibition, purpose is nothing more than making monolithic ceramic capacitor in limited volume It can accomplish that the lamination of maximum quantity is set, the lamination of this layer structure sets the electric capacity as being parallel with maximum quantity, made Monolithic ceramic capacitor total capacitance is equal to the summation (Ct=C1+C2+C3+...+Ci) of each layer capacitance amount.

Refer to as shown in figure 9, being the stereo appearance figure of conventional monolithic ceramic capacitor, wherein this dielectric medium body A bag More ceramic substrate A1 of mutual lamination are included, and electrode B in a T-shaped, and two adjacent ceramic bases are provided with each ceramic substrate A1 top surfaces Electrode B is set with direction staggeredly in T-shaped on plate A1, and electrode B is by a short wide one long narrow portion B2 of portion B1 connections in T-shaped Composition, its short wide side of portion B1 mono- are generally flush with its a corresponding ceramic substrate A1 side, and in long narrow portion B2 free end It is respectively equipped with and with side T-shaped close to this ceramic substrate A1 relatively another side, then in more ceramic substrate A1 relative dual side-edge The two external electrode C that the short wide portion B1 of interior electrode B is electrically connected with.In other words, such a e often uses the short wide portion B1 of monolithic ceramic capacitor Contact area between external electrode C is larger, will not trigger interior electrode tip that implosion nearby occurs through structural strength increase.

However, after it the more do the more thin as the metal blade technolgy of interior electrode, even if how electrode shape in ingenious change, Its material bears transient voltage or the ability of anti-stress destructiveness in itself can all decline therewith, if the shape according to interior electrode is observed, Then corner or corner pair part position are due to wedge angle, being easiest to because in sharp corner microcosmic break occurs for accumulation high-energy or stress concentration Split, generally to the follow-up external electrode process that makes electroplate liquid infiltration occurs for this phenomenon by highlighting again, or is using process Generation point discharge effect then impacting electric capacity device dielectricity, and causing under insulation impedance caused by the deterioration of production reliability Drop, the performance for influenceing total capacitance value etc..Furthermore the interface of interior electrode tip and external electrode between the two is due to being that stress intersects Place, easily formed and extend into the micro cracking of interior electrode, make electroplate liquid penetrated into along interface in electrode core, so will be how High-energy or stress concentration occur after slimming for electrode in effectively suppressing, and can prevent the improper infiltration of electroplate liquid, just like Redesign and the problem persistently solved are desired most ardently as this journey dealer is engaged in.

Utility model content

In view of the problem of above-mentioned existing and missing, collect related data via multi-party assessment and consideration, and utilize and be engaged in Constantly study and change in the experience of research and development for many years of the industry, just there is the new birth of structure-improved of such a monolithic ceramic capacitor It is raw.

Main purpose of the present utility model is that this dielectric medium body has the how ceramic electric inducing layer of upper and lower lamination, and every The interior electrode of lamination interlaced with each other is designed with two adjacent ceramic electric inducing layer inner surfaces, and is provided with the end of dielectric medium body two External terminal electrode, can be by the end of electrode in improvement and each corner of core or corner pair part position formed with chamfer design, with Avoid accumulating microstructural damage caused by high-energy or stress concentration, and still have in the state of slimming and bear moment The ability of voltage or anti-stress destructiveness, lift the effect of product proof voltage；Because the end portion width of interior electrode is shorter than core and court External terminal electrode direction extends into the opposed, inwardly directed contraction section to narrow of width, can make to remain pre- between core and external terminal electrode The safe distance of determining deviation, with intensified ceramic electric inducing layer completely cut off it is follow-up make electroplate liquid during external terminal electrode penetrate into it is several Rate, it is ensured that the performance of overall high capacity, and then lift product qualification rate and reliability.

Secondary objective of the present utility model is the chamfering physical form for improveing end and each corner of core or corner pair part position (such as arc fillet or sector), the ability of transient voltage or anti-stress destructiveness is can bear with electrode in increase, and can avoided When monolithic ceramic capacitor is pursues lamination number of plies increase, there is wedge angle or side using easy accumulation high-energy or stress concentration Electrode in the slimming of shape pattern, and then lift the effect of product proof voltage.

Another object of the present utility model is that this interior electrode is penetrating into the anti-of influence total capacitance value performance for electroplate liquid Fan Shang, the end of electrode and the length of side width of external terminal electrode cooperating contact especially in shortening, wherein, the end of the interior electrode is wide The most short length of side of degree can be the dimensions length of core width about 90%~25%, and all termination electrode direction is straight towards the outside by end Line extends into contraction section, makes reduced cross-sectional area, ceramic electric inducing layer and the outer end contacted between interior electrode and external terminal electrode The sectional area increase contacted between electrode, pipeline (the breaking such as on micro-scale that electroplate liquid finds intrusion along end can be reduced Damage or structure are destroyed), to avoid causing insulation impedance caused by the deterioration of production reliability from declining, influence the performance of total capacitance value Deng；In addition, in order to avoid excessive bulk contraction occurs for material in ceramic electric inducing layer sintering process or structure produces breakage, can pass through The end of interior electrode especially extends into contraction section, make between core and external terminal electrode maintain have preset space length safety away from From with the probability of intensified ceramic electric inducing layer isolation electroplate liquid infiltration core.

Brief description of the drawings

Fig. 1 is stereo appearance figure of the present utility model.

Fig. 2 is three-dimensional exploded view of the present utility model.

Fig. 3 is side cutaway view of the present utility model.

Fig. 4 is the top view of electrode in the utility model.

Fig. 5 is the stereo appearance figure of another preferred embodiment of the utility model.

Fig. 6 is the three-dimensional exploded view of another preferred embodiment of the utility model.

Fig. 7 is the top view of electrode in the utility model further embodiment.

Fig. 8 is the top view of electrode in the utility model another preferred embodiment.

Fig. 9 is the stereo appearance figure of existing monolithic ceramic capacitor.

【Symbol description】

1st, dielectric medium body

11st, ceramic electric inducing layer

2nd, interior electrode

20th, inner electrode layer

201st, electrode in first

202nd, the second inner electrode

203rd, floating electrode

21st, end

211st, connection end

212nd, contraction section

2121st, curved arc side

2122nd, straight line

2123rd, side is tiltedly stretched

22nd, core

23rd, chamfering

3rd, external terminal electrode

W1, width

W2, width

G, preset space length

R1, radius of curvature

R2, radius of curvature

R3, radius of curvature

A, dielectric medium body

A1, ceramic substrate

B, electrode in T-shaped

B1, short wide portion

B2, long narrow portion

C, external electrode

Embodiment

To reach above-mentioned purpose and effect, technological means and its construction used by the utility model, now draw with regard to this reality With new preferred embodiment elaborate, its construction is as follows with function, in favor of understanding completely.

As shown in Figures 1 to 4, stereo appearance figure respectively of the present utility model, three-dimensional exploded view, side cutaway view and interior The top view of electrode, it can be clearly seen from the figure that, the structure-improved of monolithic ceramic capacitor of the present utility model is to include Jie Electric matter body 1, more interior external terminal electrodes 3 of electrode 2 and two, more ceramics that wherein this dielectric medium body 1 has upper and lower lamination lure electricity Layer 11, and the interior electrode 2 of lamination interlaced with each other is designed with the opposed inside surface of each two adjacent ceramic electric inducing layer 11, and be situated between Relative external terminal electrode 3 is provided with the electric end of matter body 1 two, and interior electrode 2 is electrically connected at ceramic electric inducing layer 11 to include The end 21 of one end external terminal electrode 3 and the core 22 for extending the close ceramic other end of electric inducing layer 11 by end 21, its end Portion 21 is that have the connection end 211 for flushing in the ceramic short side of electric inducing layer 11, and the width W1 of this end 21 is to be shorter than core 22 Width W2 and towards the outside the direction linear extension of termination electrode 3 turn into the opposed, inwardly directed contraction section 212 to narrow of width, then in contraction section 212 along the length that the ceramic long side direction of electric inducing layer 11 is extended formed with a preset space length G, to separate core 22 and outer end Electrode 3 will not be contacted with each other, and the corner intersected with 22 each length of side of core of this end 21 or corner pair part position are formed with song respectively Rate radius R1, R2 chamfering 23.

In the present embodiment, the most short length of side of connection end 211 of the width of end 21 of interior electrode 2 is the 1/2 of the width of core 22 (or 50%), but in practical application, also can be the width of core 22 9/10,7/10,4/5,3/5,2/5,1/2,1/3 or 1/4, I.e. the width of end 21 is the dimensions length that the width of core 22 is about 90%~25% length of side ratio, and in the two-phase of contraction section 212 Be respectively formed with curved arc side 2121 at the chamfering 23 of opposite side, and the curved arc side 2121 of contraction section 212 be in an arc fillet or Sector, then the direction of termination electrode 3 is respectively formed with the straight line 2122 extended on the end of connection end 211 2 (such as Fig. 2 institutes towards the outside Show), end 21 and core can be made by physical form of the electrode in improvement 2 in the corner that each length of side intersects or corner pair part position 22 each corners or corner pair part position are respectively formed with chamfering 23 and designed, and transient voltage or resistance to stress are can bear with electrode in increase by 2 The ability of destruction etc..

The structure design of chamfering 23 of above-mentioned interior electrode 2 can reduce high-energy or stress concentration in each corner or corner pair part position, And when avoiding monolithic ceramic capacitor to pursue lamination number of plies increase, using having for easy accumulation high-energy or stress concentration Electrode in the slimming of wedge angle or square pattern, therefore, the utility model still has in the state of the slimming of interior electrode 2 to be born The ability of transient voltage or anti-stress destructiveness, and then lift the effect of product proof voltage.

Furthermore the electrode in penetrating into the strick precaution of influence total capacitance value performance for electroplate liquid, especially shortening of electrode 2 in more 2 end 21 and the length of side width of connection end 211 of the cooperating contact of external terminal electrode 3, and by all sides of termination electrode 3 towards the outside of end 21 To the opposed, inwardly directed contraction section 212 to narrow of width is extended into, make the sectional area contacted between interior electrode 2 and external terminal electrode 3 It is reduced, and the sectional area contacted between ceramic electric inducing layer 11 and external terminal electrode 3 is increased, such a design can reduce electroplate liquid The pipeline of intrusion is found along end 21, as the breakage on micro-scale or defect, and structure caused by stress concentration are destroyed Deng making end 21 of the electroplate liquid along interior electrode 2 penetrate into the probability of core 22 and be greatly reduced, to avoid causing production reliability Deterioration caused by insulation impedance decline, influence the performance etc. of total capacitance value；In order to avoid ceramic electric inducing layer 11 is in the mistake of sintering Cheng Zhong, excessive bulk contraction occurs for its material or structure produces breakage, defect etc., and the end 21 that can pass through interior electrode 2 is especially prolonged It is stretched into as a contraction section 212, makes to maintain the safe distance for having preset space length G between core 22 and external terminal electrode 3, to strengthen pottery Porcelain electric inducing layer 11 completely cuts off electroplate liquid and penetrated into the probability of core 22, it is ensured that the performance of overall high capacity, and then lift product and close Lattice rate and reliability.

Please arrange in pairs or groups refering to shown in Fig. 5, Fig. 6, be respectively the stereo appearance figure of another preferred embodiment of the utility model and Three-dimensional exploded view, it can be clearly seen from the figure that, the ceramic electric inducing layer 11 and inner electrode layer 20 of lamination interlaced with each other, and inner electrode layer 20 include electrode 201 and the second inner electrode 202 (as shown in Figure 6) in the first of external terminal electrode 3 are electrically connected, and The external terminal electrode 3 at the end of dielectric medium body 1 two is electrically connected, and does not connect electrically with any external terminal electrode 3 completely The floating electrode 203 (as shown in Figure 6) connect, wherein, what electrode 201 and the second inner electrode 202 were paired in first is arranged on ceramics A spacing has been separated by the same plane of electric inducing layer 11, and has been electrically connected at outside through the connection end 211 of end 21 respectively Termination electrode 3, and each floating electrode 203 is arranged in the Different Plane of another adjacent ceramic electric inducing layer 11, can make floating electrode 203 With first in electrode 201,202 lamination interlaced with each other of the second inner electrode, and floating electrode 203 in first electrode 201 with Area is overlapping between the second inner electrode 202.

In the present embodiment, it is that there is width phase respectively at the side of center line two of this floating electrode 203 alongst To the contraction section 212 inwardly to narrow, and curved arc side 2121 is respectively formed with the chamfering 23 of the relative side of contraction section 212 2, Again the online straight line 2122 in the center of extending to is respectively formed with towards centerline direction.In addition, from the center of floating electrode 203 The direction of two external terminal electrode of line 3 is respectively formed with electrode 201 and the second inner electrode 202 in first, and electrode 201 and the in first In two electrode 202 have the end 21 that links together each other and by end 21 extend using center line be baseline simultaneously that The core 22 of this mirror symmetry, and the end 21 of electrode 201 and the second inner electrode 202 is that have to flush in pottery respectively in each first The connection end 211 of the short side of porcelain electric inducing layer 11.

Electrode 201 and the second inner electrode 202 in the first of the present embodiment, due to being the design for being useful in floating electrode 203 Mechanism, therefore capacitor internal electrode layers staggered case is more special, but the physics shape of end 21 and 22 each corner of core and corner pair part position Shape is respectively formed with chamfering 23 and designed, and end 21 width W1 be shorter than core 22 width W2 and formed with one it is predetermined between Feature away from G still falls within the utility model category, and skill feature of the present utility model is not limited thereto, all people in the art Member can think easily and change or modification etc., all should similarly covered in the claim of following this case.

Further, refer to shown in Fig. 7, be for the top view of electrode in the utility model another preferred embodiment, by It can be seen that, the end 21 of interior electrode 2, which is located at the chamfering 23 of the relative side of contraction section 212 2, in the present embodiment is in figure The first curved arc side 2121 with radius of curvature R 1 is formed respectively, and is formed by the first curved arc side 2121 all reflexeds with curvature half Footpath R3 the second curved arc side 2121, then the direction of termination electrode 3 is respectively formed with the straight line extended on the end of connection end 211 2 towards the outside Side 2122, and the first curved arc of contraction section 212 while 2121 with the second curved arc while 2121 radius of curvature can be identical or differ.

Refer to shown in Fig. 8, be for the top view of electrode in the utility model another preferred embodiment, by can be clear in figure Find out, the end 21 of interior electrode 2 is located at the chamfering 23 of the relative side of contraction section 212 2 to form tool respectively in the present embodiment Have a curved arc side 2121 of radius of curvature R 1, and by curved arc while 2121 all towards the outside the direction of termination electrode 3 it is tapered formed with tiltedly stretching while 2123, then a straight line 2122 extended on the end of connection end 211 2 of transferring out respectively, the contraction section 212 of such a end 21 is also Can be according to the application adjustment of reality secondly the combination of all shapes of relative side changes, and makes between interior electrode 2 and external terminal electrode 3 The sectional area of contact is reduced, and can reduce follow-up connection end of the electroplate liquid along end 21 during making external terminal electrode 3 The pipeline of 211 intrusions, and produce a safety because ceramic electric inducing layer 11 is increased with the sectional area contacted between external terminal electrode 3 Distance, the probability that electroplate liquid penetrates into core 22 is completely cut off with intensified ceramic electric inducing layer 11, can ensure that whereby the qualification rate of product with can By degree.

Therefore, the utility model is mainly in the ceramic electric inducing layer 11 of the adjacent upper and lower lamination of each two of dielectric medium body 1 Side surface is provided with the interior electrode 2 of lamination interlaced with each other, and the outside of the end 21 and the ceramic end of electric inducing layer 11 2 by interior electrode 2 Termination electrode 3 electrically continues, and can be formed and had in each corner or corner pair part position with core 22 by the end 21 of electrode in improvement 2 The chamfering 23 for having radius of curvature designs, and to avoid accumulating microstructural damage caused by high-energy or stress concentration, lifts product The effect of proof voltage；Core 22 is shorter than due to the width of end 21 of interior electrode 2 and the direction linear extension of termination electrode 3 turns into towards the outside One contraction section 212, the safe distance that preset space length G is maintained between core 22 and external terminal electrode 3 can be made, to reduce follow-up make The probability that electroplate liquid penetrates into along end 21 during external terminal electrode 3, it is ensured that the performance of overall high capacity, and then lifted Product qualification rate and reliability.

Above-mentioned detailed description is to illustrate for a kind of preferable possible embodiments of the utility model, and only this embodiment is simultaneously Be not used to limit claim of the present utility model, it is all other without departing from institute under the skill spirit disclosed in the utility model The equivalent changes and modifications change of completion, should be included in the scope of the claims that the utility model is covered.

In summary, the structure-improved of the above-mentioned monolithic ceramic capacitor of the utility model using when can reach its work(really Effect and purpose, therefore the utility model is really the excellent creation of a practicality, meets the application condition of new patent, proposes Shen in accordance with the law Please, expect that examine committee gives this case mandate early, to ensure the arduous creation of new creator.

Claims (15)

1. a kind of structure-improved of monolithic ceramic capacitor, it is to include dielectric medium body, more interior electrodes and two external terminal electrodes, this Dielectric medium body has the how ceramic electric inducing layer of upper and lower lamination, and on each two adjacent ceramic electric inducing layer opposed inside surface all Interior electrode provided with lamination interlaced with each other, and relative external terminal electrode is provided with the end of dielectric medium body two, it is characterised in that：

This interior electrode includes the end being electrically connected on the external terminal electrode of ceramic electric inducing layer one end, and is extended by end and leaned on The core of the nearly ceramic electric inducing layer other end, and there is the connection end contacted with external terminal electrode in end, and the width of end is short In core, and termination electrode direction extends into the opposed, inwardly directed contraction section to narrow of width towards the outside, and contraction section extends to company The length for connecing end forms a preset space length, to separate the core and external terminal electrode, then in end and each length of side cross-shaped portion of core Position forms the chamfering with radius of curvature respectively.

2. the structure-improved of monolithic ceramic capacitor according to claim 1, it is characterised in that this interior electrode is located at end Connection end to flush in ceramic electric inducing layer short side.

3. the structure-improved of monolithic ceramic capacitor according to claim 1, it is characterised in that this interior electrode is located at end The connection end length of side be core width 1/2.

4. the structure-improved of monolithic ceramic capacitor according to claim 1, it is characterised in that this interior electrode is located at end The connection end length of side be core width 1/3.

5. the structure-improved of monolithic ceramic capacitor according to claim 1, it is characterised in that this interior electrode is located at end The connection end length of side be core width 1/4.

6. the structure-improved of monolithic ceramic capacitor according to claim 1, it is characterised in that this interior electrode is located at end The connection end length of side be core width 2/5.

7. the structure-improved of monolithic ceramic capacitor according to claim 1, it is characterised in that this interior electrode is located at end The connection end length of side be core width 3/5.

8. the structure-improved of monolithic ceramic capacitor according to claim 1, it is characterised in that this interior electrode is located at end The connection end length of side be core width 4/5.

9. the structure-improved of monolithic ceramic capacitor according to claim 1, it is characterised in that this interior electrode is located at end The connection end length of side be core width 7/10.

10. the structure-improved of monolithic ceramic capacitor according to claim 1, it is characterised in that this interior electrode is positioned at end The connection end length of side in portion is the 9/10 of core width.

11. the structure-improved of monolithic ceramic capacitor according to claim 1, it is characterised in that end of electricity is wide in this Degree is 90%~25% length of side ratio of core width.

12. the structure-improved of monolithic ceramic capacitor according to claim 1, it is characterised in that the end of this interior electrode It is to be respectively formed with the curved arc side extended on the end of connection end two at the chamfering of the relative side of contraction section two, and curved arc side is Curved fillet or sector.

13. the structure-improved of monolithic ceramic capacitor according to claim 1, it is characterised in that this interior electrode is positioned at end The relative side of contraction section two in portion is to be respectively formed with the curved arc side extended on the end of connection end two.

14. the structure-improved of monolithic ceramic capacitor according to claim 1, it is characterised in that the end of this interior electrode Positioned at the relative side of contraction section two to form a curved arc side respectively, then termination electrode direction is respectively formed with and extends to connection towards the outside Hold the straight line on two ends.

15. the structure-improved of monolithic ceramic capacitor according to claim 1, it is characterised in that the end of this interior electrode Positioned at the relative side of contraction section two to form one first curved arc side respectively, and by the first curved arc when reflexed forms the second curved arc, Termination electrode direction is respectively formed with the straight line extended on the end of connection end two towards the outside again, and the first curved arc side of contraction section with Second curved arc side radius of curvature is identical or differs.