CN205920877U - Chip multilayer ceramic capacitor - Google Patents
Chip multilayer ceramic capacitor Download PDFInfo
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- CN205920877U CN205920877U CN201620591393.2U CN201620591393U CN205920877U CN 205920877 U CN205920877 U CN 205920877U CN 201620591393 U CN201620591393 U CN 201620591393U CN 205920877 U CN205920877 U CN 205920877U
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- ceramic
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- sheet form
- ceramic condenser
- high strength
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- 239000003985 ceramic capacitor Substances 0.000 title abstract description 3
- 239000000919 ceramic Substances 0.000 claims abstract description 83
- 238000005452 bending Methods 0.000 claims abstract description 19
- PXHVJJICTQNCMI-UHFFFAOYSA-N Nickel Chemical compound [Ni] PXHVJJICTQNCMI-UHFFFAOYSA-N 0.000 claims description 8
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 claims description 4
- BQCADISMDOOEFD-UHFFFAOYSA-N Silver Chemical compound [Ag] BQCADISMDOOEFD-UHFFFAOYSA-N 0.000 claims description 4
- ATJFFYVFTNAWJD-UHFFFAOYSA-N Tin Chemical compound [Sn] ATJFFYVFTNAWJD-UHFFFAOYSA-N 0.000 claims description 4
- 229910052802 copper Inorganic materials 0.000 claims description 4
- 239000010949 copper Substances 0.000 claims description 4
- 229910052759 nickel Inorganic materials 0.000 claims description 4
- 229910052709 silver Inorganic materials 0.000 claims description 4
- 239000004332 silver Substances 0.000 claims description 4
- 238000000034 method Methods 0.000 description 14
- 208000037656 Respiratory Sounds Diseases 0.000 description 10
- 238000004519 manufacturing process Methods 0.000 description 6
- 239000000463 material Substances 0.000 description 5
- 239000003990 capacitor Substances 0.000 description 4
- 229910052573 porcelain Inorganic materials 0.000 description 4
- 230000008569 process Effects 0.000 description 4
- 238000012360 testing method Methods 0.000 description 4
- 238000009792 diffusion process Methods 0.000 description 3
- 238000010030 laminating Methods 0.000 description 3
- 238000002360 preparation method Methods 0.000 description 3
- 239000000047 product Substances 0.000 description 3
- 238000004458 analytical method Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 229910052751 metal Inorganic materials 0.000 description 2
- 239000002184 metal Substances 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 206010007247 Carbuncle Diseases 0.000 description 1
- AMVVEDHCBDQBJL-UHFFFAOYSA-N [Ca][Zr] Chemical group [Ca][Zr] AMVVEDHCBDQBJL-UHFFFAOYSA-N 0.000 description 1
- 238000010521 absorption reaction Methods 0.000 description 1
- 230000008901 benefit Effects 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 238000007766 curtain coating Methods 0.000 description 1
- 238000005520 cutting process Methods 0.000 description 1
- 239000003989 dielectric material Substances 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000007246 mechanism Effects 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 238000007747 plating Methods 0.000 description 1
- 238000007789 sealing Methods 0.000 description 1
- 239000011265 semifinished product Substances 0.000 description 1
- 238000005245 sintering Methods 0.000 description 1
- 239000002002 slurry Substances 0.000 description 1
- 239000000758 substrate Substances 0.000 description 1
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- Ceramic Capacitors (AREA)
Abstract
The utility model provides a slice multilayer ceramic electric capacity has the anti bending strength who improves. The chip multilayer ceramic capacitor includes: a plurality of sheet-like inner electrodes stacked in a staggered manner; a ceramic dielectric layer disposed between and outside the plurality of sheet-like internal electrodes so that opposite end portions of the plurality of sheet-like internal electrodes are exposed; a terminal electrode covering the both end portions so as to be electrically connected to the plurality of sheet-like internal electrodes; and the high-strength ceramic medium is formed on the ceramic medium layer.
Description
Technical field
This utility model is related to technical field of electronic devices, more particularly, to a kind of sheet form multilaminate ceramic condenser.
Background technology
Sheet form multilaminate ceramic condenser (mlcc, multi-layer ceramic capacitors) has that capacity is big, volume
Little, capacitance is stable, high temperature resistant moisture-proof is good and is easy to surface the features such as install, and is widely used in the high frequency filter of air conditioner
In the circuit such as ripple, power supply decoupling and bypass.As shown in figure 1, described sheet form multilaminate ceramic condenser includes interior electrode 1, medium 2 (example
As pottery) and external electrode 3.Wherein, external electrode 3 further includes from inside to outside, the such as first to the 3rd external electrode 31-33.
The first external electrode 31 is, for example, layers of copper or silver layer, and the second external electrode 32 is, for example, tin layers, and the 3rd external electrode 33 for example, nickel
Layer.
But due to the mechanical stress in production process, the situation of sheet form multilaminate ceramic condenser inefficacy often occurs.Analyze it
Reason, mainly due to sheet form multilaminate ceramic condenser, stress leads to crackle inside it by bending, and this kind of crackle typically occurs
In the electrode at sheet form multilaminate ceramic condenser two ends, along 45° angle to sheet form multilaminate ceramic condenser internal extended.The institute of crackle occurs
State sheet form multilaminate ceramic condenser, not exclusively controlled in test process, thus leading to equipment fault.
Specifically, the ceramic body of described sheet form multilaminate ceramic condenser is a kind of fragile material.When being provided with, described lamellar is many
When the pcb plate of layer ceramic condenser is bent, described sheet form multilaminate ceramic condenser will be impacted by certain mechanical stress.When
When stress exceedes the intensity of sheet form multilaminate ceramic condenser, bending crack arises that.Therefore, the crackle that this bending causes only goes out
Now after being welded.According to the failure analysis of mlcc, when the bending deformation quantity of circuit board exceedes certain value, typically can be at it
Germinate oblique line crackle at termination electrode and Ceramic bond, and to mlcc diffusion inside, and so that mlcc was lost efficacy.Fig. 2 shows piece
Shape multi-layer ceramics patch capacitor is subject to the schematic diagram of fracture after mechanical force.As shown in Fig. 2 described patch capacitor is being arranged on circuit
After on plate, when the stress in the direction being subject to as shown in figure left arrow, and this stress exceedes the intensity of described patch capacitor
When, then produce the crackle as shown in figure lines from the tip electrodes of this patch capacitor with the position of Ceramic bond, and then crackle
Diffusion, and ultimately result in condenser failure.
For preventing described crackle from occurring, need to improve the flexural strength of sheet form multilaminate ceramic condenser.Conventional lamellar is many
Layer ceramic condenser adopts ceramic body medium, and quality is crisp.Thus, it is that the electrode of sheet form multilaminate ceramic condenser increases " elastic layer " absorption
External carbuncle, it is possible to decrease the occurrence probability of crackle, thus improve its dependability.However, this scheme is relatively costly.
Utility model content
In view of this, this utility model provides a kind of sheet form multilaminate ceramic condenser, has the flexural strength of raising.
This utility model provides a kind of sheet form multilaminate ceramic condenser, comprising: electrode in multiple lamellars, folds in an interleaved manner
Close；Ceramic dielectric layer, is arranged between electrode and outside in each the plurality of lamellar, and makes electrode in the plurality of lamellar
Relative both ends are exposed；Termination electrode, covers at described both ends such that it is able to conduct electrode in the plurality of lamellar；
And high strength china is situated between, it is formed on described ceramic dielectric layer.
Further, the resistant to bending stresses intensity that described high strength china is situated between is higher than described ceramic dielectric layer.
Further, the resistant to bending stresses intensity that described high strength china is situated between is more than 250mpa.
Further, described high strength china Jie's thickness is 0.5mm-2mm.
Further, described high strength china Jie's thickness is 1mm.
Further, described high strength china is situated between and is formed at the parallel with electrode surface in lamellar outer of described ceramic dielectric layer
On side surface.
Further, described termination electrode is formed as multiple structure.
Further, described multiple structure further includes from inside to outside, the layers of copper as the first external electrode or silver layer, makees
For the tin layers of the second external electrode, and the nickel dam as the 3rd external electrode.
According to scheme of the present utility model, carried by the porcelain dielectric material that the outer surface in ceramic dielectric increases high intensity
High integral product intensity, thus the flexural strength of sheet form multilaminate ceramic condenser can be improved, reduces what process mechanism stress led to
Secretly split.
Described above is only the general introduction of technical solutions of the utility model, in order to better understand skill of the present utility model
Art means, and being practiced according to the content of description, below with preferred embodiment of the present utility model and coordinate accompanying drawing detailed
Describe in detail bright as after.
Brief description
The accompanying drawing constituting a part of the present utility model is used for providing further understanding to of the present utility model, and this practicality is new
The schematic description and description of type is used for explaining this utility model, does not constitute to improper restriction of the present utility model.?
In accompanying drawing:
Fig. 1 shows the structural representation of the sheet form multilaminate ceramic condenser of prior art；
Fig. 2 shows that described sheet form multilaminate ceramic condenser the schematic diagram of crackle receiving stress；
Fig. 3 shows the signal obtaining the bending strength that described sheet form multilaminate ceramic condenser should possess using testing program
Figure；
Fig. 4 is the structural representation of the sheet form multilaminate ceramic condenser according to this utility model one preferred embodiment；
Fig. 5 is the structural representation of the sheet form multilaminate ceramic condenser according to another preferred embodiment of this utility model；
Fig. 6 is that the flow process of the manufacture method of the sheet form multilaminate ceramic condenser according to this utility model one preferred embodiment is illustrated
Figure；
Fig. 7 is that the flow process of the manufacture method of the sheet form multilaminate ceramic condenser according to this utility model one specific embodiment is illustrated
Figure；
Fig. 8 (a), (b) respectively illustrate the described sheet form multilaminate pottery according to scheme of the present utility model and prior art
The flexural strength correlation curve of electric capacity, and the described sheet form multilaminate pottery according to scheme of the present utility model and prior art
The temperature characterisitic correlation curve of electric capacity.
Specific embodiment
For making the purpose of this utility model, technical scheme and advantage clearer, concrete below in conjunction with this utility model
Embodiment and corresponding accompanying drawing are clearly and completely described to technical solutions of the utility model.Obviously, described embodiment
It is only a part of embodiment of this utility model, rather than whole embodiments.Based on the embodiment in this utility model, this area
The every other embodiment that those of ordinary skill is obtained under the premise of not making creative work, broadly falls into this utility model
The scope of protection.
As described above, according to the failure analysis to mlcc, when the bending deformation quantity of circuit board exceedes certain value, one
As can germinate oblique line crackle at its termination electrode and Ceramic bond, to mlcc diffusion inside, and so that mlcc was lost efficacy.
According to testing program as shown in Figure 3, obtain the bending strength that described mlcc should possess.As shown in figure 3, choosing examination
Testing substrate is al2o3Or pcb, with the power of 5n, the speed of 0.5mm/s applies so as to bending depth is that 1mm (typically adopt by civilian industry
With 1mm), application time is 10s ± 1s.After then testing outward appearance should no visible damage, the change of capacity should be in ± 10% model
In enclosing.
According to above test requirements document it is proposed that scheme of the present utility model.As shown in figure 4, it is preferred for this utility model one
The structural representation of the sheet form multilaminate ceramic condenser of embodiment.As shown in figure 4, described sheet form multilaminate ceramic condenser includes multiple
Electrode 4 in shape, ceramic dielectric layer 5, termination electrode 6 and be formed at high strength china on ceramic dielectric layer 5 and be situated between 7.The plurality of
In shape, electrode 4 overlaps in an interleaved manner, and between electrode in each the plurality of lamellar and outside arrange described ceramic dielectric layer
5, and the relative both ends of electrode 4 in the plurality of lamellar are exposed.Described termination electrode 6 covers at described both ends,
So as to conduct electrode 4 in the plurality of lamellar.
The resistant to bending stresses intensity of described high strength china Jie 7 is higher than ceramic dielectric layer, because it is attached on ceramic dielectric layer, profit
With its higher resistant to bending stresses intensity, therefore referred to as high-strength ceramic medium, that is, high strength china is situated between.Preferably, high strength china
The resistant to bending stresses intensity being situated between is more than 250mpa.The high strength china usual material composition of Jie is zirconium calcium titanate, intensity and cog electric capacity material
Matter is close.No matter which kind of concrete material high-strength ceramic medium adopts, as long as its resistant to bending stresses intensity is higher than used pottery
The resistant to bending stresses intensity of ceramic dielectric layer is it is possible to play the effect of the flexural strength improving sheet form multilaminate ceramic condenser, all
Fall into protection domain of the present utility model.The high strength china usual dielectric constant of Jie is relatively low, if whole ceramic dielectric is all using institute
State described high strength china and be situated between that then product cost is high and capacitance scope that cover is less to be formed, it is therefore preferred that described high intensity
Porcelain Jie 7 is formed on the outer surface parallel with electrode in lamellar 4 surface of described ceramic dielectric 5.As shown in figure 4, described height
Intensity porcelain Jie 7 is formed on the upper and lower surface in outside parallel with electrode in lamellar 4 surface of described ceramic dielectric 5.Described high-strength
The thickness of degree porcelain Jie 7 is preferably 0.5mm-2mm, preferably 1mm.
It is further preferred that described termination electrode 6 is formed as multiple structure.Specifically, described termination electrode 6 enters one from inside to outside
Step includes, the such as first to the 3rd external electrode 61-63.The first external electrode 61 is, for example, layers of copper or silver layer, the second external electrode 62
As for tin layers, and the 3rd external electrode 63 for example, nickel dam, as shown in Figure 5.
The manufacture method of described sheet form multilaminate ceramic condenser is below described.Fig. 6 shows according to side described in the utility model
The flow chart of method.As shown in fig. 6, methods described includes preparation process s1, laminating step s2 and termination procedure s3.First, make
In standby step s1, prepare the film of the described interior electrode 4, the diaphragm of ceramic dielectric layer 5 and described high strength china Jie 7 of multiple lamellars
Piece.Afterwards, in laminating step s2, the diaphragm of electrode 4 interior described in multiple lamellars and described ceramic dielectric 5 is folded in an interleaved manner
Close so that the both ends of electrode 4 are exposed in the plurality of lamellar.Further, in described ceramic dielectric 5 and electrode in lamellar
The diaphragm of described high strength china Jie 7 of upper and lower surface overlapping of the ceramic dielectric 5 in the parallel outside in 4 surfaces, passes through, for example once
High temperature sintering and form chip.Followed by, in termination procedure s3, seal up metal level so that in multiple lamellar at the two ends of chip
Electrode 4 conducts, thus forming described termination electrode 6.
Further, the flow chart that Fig. 7 shows the specific embodiment according to described manufacture method of the present utility model.
Specifically, described preparation process includes, for example, prepare described interior electricity by steps such as porcelain slurry preparation, curtain coating and silk screen double exposures
The diaphragm semi-finished product of pole 4, ceramic dielectric layer 5 and high strength china Jie 7.Afterwards, in laminating step, will be interior described in multiple lamellars
The diaphragm of electrode 4 and described ceramic dielectric 5 overlaps in an interleaved manner, and further, described ceramic dielectric 5 and lamellar
The diaphragm of described high strength china Jie 7 of upper and lower surface overlapping of the parallel ceramic dielectric 5 in outside in interior electrode 4 surface.And pass through
Cutting, dumping and high temperature burn till and form chip.It is further preferred that chamfering operation is carried out to the chip being formed.Connect down
Coming, in termination procedure, sealing up metal level so that electrode 4 can conduct in multiple lamellar at the two ends of chip, thus being formed
Described termination electrode 6.And preferably, form the described termination electrode with multiple structure including plating.
According to such scheme of the present utility model, it is effectively improved the counter-bending strong of described sheet form multilaminate ceramic condenser
Degree.Fig. 8 (a), (b) respectively illustrate the described sheet form multilaminate ceramic condenser according to scheme of the present utility model and prior art
Flexural strength correlation curve, and according to scheme of the present utility model and the described sheet form multilaminate ceramic condenser of prior art
Temperature characterisitic correlation curve.Can be seen that in the case of not reducing temperature characterisitic according to Fig. 8 (a), (b), of the present utility model
The flexural strength of described sheet form multilaminate ceramic condenser is obviously improved, and specifically, flexural strength improves more than 50%, thus,
The probability of product fracture reduces by more than 50%.
Above described sheet form multilaminate ceramic condenser of the present utility model and its manufacture method are described, by,
For example being situated between in the described high strength china of ceramic dielectric outer surface setting, increasing the strength of materials of ceramic body, using thus improving
The flexural strength of mlcc, improves its dependability.
The above, be only preferred embodiment of the present utility model, not this utility model is made any formal
Restriction, any simple modification, equivalent variations and modification above example made according to technical spirit of the present utility model,
All still fall within the range of technical solutions of the utility model.
Claims (8)
1. a kind of sheet form multilaminate ceramic condenser, comprising:
Electrode in multiple lamellars, overlaps in an interleaved manner；
Ceramic dielectric layer, is arranged between electrode and outside in each the plurality of lamellar, and makes electrode in the plurality of lamellar
Relative both ends expose；
Termination electrode, covers at described both ends such that it is able to conduct electrode in the plurality of lamellar；And
High strength china is situated between, and is formed on described ceramic dielectric layer.
2. sheet form multilaminate ceramic condenser as claimed in claim 1, wherein,
The resistant to bending stresses intensity that described high strength china is situated between is higher than described ceramic dielectric layer.
3. sheet form multilaminate ceramic condenser as claimed in claim 2, wherein,
The resistant to bending stresses intensity that described high strength china is situated between is more than 250mpa.
4. sheet form multilaminate ceramic condenser as claimed in claim 1, wherein,
Described high strength china Jie's thickness is 0.5mm-2mm.
5. sheet form multilaminate ceramic condenser as claimed in claim 4, wherein,
Described high strength china Jie's thickness is 1mm.
6. sheet form multilaminate ceramic condenser as claimed in claim 1, wherein,
Described high strength china is situated between and is formed on the outer surface parallel with electrode surface in lamellar of described ceramic dielectric layer.
7. the sheet form multilaminate ceramic condenser as described in any one of claim 1-6, wherein,
Described termination electrode is formed as multiple structure.
8. sheet form multilaminate ceramic condenser as claimed in claim 7, wherein,
Described multiple structure includes from inside to outside, the layers of copper as the first external electrode or silver layer, as the tin layers of the second external electrode,
And the nickel dam as the 3rd external electrode.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620591393.2U CN205920877U (en) | 2016-06-15 | 2016-06-15 | Chip multilayer ceramic capacitor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620591393.2U CN205920877U (en) | 2016-06-15 | 2016-06-15 | Chip multilayer ceramic capacitor |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN205920877U true CN205920877U (en) | 2017-02-01 |
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ID=57877633
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|---|---|---|---|
| CN201620591393.2U Active CN205920877U (en) | 2016-06-15 | 2016-06-15 | Chip multilayer ceramic capacitor |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN205920877U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106169370A (en) * | 2016-06-15 | 2016-11-30 | 格力电器（合肥）有限公司 | Chip multilayer ceramic capacitor and method for manufacturing the same |
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2016
- 2016-06-15 CN CN201620591393.2U patent/CN205920877U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106169370A (en) * | 2016-06-15 | 2016-11-30 | 格力电器（合肥）有限公司 | Chip multilayer ceramic capacitor and method for manufacturing the same |
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