CN208970357U - Variable condenser using the external electrode of multilayer ceramic capacitor as fixed electrode - Google Patents
Variable condenser using the external electrode of multilayer ceramic capacitor as fixed electrode Download PDFInfo
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- CN208970357U CN208970357U CN201822008069.5U CN201822008069U CN208970357U CN 208970357 U CN208970357 U CN 208970357U CN 201822008069 U CN201822008069 U CN 201822008069U CN 208970357 U CN208970357 U CN 208970357U
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Abstract
The utility model provides the variable condenser using the external electrode of multilayer ceramic capacitor as fixed electrode, including the first component and second component, the first component includes an external electrode or two external electrodes for multilayer ceramic capacitor, the second component includes the ceramic dielectric of multilayer ceramic capacitor and the electric conductor in ceramic dielectric side setting, the electric conductor changes the contact area size with the ceramic dielectric according to the size of ambient pressure, to change the capacitance between external electrode and electric conductor.The variable condenser of the utility model can change whole capacitance by ambient pressure, can greatly reduce cost, and have greatly production convenience.
Description
Technical field
The utility model relates to a kind of capacitors, more specifically, being related to the external electrode using multilayer ceramic capacitor
Variable condenser as fixed electrode.
Background technique
Currently, existing frequently-used plate condenser, as shown in Figure 1, being equipped with dielectric constant material between electrode A and electrode B
The capacitance of C, this plate condenser immobilize, and application range is very small.And generally volume is big, installation is complicated, measurement electricity
Road power consumption is big, at high cost, and is difficult to apply in specific application.
In addition, United States Patent (USP) US5206785 discloses a kind of implementation method of variable condenser.As Figure 2-3, the party
Method is using the disk of high dielectric constant material plus wherein one side attachment conductive electrode as key components and parts.This components are
Through being widely used in electronic pen, as the sensor for measuring weight of writing.However, in order to reach variable capacitance have it is biggish
Variation range is convenient for measuring circuit detection, this key components and parts requires to manufacture using the material of high dielectric constant, such as TiO2
Srx Oy.In order to which the solid ceramic after guaranteeing deformable electric conductor and firing has reliable contact surface, it usually needs to solid ceramic
Surface be processed by shot blasting.In order to establish one layer of firm conductive electrode on solid ceramic surface, need using metal coating
Metal electrode is deposited on solid ceramic surface by technique.In order to adapt to install pressure biography in narrow, the fine structure in pen
Sensor needs to carry out accurate cutting to solid ceramic.The variable capacitance uses large amount of complex, dedicated manufacturing process, production
Required precision is high, causes this key components and parts with high costs, is monopolized by a small number of producers, hinders making extensively for this technology
With.
Utility model content
The technical purpose of the utility model is the shortcomings that overcoming in the prior art；A kind of use multilayer pottery at low cost is provided
Variable condenser of the external electrode of porcelain condenser as fixed electrode.
To realize the above technical purpose, the technical solution of the utility model is: using the external electrical of multilayer ceramic capacitor
Variable condenser of the pole as fixed electrode, including the first component and second component, the first component include multi-layer ceramic capacitance
An external electrode or two external electrodes for device, the external electrode and the multiple electricity being set to inside multilayer ceramic capacitor
Pole layer connection；The second component includes the ceramic dielectric of multilayer ceramic capacitor and leading in ceramic dielectric side setting
Electric body, the electric conductor deform after by pressure, the close configuration of the ceramic dielectric and electric conductor of the multilayer ceramic capacitor, multilayer
The two sides of ceramic capacitor are equipped with external electrode, and the electric conductor changes and the ceramic dielectric according to the size of ambient pressure
Contact area size, to change the capacitance between external electrode and electric conductor.
Further, two external electrodes be respectively arranged on multilayer ceramic capacitor two sides and respectively with multi-layer ceramic capacitance
Multiple electrodes layer connection inside device；The interlaced setting of the multiple electrode layer of two sides.
Further, there are gaps between the electric conductor and multilayer ceramic capacitor, and the electric conductor is in ambient pressure
Lower deformation is simultaneously contacted with ceramic dielectric, and gap disappears.
Further, after removing the ambient pressure on the electric conductor, electric conductor is no longer contacted with ceramic dielectric, the two it
Between restore gap.
Further, it is equipped with an insulation supplementary structure, the insulation supplementary structure is located at the electric conductor and multi-layer ceramics
Between capacitor.
Further, using any one external electrode in two external electrodes of the multi-layer ceramic capacitance as one
The variable condenser electrode electric connecting point.
Further, two external electrodes of the multi-layer ceramic capacitance are electrically connected together described variable as one
Electrode for capacitors electric connecting point.
Further, using the electric conductor as another variable condenser electrode electric connecting point.
It further, further include the mechanical movement bringing device for implementing ambient pressure to the electric conductor, the mechanical fortune
The surface of dynamic bringing device is spherical or arcwall face.
Further, multiple external electrodes using multilayer ceramic capacitor as fixed electrode variable condenser it
Between serial or parallel connection use.
Variable condenser of the external electrode using multilayer ceramic capacitor of the utility model as fixed electrode, have with
It is lower the utility model has the advantages that
1, the variable condenser of the utility model can change whole capacitance by ambient pressure, can greatly drop
Low cost, and there is greatly production convenience.
2, the utility model electric conductor uses the electric conductor with elasticity or flexible nature, enables to deform after by pressure
Electric conductor can return to original state, Reusability, to improve whole service life.
3, the utility model can also make electric conductor generate shape small as far as possible upon application of pressure using insulation supplementary structure
Become, to extend the service life of electric conductor；Electric conductor can also be made in the case where applying ambient pressure, with multi-layer ceramics electricity
The contact area of container meets application requirement with the variation of pressure.
4, the utility model uses the characteristics of monolithic multilayer structure for manufacturing cost is low, and generates through pressure adjustable
Capacitance improves its benefit in addition, carrying out the adjustable extent of further expansion capacitance by the external electrode difference mode of connection
With rate.
5, the multilayer ceramic capacitor of the utility model uses the multiple-piece construction of staggered electrode layer, when electric conductor is by pressure
When deformation, change the contact area of electric conductor and medium, and then change the integral capacitor value of variable condenser, has good
Linear and precision.
6, variable condenser of the multiple external electrodes using multilayer ceramic capacitor of the utility model as fixed electrode
Between serial or parallel connection use, facilitate array large-scale use.
7, the structural principle of the variable condenser of the utility model is simple, and each component, can all using general-purpose device
Substantially reduce whole manufacturing cost.
The additional aspect of the utility model and advantage will be set forth in part in the description, partially will be from following description
In become obvious, or recognized by the practice of the utility model.
Detailed description of the invention
Fig. 1 is existing plate condenser schematic diagram；
Fig. 2 is the structural schematic diagram of existing variable condenser；
Fig. 3 is existing variable condenser by the deformation schematic diagram after ambient pressure；
Fig. 4 is the structural schematic diagram of the variable condenser of the utility model；
Fig. 5 is the appearance diagram of the multilayer ceramic capacitor of the utility model；
Fig. 6 is the schematic diagram of the section structure of the multilayer ceramic capacitor of the utility model；
Fig. 7 is the schematic diagram of the section structure of the variable condenser of the utility model；
Wherein, 1, multilayer ceramic capacitor；2, electric conductor；3, ceramic dielectric；4, mechanical movement bringing device；11, external
Electrode；12, electrode layer；21, insulate supplementary structure；
A, electrode；B, electrode；C, dielectric；A ', electrode；B ', electric conductor；C ', dielectric.
Specific embodiment
The embodiments of the present invention are described below in detail, examples of the embodiments are shown in the accompanying drawings, wherein from beginning
Same or similar element or element with the same or similar functions are indicated to same or similar label eventually.Below by ginseng
The embodiment for examining attached drawing description is exemplary, it is intended to for explaining the utility model, and should not be understood as to the utility model
Limitation.
The core of technical solutions of the utility model is to make using one or two external electrode of multilayer ceramic capacitor
For fixed electrode, deformable electric conductor is set as moving electrode in the ceramic dielectric side of multilayer ceramic capacitor, and then according to can
The external pressure that deformation electric conductor is born changes the contact area size of deformable electric conductor and ceramic dielectric, formed one it is new
Variable condenser.Namely it can as dielectric between fixed electrode and moving electrode using the ceramic dielectric of multilayer ceramic capacitor
Variodenser, and when implementing, it may be provided with cavity between ceramic dielectric and deformable electric conductor.Deformable electric conductor uses
Conductive rubber or metallic film or ITO conductive film can be selected as deformable conduction in an implementation in deformable material production
Body；The conductive film or conduction cloth or organic conductive gel that silk-screen silver paste can also be selected are as deformable electric conductor；It is described
Deformable electric conductor deforms after by pressure, in an implementation, multilayer ceramic capacitor and the close configuration of deformable electric conductor.It both can be with
Using any one electrode in two external electrodes of multilayer ceramic capacitor, two external electrodes can also be connected into work
It is used for an electrode.
Dielectric constant material abbreviation dielectric.The utility model uses the principle of capacity plate antenna, and the calculating of capacitance is public
Formula, the calculation formula of the capacitance of reference plate capacitor are as follows:, (1)；
Wherein, capacitance, unit F are indicated；
Indicate relative dielectric constant；
Indicate permittivity of vacuum, the 8.86 × side 10(-12) unit F/m；
Indicate area S, unit square rice；
Indicate pole plate spacing, unit rice.
As Fig. 1-3 can explain the working principle of existing variable condenser.Fig. 1 is the structure of existing plate condenser
Model.Capacity plate antenna includes electrode A, electrode B and dielectric C.According to formula (1), the capacitance of available capacity plate antenna.Figure
2 be the structural model of variable condenser in United States Patent (USP) US5206785, and essence is also a plate condenser.Electrode A ' phase
When the electrode A in capacity plate antenna model, electric conductor B ' is equivalent to the electrode B in plate condenser model, and dielectric C ' is suitable
Dielectric C in plate condenser model.
In the variable condenser example being widely used at present, the area of electrode is usually at 100 square millimeters or less.Usually
Using the through-hole annulus of thickness 0.2mm by one the air gap of reservation between dielectric and deformable electrode.In standard atmospheric pressure
Under, relative dielectric constant ε=1.00053 of not carbonated dry air, the capacity plate antenna according to formula (1), in Fig. 2
The capacitance of device is in 0.1pf or less.
Fig. 3 is structural model of the variable condenser after by ambient pressure in United States Patent (USP) US5206785.Electric conductor B ' is outside
It deforms under boundary's pressure and is contacted with dielectric C '.The air gap at this time is without the capacitance of calculate flat board capacitor needs
It is calculated with the relative dielectric constant of dielectric C '.According to the data that United States Patent (USP) US5206785 is provided, the material of dielectric C '
For TiO2 Sr4 Oy, relative dielectric constant is 7000, dielectric C ' with a thickness of 2 millimeters.Assuming that electric conductor B ' deformation and with electricity
When medium C ' contact area is 1 square millimeter, calculate electric conductor B ' and electrode A with formula (1) ' between capacitor be 31.01pf.
The capacitance of this magnitude, the very simple measuring circuit of use can be measured.
It is electric as determining using the external electrode of multilayer ceramic capacitor such as Fig. 4-7 in one embodiment of the utility model
The variable condenser of pole, including the first component and second component, the first component include an external electrical of multilayer ceramic capacitor 1
Pole 11 or two external electrodes 11, second component include the ceramic dielectric 3 of multilayer ceramic capacitor 1, set in 3 side of ceramic dielectric
The electric conductor 2 set, electric conductor 2 deform after by pressure, multilayer ceramic capacitor 1 and the close configuration of electric conductor 2, multi-layer ceramic capacitance
The two sides of device 1 are equipped with external electrode 11, external electrode 11 and the multiple electrodes layer 12 being set to inside multilayer ceramic capacitor 1
Connection；Electric conductor 2 changes the contact area size with ceramic dielectric 3 according to the size of ambient pressure, to change external electrode
Capacitance between 11 and electric conductor 2.
In another embodiment of the utility model, the interlaced setting of electrode layer 12 of two sides, such structure can be with
Greatly reduce the area of ceramic dielectric.
Assuming that a length of 3.2 millimeters of the multilayer ceramic capacitor of the utility model, width is 2.5 millimeters, with a thickness of 1.8 millis
The dielectric of rice, capacitor is X5R, and the dielectric relative dielectric constant of X5R is between 1000-20000.It follows that multilayer is made pottery
Electrode layer in porcelain condenser near outer surface is no more than to the dielectric thickness between this multilayer ceramic capacitor outer surface
0.9 millimeter, dielectric, that is, ceramic dielectric area of this multilayer ceramic capacitor surface non-conductive is more than 4 square millimeters.Assuming that this
The dielectric relative dielectric constant of the variable condenser of utility model is 7000, and the contact area of electric conductor and ceramic dielectric is 1
Square millimeter, formula (1) are calculated, then electric conductor and the interelectrode capacitor of multi-layer ceramic capacitance are greater than 60pf.Thus
The variable condenser of device configuration in actual measurement, in the case where changing ambient pressure, is readily apparent 1pf-100pf
Variable quantity, effect is ideal.
In addition, the characteristics of multilayer ceramic capacitor is low equivalent resistance, high pressure resistant/high temperature, small in size, capacitance swing
Width is the most widely used component of electronic field, and huge dosage makes the Market competition of multilayer ceramic capacitor, in turn
Keep multilayer ceramic capacitor cheap.The utility model uses multilayer ceramic capacitor to make as one or two external electrode
Manufacture craft for the variable condenser of fixed electrode is simpler than the manufacture craft of variable condenser in United States Patent (USP) US5206785,
To reduce process costs.
There are gap between electric conductor 2 and multilayer ceramic capacitor 1, electric conductor 2 deforms under ambient pressure and and multilayer
The dielectric 3 on 1 surface of ceramic capacitor contacts, and gap disappears.
After removing the ambient pressure on electric conductor 2, electric conductor 2 is no longer contacted with multilayer ceramic capacitor 1, extensive between the two
Multiple gap.
In another embodiment of the utility model, in order to make electric conductor 2 in the case where applying ambient pressure, with multilayer
The contact area of ceramic capacitor 1 changes with the variation of pressure, and the utility model is additionally provided with an insulation supplementary structure 21, absolutely
Edge supplementary structure 21 is between electric conductor 2 and multilayer ceramic capacitor 1.
In another embodiment of the utility model, for the ease of extending the capacitance and capacitance characteristic of variable condenser,
One variable condenser is used as using any one external electrode 11 in two external electrodes 11 of multilayer ceramic capacitor
Electrode electric connecting point.
Two external electrodes 11 of multi-layer ceramic capacitance can also be electrically connected together as a variable capacitance
Device electrode electric connecting point.
It regard electric conductor 2 as another variable condenser electrode electric connecting point.
It further include the mechanical movement application that electrical conductor 2 implements ambient pressure in another embodiment of the utility model
Device, the surface of mechanical movement bringing device are spherical or arcwall face.
In another embodiment of the utility model, it is many to meet the material that electric conductor 2 deforms after by pressure at present, mainly
Being divided into after deforming can restorer after irrecoverable material and deformation.In order to enable the electric conductor 2 deformed after by pressure can
It returns to original state, Reusability, electric conductor 2 is using the electric conductor 2 with elasticity or flexible nature.
The variable condenser of the utility model can change whole capacitance by ambient pressure, can greatly reduce
Cost, and there is greatly production convenience.
The characteristics of multilayer ceramic capacitor of the utility model uses this monolithic multilayer structure is manufacturing cost is low, body
Product is small, adapts to the application of a variety of occasions, and adjustable capacitance can also be generated by pressure, and the physical quantity of measurement is with pressure
Transformation it is obvious, be easy measurement, and whole low in energy consumption of circuit, there is good linear and precision.
In another embodiment of the utility model, multiple external electrodes using multilayer ceramic capacitor are as fixed electrode
Variable condenser between serial or parallel connection use, facilitate array large-scale use.
The structural principle of the variable condenser of the utility model is simple, and each component is all using general-purpose device, Neng Gou great
It is big to reduce whole manufacturing cost.
Although the embodiments of the present invention have been shown and described above, it is to be understood that above-described embodiment is
Illustratively, it should not be understood as limiting the present invention, those skilled in the art are not departing from the utility model
Principle and objective in the case where above-described embodiment can be changed in the scope of the utility model, modify, replace and
Modification.The scope of the utility model is extremely equally limited by appended claims.
Claims (9)
1. the variable condenser using the external electrode of multilayer ceramic capacitor as fixed electrode, it is characterised in that: including first
Component and second component, the first component include an external electrode or two external electrodes for multilayer ceramic capacitor, institute
External electrode is stated to be connected to the multiple electrodes layer being set to inside multilayer ceramic capacitor；The second component includes multi-layer ceramics
The ceramic dielectric of capacitor and the electric conductor being arranged in the ceramic dielectric side, the electric conductor deforms after by pressure, described
For the ceramic dielectric and electric conductor of multilayer ceramic capacitor close to configuration, the two sides of multilayer ceramic capacitor are equipped with external electrode,
The electric conductor changes the contact area size with the ceramic dielectric according to the size of ambient pressure, to change external electrode
Capacitance between electric conductor.
2. the variable condenser using the external electrode of multilayer ceramic capacitor as fixed electrode as described in claim 1,
Be characterized in that: two external electrodes are respectively arranged on the two sides of multilayer ceramic capacitor and respectively and inside multilayer ceramic capacitors
The connection of multiple electrodes layer；The interlaced setting of the multiple electrode layer of two sides.
3. the variable condenser using the external electrode of multilayer ceramic capacitor as fixed electrode as described in claim 1,
Be characterized in that: there are gaps between the electric conductor and multilayer ceramic capacitor.
4. the variable condenser using the external electrode of multilayer ceramic capacitor as fixed electrode as described in claim 1,
Be characterized in that: being equipped with an insulation supplementary structure, the insulation supplementary structure be located at the electric conductor and multilayer ceramic capacitor it
Between.
5. the variable condenser using the external electrode of multilayer ceramic capacitor as fixed electrode as described in claim 1,
It is characterized in that: described variable as one using any one external electrode in two external electrodes of the multi-layer ceramic capacitance
Electrode for capacitors electric connecting point.
6. the variable condenser using the external electrode of multilayer ceramic capacitor as fixed electrode as described in claim 1,
It is characterized in that: two external electrodes of the multi-layer ceramic capacitance is electrically connected together as a variable condenser electricity
Pole electric connecting point.
7. the variable condenser using the external electrode of multilayer ceramic capacitor as fixed electrode as described in claim 1,
It is characterized in that: using the electric conductor as another variable condenser electrode electric connecting point.
8. the variable condenser using the external electrode of multilayer ceramic capacitor as fixed electrode as described in claim 1,
It is characterized in that: the mechanical movement bringing device including implementing ambient pressure to the electric conductor, the mechanical movement bringing device
Surface be spherical or arcwall face.
9. as the described in any item external electrodes using multilayer ceramic capacitor of claim 1-8 as fixed electrode can power transformation
Container, it is characterised in that: multiple external electrodes using multilayer ceramic capacitor as fixed electrode variable condenser it
Between serial or parallel connection use.
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN109473283A (en) * | 2018-12-03 | 2019-03-15 | 伍颖超 | Variable condenser using the external electrode of multilayer ceramic capacitor as fixed electrode |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109473283A (en) * | 2018-12-03 | 2019-03-15 | 伍颖超 | Variable condenser using the external electrode of multilayer ceramic capacitor as fixed electrode |
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