CN104952570A - Piezoresistor of integrated gas discharge tube - Google Patents

Piezoresistor of integrated gas discharge tube Download PDF

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Publication number
CN104952570A
CN104952570A CN201410118192.6A CN201410118192A CN104952570A CN 104952570 A CN104952570 A CN 104952570A CN 201410118192 A CN201410118192 A CN 201410118192A CN 104952570 A CN104952570 A CN 104952570A
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China
Prior art keywords
hollow pipe
piezo
resistance
electrode
gas discharge
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CN201410118192.6A
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Chinese (zh)
Inventor
周垠群
蔡锦波
王久
骆建辉
高桂丽
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SHENZHEN BENCENT ELECTRONICS CO Ltd
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SHENZHEN BENCENT ELECTRONICS CO Ltd
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Priority to CN201410118192.6A priority Critical patent/CN104952570A/en
Publication of CN104952570A publication Critical patent/CN104952570A/en
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Abstract

The embodiment of the invention discloses a piezoresistor of an integrated gas discharge tube. The piezoresistor comprises a first cylindrical electrode, a first hollow pipe, and a piezoresistor body in a flat plate structure, or a cup-shaped piezoresistor body with a concave longitudinal section, wherein the first cylindrical electrode, the first hollow pipe and the piezoresistor body in a flat plate structure or the cup-shaped piezoresistor body are hermetically connected to form an airtight cavity in which an inert gas is stored. The piezoresistor further comprises a second cylindrical electrode in the airtight cavity, the inner surface and outer surface of the cup-shaped piezoresistor body are coated with electrode layers made of conductive materials, the electrode layer on the inner surface serves as a common electrode of the cup-shaped piezoresistor body and the gas discharge tube, so that the piezoresistor body and the gas discharge tube are connected in series to achieve the purpose of excess voltage protection, the piezoresistor body and the gas discharge tube are integrated, so that the problems of low excess voltage protection performance and poor stability of the piezoresistor body are solved, and the follow current problem of the single follow current in application of a power circuit is also solved.

Description

A kind of piezo-resistance of integrated gas discharge tube
Technical field
The application relates to overvoltage protection field, is specifically related to a kind of piezo-resistance of integrated gas discharge tube.
Background technology
In overvoltage protection technical field; piezo-resistance has a kind of electrical characteristics; when being added in the voltage in piezo-resistance and exceeding itself threshold value; the resistance of piezo-resistance can diminish; just make the instantaneous surge of electric current flowing through piezo-resistance, then the electric current flowing through other circuit is normal, thus reduces overvoltage to the impact of follow-up sensitive circuit; thus usually use piezo-resistance to suppress the abnormal overvoltage often occurred in circuit, protective circuit is from superpotential infringement.But when being added in the threshold value of the voltage in piezo-resistance lower than itself, still Weak current is had to flow through piezo-resistance, and this electric current can increase along with service time, action frequency increases, and increase, make a large amount of energy accumulation, cause its temperature constantly to raise, finally cause piezo-resistance to be blasted or catching fire.The problem that the anti-overvoltage performance caused in view of the physical characteristic of piezo-resistance own is low, also have in other professional domains and adopt gas discharge tube to realize overvoltage protection object, mainly utilize the certain density inert gas stored in gas discharge tube, when transient voltage occurs, gas in gas discharge tube is ionized, it just becomes short-circuit condition immediately, so the voltage of gas discharge tube just drops to rapidly a very low value, to realize overvoltage protection object, for solving the afterflow problem after gas discharge tube action, generally be operating as at present and piezo-resistance and gas discharge tube series connection are used, utilize the over-pressure barrier propterty of gas discharge tube solution piezo-resistance compressive property low and blast, the problem of burning, utilize piezo-resistance to solve the problem of gas discharge tube effect subsequent flows time length simultaneously.
But, current piezo-resistance and gas discharge tube are all separate existence in circuit application, used with discrete component form separately, when discrete component is applied on miniature electronic product by the electronic product microminiaturized epoch, not only need to consider gas discharge tube and piezo-resistance circuit layout in the circuit board and welding procedure level, and the specifications and models of discrete component are numerous, relative to single overvoltage protection circuit field, discrete component quantity is more, the type selecting of application element thereof is more complicated, and application working (machining) efficiency is lower; And add man-hour requirement multiple element is welded together, not only production process very complicated, and more process time can be expended, reduce Product processing efficiency further.In addition, the electrode area of piezo-resistance determines the through-current capability of piezo-resistance, so electrode area is larger, through-current capability is larger.If when piezo-resistance uses as discrete component, demand that is structure formed and through-current capability produces contradiction on technology realizes, and therefore the through-current capability of piezo-resistance becomes a large bottleneck of piezo-resistance technical development.
Summary of the invention
The embodiment of the present application provides a kind of piezo-resistance of integrated gas discharge tube, solve the problem that anti-overvoltage performance that existing piezo-resistance causes due to physical characteristic own is low, solve the circuit layout of the discrete element application such as piezo-resistance when miniaturized electronic product further more difficult, the problem that welding procedure level requirement is high.
First aspect, the embodiment of the present application provides a kind of piezo-resistance of integrated gas discharge tube, from bottom to top comprise base plate, the first hollow pipe successively and with described first hollow pipe, there is the first cylinder electrode of identical central axle, described first cylinder electrode, described first hollow pipe and described base plate sealing-in are combined into the airtight cavity storing inert gas, the outer surface of described base plate is provided with the first electrode layer that electric conducting material is made, described base plate is made by piezoresistive material, and described first hollow pipe is porcelain tube.
In conjunction with first aspect, in the implementation that the first is possible, the outer surface of described base plate is provided with the first electrode layer that electric conducting material is made, and comprising:
The lower surface of the outer surface of described base plate is provided with described first electrode layer that described electric conducting material is made.
In conjunction with the first possible implementation of first aspect, in the implementation that the second is possible, the piezo-resistance of described integrated gas discharge tube also comprises:
Be arranged in the second cylinder electrode of described airtight cavity with described first cylinder Electrode connection shape all-in-one-piece, the inner surface of described second cylinder electrode and described airtight cavity is separated by, to form discharging gap; Or,
Described piezo-resistance also comprises:
The second cylinder electrode of described airtight cavity is arranged in described first cylinder Electrode connection shape all-in-one-piece, and the lower surface of the sidewall of described second cylinder electrode and/or described second cylinder electrode is coated with the second electrode lay that electronic emission material is made, wherein, the inner surface of described second cylinder electrode and described airtight cavity is separated by, to form discharging gap.
In conjunction with the first possible implementation of first aspect or first aspect or the possible implementation of the second, in the implementation that the third is possible, the edge of described base plate to the distance of described central shaft equals the distance of outer wall to described central shaft of described first hollow pipe; And,
The upper surface of described base plate is provided with that electric conducting material is made and is arranged in the third electrode layer of described airtight cavity; Or,
The upper surface of described base plate is provided with that electric conducting material is made and is arranged in the third electrode layer of described airtight cavity, and the surface of described third electrode layer that arranges, the upper surface of described base plate is provided with the 4th electrode layer that electronic emission material is made.
In conjunction with the third possible implementation of first aspect, in the 4th kind of possible implementation, the piezo-resistance of described integrated gas discharge tube also comprises:
The second hollow pipe be integrated with described base plate is connected with between described base plate and described first hollow pipe, wherein, described second hollow pipe and described base plate form the cup-shaped piezo-resistance that longitudinal section is spill, the upper surface of described second hollow pipe is connected to the lower surface of described first hollow pipe, and the upper surface of described first hollow pipe is connected to the lower surface of described first cylinder electrode, described first cylinder electrode, described first hollow pipe and described cup-shaped piezo-resistance sealing-in composition store the described airtight cavity of inert gas, inner surface and the described first cylinder electrode separation of described cup-shaped piezo-resistance form discharging gap, wherein, described cup-shaped piezo-resistance is made by piezoresistive material.
In conjunction with the 4th kind of possible implementation of first aspect, in the 5th kind of possible implementation, the piezo-resistance of described integrated gas discharge tube also comprises:
The lateral wall of described second hollow pipe is provided with the 5th electrode layer that electric conducting material is made, and the outer surface of described 5th electrode layer and/or described first electrode layer is provided with the first encapsulated layer that insulating material is made; And/or,
The madial wall of described second hollow pipe is provided with the 6th electrode layer that electric conducting material is made.
In conjunction with the 5th kind of possible implementation of first aspect, in the 6th kind of possible implementation, the piezo-resistance of described integrated gas discharge tube also comprises:
The surface of described 6th electrode layer that the madial wall being positioned at described second hollow pipe is arranged is provided with the 7th electrode layer that electronic emission material is made.
In conjunction with the 6th kind of possible implementation of first aspect, in the 7th kind of possible implementation, described cup-shaped piezo-resistance and/or described base plate and/or described first cylinder electrode comprise respectively extend laterally and the first electrode leading-out terminal connected for circuit; And,
The piezo-resistance of described integrated gas discharge tube also comprises:
Be connected with described first cylinder electrode coaxial between the upper surface of described first hollow pipe and the lower surface of described first cylinder electrode, and for the first sealing layer of the first cylinder electrode and described first hollow pipe described in sealing-in; And/or,
Be connected with described first cylinder electrode coaxial between the lower surface of described first hollow pipe and the upper surface of described second hollow pipe, and for the second sealing layer of the first hollow pipe described in sealing-in and described second hollow pipe.
In conjunction with the 7th kind of possible implementation of first aspect, in the 8th kind of possible implementation, described second sealing layer is described second sealing layer made by insulating material, and the lateral wall of described second hollow pipe is provided with the 5th electrode layer that electric conducting material is made, and comprising:
The lateral wall of described second hollow pipe is provided with that electric conducting material is made, and coated area equals described 5th electrode layer of the area of the lateral wall of described second hollow pipe.
In conjunction with the 7th kind of possible implementation of first aspect, in the 9th kind of possible implementation, described second sealing layer is described second sealing layer made by electric conducting material, and the lateral wall of described second hollow pipe is provided with the 5th electrode layer that electric conducting material is made, and comprising:
The lateral wall of described second hollow pipe is provided with that electric conducting material is made, and described 5th electrode layer of being separated by with the upper surface of described second hollow pipe.
In conjunction with the 8th kind of possible implementation of first aspect, in the tenth kind of possible implementation, described first cylinder electrode and described base plate are cylinder, described first hollow pipe and described second hollow pipe are annular, the diameter of described first cylinder electrode, the diameter of described base plate, the external diameter of described first hollow pipe is identical with the external diameter of described second hollow pipe, and the internal diameter of described first hollow pipe is identical with the internal diameter of described second hollow pipe.
In conjunction with the 9th kind of possible implementation of first aspect, in the 11 kind of possible implementation, described first cylinder electrode and described base plate are square cylinder, described first hollow pipe and described second hollow pipe are square hollow, described first cylinder electrode, described base plate, the outer wall of described first hollow pipe and the outer wall of described second hollow pipe overlap in the projection of the plane at the central shaft place perpendicular to described first cylinder electrode, the inwall of described first hollow pipe and the inwall of described second hollow pipe overlap in the projection of the plane at the described central shaft place perpendicular to described first cylinder electrode.
In conjunction with the first possible implementation of first aspect or first aspect or the possible implementation of the second, in the 12 kind of possible implementation, the edge of described base plate to the distance of described central shaft is greater than the distance of outer wall to described central shaft of described first hollow pipe, the upper surface of described base plate is provided with the 8th electrode layer that electric conducting material is made, described first hollow pipe is connected with described base plate by described 8th electrode layer, the edge of described 8th electrode layer to the distance of described central shaft is less than the distance of edge to described central shaft of described base plate.
In conjunction with the 12 kind of possible implementation of first aspect, in the 13 kind of possible implementation, described base plate is cylinder or square cylinder, the outer surface of the piezo-resistance of described integrated gas discharge tube is provided with the second encapsulated layer that insulating material is made, and described base plate and described first cylinder electrode comprise respectively and extend to the second electrode leading-out terminal that is outside described second encapsulated layer and that be connected for circuit; And,
Described first cylinder electrode is cylinder, and described first hollow pipe is annular hollow pipe; Or,
Described first cylinder electrode is square cylinder, and described first hollow pipe is square hollow.
Second aspect, the embodiment of the present application provides a kind of piezo-resistance of integrated gas discharge tube, comprise the piezo-resistance of two integrated gas discharge tubes that the application's first aspect of being oppositely arranged provides, the described first cylinder Electrode connection of the piezo-resistance of described two integrated gas discharge tubes; The piezo-resistance of the integrated gas discharge tube that the application's second aspect provides also comprises:
The described first cylinder electrode of the piezo-resistance of two integrated gas discharge tubes of described the application's first aspect is provided with through hole corresponding up and down, and described airtight cavity also comprises form discharging gap respectively with described first cylinder electrode two independently third electrodes, mutually separates between described first cylinder electrode and described two third electrodes.
The piezo-resistance of the integrated gas discharge tube that the embodiment of the present application provides, from bottom to top comprises base plate/cup-shaped piezo-resistance, the first hollow pipe successively and has the first cylinder electrode of identical central axle with described first hollow pipe.Wherein, first hollow pipe, for the piezo-resistance of slab construction or longitudinal section are that the cup-shaped piezo-resistance of spill and the first cylinder electrode are combined into the airtight cavity storing inert gas by sealing-in mode, and the outer surface of piezo-resistance is provided with electrode layer, wherein, first cylinder electrode can be used as an electrode of gas discharge tube, the electrode layer of the outer surface setting of piezo-resistance can be used as an electric connection terminal of piezo-resistance, when gas discharge tube effect, inert gas in airtight cavity can inspire the public electrode of electronics as gas discharge tube and piezo-resistance, overvoltage protection object is reached to make piezo-resistance and gas discharge tube series connection.In the present embodiment, piezo-resistance and gas discharge tube are integrated; solve the problem of the low and stability of the overvoltage protection performance of piezo-resistance; and be convenient to the circuit layout of miniature electronic product in the electronic product microminiaturized epoch, and reduce the welding procedure level of components and parts.And the integrated component that the present embodiment provides is relative to single overvoltage protection circuit field, the type selecting of application element thereof is simple, and the production process of electronic product is simple, reduces process time, improves Product processing efficiency.
And the cup-shaped piezo-resistance provided in the embodiment of the present application, the outer surface of described piezo-resistance can be made by coated with conductive material, and coated area is very large or equal the electrode layer of area of lateral wall of described cup-shaped piezo-resistance, then increase the electrode area of piezo-resistance, determine the high throughflow ability of piezo-resistance, solve the structure formed of piezo-resistance and the contradiction of through-current capability demand on technology realizes, overcome the too low large bottleneck in piezo-resistance technical development process of through-current capability of piezo-resistance.
Accompanying drawing explanation
In order to be illustrated more clearly in the embodiment of the present application or technical scheme of the prior art, be briefly described to the accompanying drawing used required in embodiment or description of the prior art below, apparently, accompanying drawing in the following describes is only some embodiments of the application, for those of ordinary skill in the art, under the prerequisite not paying creative work, other accompanying drawing can also be obtained according to these accompanying drawings.
The sectional structure chart of a kind of piezo-resistance that Fig. 1 provides for the embodiment of the present application;
The external structure of a kind of piezo-resistance that Fig. 2 a provides for the embodiment of the present application;
The external structure of the another kind of piezo-resistance that Fig. 2 b provides for the embodiment of the present application;
The equivalent circuit diagram of a kind of piezo-resistance that Fig. 3 provides for the embodiment of the present application;
The sectional structure chart of a kind of piezo-resistance that Fig. 4 a provides for the embodiment of the present application;
The sectional structure chart of the another kind of piezo-resistance that Fig. 4 b provides for the embodiment of the present application;
The sectional structure chart of the another kind of piezo-resistance that Fig. 5 provides for the embodiment of the present application;
The sectional structure chart of the another kind of piezo-resistance that Fig. 6 provides for the embodiment of the present application;
The sectional structure chart of the another kind of piezo-resistance that Fig. 7 provides for the embodiment of the present application;
The plan structure figure of the another kind of piezo-resistance that Fig. 8 provides for the embodiment of the present application;
The side-looking structure chart of the another kind of piezo-resistance that Fig. 9 provides for the embodiment of the present application.
Embodiment
Below in conjunction with the accompanying drawing in the embodiment of the present application, be clearly and completely described the technical scheme in the embodiment of the present application, obviously, described embodiment is only some embodiments of the present application, instead of whole embodiments.Based on the embodiment in the application, those of ordinary skill in the art are not making the every other embodiment obtained under creative work prerequisite, all belong to the scope of the application's protection.
Below by specific embodiment, be described in detail respectively.
Present embodiments provide a kind of piezo-resistance of integrated gas discharge tube, comprise airtight cavity, this airtight cavity is from top to bottom successively by the first cylinder electrode, have the first hollow pipe of identical central axle with the first cylinder electrode, cup-shaped piezo-resistance forms with the electrode layer of the outer surface being positioned at cup-shaped piezo-resistance.Wherein, cup-shaped piezo-resistance comprises the second hollow pipe and base plate, and base plate and the second hollow pipe are combined into one, and wherein edge to the distance of central shaft of base plate equals the distance of outer wall to central shaft of the first hollow pipe.In the present embodiment, cup-shaped piezo-resistance is made by piezoresistive material, and the first hollow pipe is porcelain tube.And in the present embodiment, the electrode layer being positioned at the outer surface of cup-shaped piezo-resistance can be the outer surface being arranged on base plate and the electrode layer be made for electric conducting material.Specifically can arrange at the lower surface of the outer surface of base plate and/or sidewall the electrode layer that electric conducting material is made, in other embodiments, this electrode layer can be metallised electrode layer, concrete setting position and size unrestricted.
The piezo-resistance that the present embodiment provides improves traditional piezo-resistance structure, by piezo-resistance structure and gas discharge tube combined serial, and then realizes overvoltage protection object.Wherein, the cup-shaped piezo-resistance be made by piezoresistive material, first hollow pipe and the first cylinder electrode are combined into the airtight cavity storing inert gas by sealing-in mode, and the outer surface of cup-shaped piezo-resistance is provided with electrode layer, then the first cylinder electrode can be used as an electrode of gas discharge tube, the electrode layer of the outer surface setting of cup-shaped piezo-resistance can be used as an electric connection terminal of piezo-resistance, when gas discharge tube effect, inert gas in airtight cavity can inspire the public electrode of electronics as gas discharge tube and piezo-resistance, overvoltage protection object is reached to make piezo-resistance and gas discharge tube series connection, and the overvoltage protection performance solving piezo-resistance is low and the problem of stability, and the circuit layout of miniature electronic product is convenient in the electronic product microminiaturized epoch, and reduce the welding procedure level of the components and parts in miniature electronic, and make the production process of electronic product simple, reduce the process time of electronic product, and then improve the working (machining) efficiency of electronic product.
As the optional execution mode of one, the electrode layer being positioned at the outer surface of cup-shaped piezo-resistance can also realize in the following way:
The lateral wall of the second hollow pipe is provided with the electrode layer that electric conducting material is made; Or,
All be provided with electrode layer at the outer surface of base plate and the lateral wall of the second hollow pipe, in other embodiments, the setting position of this electrode layer and the realization of area be not by the restriction of the present embodiment.
In the present embodiment, the outer surface of cup-shaped piezo-resistance has electric conducting material to be made, and coated area is very large or equal the electrode layer of area of lateral wall of cup-shaped piezo-resistance, then increase the electrode area of piezo-resistance, determine the high throughflow ability of piezo-resistance, solve the structure formed of piezo-resistance and the contradiction of through-current capability demand on technology realizes, overcome the large bottleneck of through-current capability in piezo-resistance technical development process of piezo-resistance.
As the optional execution mode of one, the upper surface of base plate is provided with that electric conducting material is made and is arranged in the electrode layer of airtight cavity, and the width of this electrode layer equals the diameter of the inwall of the second hollow pipe.In other embodiments, the setting position of this electrode layer and area unrestricted.In present embodiment; this electrode layer can as another electrode of gas discharge tube; the public electrode of simultaneously connecting with gas discharge tube as piezo-resistance; make series connection overvoltage protection better effects if; and by the upper surface that is arranged at base plate and the electrode layer being arranged in airtight cavity can provide more original electron, be more conducive to exciting of the electronics of gas discharge tube.
As the optional execution mode of one, the surface of the electrode layer that the upper surface of base plate is arranged is provided with another electrode layer that electronic emission material is made, and in other embodiments, setting position and the area of this another electrode layer are unrestricted.In present embodiment, electrode when coating electronic emission material is more conducive to gas discharge tube action provides original electron.
As the optional execution mode of one, the madial wall of the second hollow pipe is provided with the electrode layer that electric conducting material is made.In present embodiment, the electrode layer that the madial wall of the second hollow pipe is arranged can as second of a gas discharge tube electrode, or the electrode layer arranged with the upper surface of base plate is jointly as second electrode of gas discharge tube, more original electron can be provided, more be conducive to exciting of the electronics of gas discharge tube, improve the electrode performance of gas discharge tube, and then improve the physical characteristic of gas discharge tube itself; Can be used as the public electrode that piezo-resistance is connected with gas discharge tube simultaneously, make the series connection overvoltage protection better effects if of the piezo-resistance of integrated gas discharge tube further.
As the optional execution mode of one, the surface of the electrode layer that the madial wall being positioned at the second hollow pipe is provided with is provided with the electrode layer that electronic emission material is made, in present embodiment, electrode when coating electronic emission material is more conducive to gas discharge tube action provides original electron.
As the optional execution mode of one, the piezo-resistance of integrated gas discharge tube also comprises with the first cylinder Electrode connection shape all-in-one-piece and is arranged in the second cylinder electrode of airtight cavity, the inner surface of the second cylinder electrode and airtight cavity is separated by, to form discharging gap.In present embodiment, the second cylinder electrode is connected with the first cylinder electrode, can be used as an electrode, can the overvoltage protection ability of lift gas discharge tube by arranging the second cylinder electrode.
As the optional execution mode of one, the sidewall of the second cylinder electrode and/or the lower surface of the second cylinder electrode are coated with the electrode layer that electronic emission material is made, and wherein, the inner surface of the second cylinder electrode and airtight cavity is separated by, to form discharging gap.In present embodiment, the electronic emission material of the second cylinder electrode surface coating can provide original electron, is more conducive to the action of gas discharge tube.
As the optional execution mode of one, cup-shaped piezo-resistance and/or base plate and/or the first cylinder electrode comprise respectively extend laterally and the first electrode leading-out terminal connected for circuit; And the piezo-resistance of integrated gas discharge tube also comprises:
Be connected with the first cylinder electrode coaxial between the upper surface of the first hollow pipe and the lower surface of the first cylinder electrode, and for the first sealing layer of sealing-in first cylinder electrode and the first hollow pipe; And/or,
Be connected with the first cylinder electrode coaxial between the lower surface of the first hollow pipe and the upper surface of the second hollow pipe, and for the second sealing layer of sealing-in first hollow pipe and the second hollow pipe.The sealing layer provided in present embodiment can improve the seal of airtight cavity, the performance of lift gas discharge tube.
As the optional execution mode of one, the second sealing layer is the second sealing layer made by insulating material, and the lateral wall of the second hollow pipe is provided with the electrode layer that electric conducting material is made, and comprising:
The lateral wall of the second hollow pipe is provided with that electric conducting material is made, and coated area equals the electrode layer of the area of the lateral wall of cup-shaped piezo-resistance.In present embodiment, the outer surface of cup-shaped piezo-resistance has electric conducting material to be made, and coated area equals the electrode layer of the area of the lateral wall of cup-shaped piezo-resistance, the longitudinal section then increasing piezoresistance electrode is amassed, determine the high throughflow ability of piezo-resistance, solve the structure formed of piezo-resistance and the contradiction of through-current capability demand on technology realizes, overcome the large bottleneck of through-current capability in piezo-resistance technical development process of piezo-resistance.
As the optional execution mode of one, the second sealing layer is the second sealing layer made by electric conducting material, and the lateral wall of the second hollow pipe is provided with the electrode layer that electric conducting material is made, and comprising:
The lateral wall of the second hollow pipe is provided with that electric conducting material is made, and the electrode layer of being separated by with the upper surface of the second hollow pipe, and the outer surface of the second cylinder electrode and the inner surface of the second sealing layer are separated by.
As the optional execution mode of one, first cylinder electrode and base plate are cylinder, first hollow pipe and the second hollow pipe are annular, the diameter of the first cylinder electrode, the diameter of base plate, the external diameter of the first hollow pipe is identical with the external diameter of the second hollow pipe, and the internal diameter of the first hollow pipe is identical with the internal diameter of the second hollow pipe.
As the optional execution mode of one, first cylinder electrode and base plate are square cylinder, first hollow pipe and the second hollow pipe are square hollow, the outer wall of the first cylinder electrode, base plate, the first hollow pipe and the outer wall of the second hollow pipe overlap in the projection of the plane at the central shaft place perpendicular to the first cylinder electrode, and the inwall of the first hollow pipe and the inwall of the second hollow pipe overlap in the projection of the plane at the central shaft place perpendicular to the first cylinder electrode.In other embodiments, the shape of the part of gas discharge tube and cup-shaped piezo-resistance is not restricted to the described embodiments, and realizes integrated gas discharge tube and the pressure-sensitive electric group of structure be cascaded to form airtight cavity for principle.
As the optional execution mode of one, the outer surface of the outer surface of the electrode layer of the lateral wall of the second hollow pipe and/or the electrode layer of described plate outer surface is provided with the encapsulated layer that insulating material is made.
Refer to Fig. 1, Fig. 2 a, Fig. 2 b and Fig. 3, wherein, the sectional structure chart of a kind of piezo-resistance that Fig. 1 provides for the embodiment of the present application; The external structure of a kind of piezo-resistance that Fig. 2 a provides for the embodiment of the present application; The external structure of the another kind of piezo-resistance that Fig. 2 b provides for the embodiment of the present application; The equivalent circuit diagram of a kind of piezo-resistance that Fig. 3 provides for the embodiment of the present application.As shown in Fig. 1 and Fig. 2 a, the piezo-resistance that the present embodiment provides comprises airtight cavity 10, airtight cavity 10 from top to bottom comprises the first cylinder electrode 110 successively, with the first cylinder electrode 110, there is the first hollow pipe 120 of identical central axle, cup-shaped piezo-resistance 130, second cylinder electrode 140, electrode layer 150 and electrode layer 160.As shown in Figure 1, the longitudinal section of the cup-shaped piezo-resistance 130 that the present embodiment provides is spill, wherein, cup-shaped piezo-resistance 130 comprises second hollow pipe 131 and base plate 132 with the first cylinder electrode 110 with identical central axle, the upper surface of base plate 132 is connected to the lower surface of the second hollow pipe 131, and is combined into one device with the second hollow pipe 131.When making cup-shaped piezo-resistance 130, the cup-shaped piezo-resistance 130 that cup-shaped moulds can be utilized to produce the second hollow pipe 131 and base plate 132 be integrated.In the present embodiment, as shown in Figure 2 a, first cylinder electrode 110 and base plate 132 are cylinder, first hollow pipe 120 and the second hollow pipe 131 are annular, and, the diameter of the first cylinder electrode 110 in the present embodiment, the diameter of base plate 132, the external diameter of the first hollow pipe 120 is identical with the external diameter of the second hollow pipe 131, namely the edge of base plate 132 is identical to the distance of central shaft with the outer wall of the second hollow pipe 131 to the distance of central shaft, and the edge of base plate 132 is identical to the distance of central shaft with the outer wall of the first hollow pipe 120 to the distance of central shaft, so just effectively can form airtight cavity with sealed inert gas.As shown in Figure 1, the internal diameter of the first hollow pipe 120 is identical with the internal diameter of the second hollow pipe 131.Wherein, the upper surface of the first hollow pipe 120 is connected to the lower surface of the first cylinder electrode 110, the upper surface of the second hollow pipe 131 of cup-shaped piezo-resistance 130 is connected to the lower surface of the first hollow pipe 120, then the first cylinder electrode 110, first hollow pipe 120 and cup-shaped piezo-resistance 130 sealing-in form the airtight cavity 10 storing inert gas, and second cylinder electrode 140 and the first cylinder electrode 110 there is identical central axle, and be arranged in airtight cavity 10, the upper surface of the second cylinder electrode 140 is connected to the lower surface of the first cylinder electrode 110, the lateral wall of the second cylinder electrode 140 and lower surface are separated with the inner surface of airtight cavity 10 respectively, main purpose avoids the second cylinder electrode 140 to be connected with the inner surface of cup-shaped piezo-resistance 130, namely as shown in Figure 1, the madial wall of airtight cavity 10 and the lateral wall of the second cylinder electrode 140 form the first gap, the lower surface of the second cylinder electrode 140 and the upper surface of base plate 132 form the second gap, first gap and the second gap are discharging gap.Wherein, when making the first cylinder electrode 110 and the second cylinder electrode 140, the cylinder electrode that unified Mold Making can be utilized to go out the first cylinder electrode 110 and the second cylinder electrode 140 be integrated, and in the present embodiment, second cylinder electrode 140 can be cylinder or longitudinal section is stair-stepping cylinder, and the shape of concrete second cylinder electrode 140 is not by the restriction of the present embodiment.
In the present embodiment, first hollow pipe 120 is porcelain tube, and electrode layer 150 is for being coated in the electric conducting material of the outer surface of cup-shaped piezo-resistance 130, the concrete visible lateral wall of the cup-shaped piezo-resistance 130 shown in Fig. 1 and the lower surface of base plate 132 are all coated with electric conducting material, and the electrode layer 150 that electric conducting material is made can be metallized electrode layer 150.And, the cup-shaped piezo-resistance 130 that cup-shaped piezo-resistance 130 is made for piezoresistive material.And, electrode layer 160 is for being coated in the electric conducting material of the inner surface of cup-shaped pressure surface resistance, the concrete visible madial wall of cup-shaped pressure surface resistance shown in Fig. 2 a and the upper surface of base plate 132 are all coated with electric conducting material, and the electrode layer 160 that concrete electric conducting material is made can be metallized electrode layer 160.In other embodiments, the coating position of electrode layer 150 can be on the sidewall of the lateral wall of the second hollow pipe 131 and/or the lower surface of base plate 132 and/or base plate 132, the coating position of concrete electrode layer 150 is not by the restriction of the present embodiment, and coated area is not also by the restriction of the present embodiment.And in other embodiments, the coating position of electrode layer 160 can only in the madial wall of the second hollow pipe 131 or the upper surface of base plate 132, and coating position and the coated area of concrete electrode layer 160 also do not limit by the present embodiment.
As shown in Figure 3, piezo-resistance equivalent electric circuit shown in Fig. 3 comprises two components and parts, gas discharge tube GDT and discrete piezoresistive element ZOM respectively, discrete piezoresistive element ZOM connects with gas discharge tube GDT, public electrode is g1, another electrode of gas discharge tube GDT is the electrode g2 shown in Fig. 3, another electrode of discrete piezoresistive element ZOM is the electrode z1 shown in Fig. 3, see figures.1.and.2 the piezo-resistance illustrated, first cylinder electrode 110 is the electrode g2 of the gas discharge tube GDT shown in Fig. 3, the electrode z1 that electrode layer 150 is the piezo-resistance ZOM shown in Fig. 3, in the present embodiment, the inner surface of cup-shaped piezo-resistance 130 is coated with electrode layer 160, electrode layer 160 can be used as the public electrode g1 of gas discharge tube GDT and piezo-resistance ZOM, the piezo-resistance provided in other embodiments can not have electrode layer 160 yet, then when gas discharge tube GDT is failure to actuate, piezo-resistance ZOM and gas discharge tube GDT is in off state, when gas discharge tube GDT action, inert gas in airtight cavity 10 can inspire the public electrode of electronics as gas discharge tube GDT and piezo-resistance ZOM, overvoltage protection object is reached to make piezo-resistance ZOM and gas discharge tube GDT series connection.
In the present embodiment, piezo-resistance ZOM and gas discharge tube GDT is integrated; solve in the overvoltage protection of piezo-resistance ZOM the problem easily producing leakage current increase and cause catching fire; and be convenient to the circuit layout of miniature electronic product in the electronic product microminiaturized epoch, and reduce the welding procedure level of components and parts.And the integrated component that the present embodiment provides is relative to single overvoltage protection circuit field, the type selecting of application element thereof is simple, and the production process of electronic product is simple.
And the piezo-resistance that the embodiment of the present application provides, the outer surface of cup-shaped piezo-resistance 130 has electric conducting material to be made, and coated area equals the electrode layer 150 of the exterior surface area of cup-shaped piezo-resistance 130, outer surface due to cup-shaped piezo-resistance 130 is all coated with the electrode layer 150 that electric conducting material makes, then increase the longitudinal section sum cross-sectional area of the electrode of piezo-resistance, determine the high throughflow ability of piezo-resistance, solve the structure formed of piezo-resistance and the contradictory problems of through-current capability demand on technology realizes, overcome the large bottleneck of through-current capability in piezo-resistance technical development process of piezo-resistance.
As the optional execution mode of one, piezo-resistance also comprises:
The electrode layer that the surface-coated of the electrode layer 160 of the surface being positioned at the electrode layer 160 of the madial wall of the second hollow pipe 131 and/or the upper surface being positioned at base plate 132 has electronic emission material to be made.The present embodiment provides original electron by the electronic emission material of coating, and be more conducive to exciting of electronics, wherein electronic emission material can be electronic powder.
As the optional execution mode of one, the madial wall of the second hollow pipe 131 and/or the upper surface of base plate 132 are coated with the electrode layer 160 that electric conducting material is made, and comprising:
The madial wall of the second hollow pipe 131 and/or the upper surface of base plate 132 are directly coated with the electrode layer 160 that electronic emission material is made, namely the electronic emission material in the present embodiment upper surface of the madial wall of the second hollow pipe 131 and/or base plate 132 directly applied is as the public electrode g1 of the piezo-resistance ZOM shown in Fig. 3 and gas discharge tube GDT, with when the gas discharge tube GDT shown in Fig. 3 is in static state, realize the series connection of piezo-resistance ZOM and gas discharge tube GDT.
As the optional execution mode of one, piezo-resistance also comprises:
The sidewall of the second cylinder electrode 140 and/or the lower surface of the second cylinder electrode 140 are coated with the electrode layer that electronic emission material is made, by the surface-coated electronic emission material at the second cylinder electrode 140, original electron can be provided to electrode during gas discharge tube GDT action shown in Fig. 3, be more conducive to exciting of electronics.
As the optional execution mode of one, it is grid electrode layer that the sidewall of the second cylinder electrode 140 and/or the lower surface of the second cylinder electrode 140 are coated with the electrode layer that electronic emission material is made, wherein, grid electrode layer is convenient to the compactness that electronic emission material is effectively connected with the second cylinder electrode 140.
As the optional execution mode of one, piezo-resistance also comprises:
Be connected with the first cylinder electrode 110 coaxial between the upper surface of the first hollow pipe 120 and the lower surface of the first cylinder electrode 110, and for the first sealing layer of sealing-in first cylinder electrode 110 and the first hollow pipe 120; And/or, be connected with the first cylinder electrode 110 coaxial between the lower surface of the first hollow pipe 120 and the upper surface of the second hollow pipe 131, and for the second sealing layer of sealing-in first hollow pipe 120 and the second hollow pipe 131.The present embodiment realizes the closed connection of the lower surface of the first cylinder electrode 110 and the upper surface of the first hollow pipe 120 by the first sealing layer, wherein the first sealing layer can be made by insulating material, or be made by electric conducting material, and the closed connection of the lower surface of the first hollow pipe 120 and the upper surface of the second hollow pipe 131 can be realized by the second sealing layer.
As the optional execution mode of one, second sealing layer can be the second sealing layer of making of insulating material or the second sealing layer of being made of electric conducting material, when the second sealing layer is the second sealing layer of insulating material making, the lateral wall of the second hollow pipe 131 is coated with the electrode layer 150 that electric conducting material is made, and comprising:
The lateral wall of the second hollow pipe 131 is coated with that electric conducting material is made, and coated area equals the electrode layer 150 of the area of the lateral wall of the second hollow pipe 131.
When the second sealing layer is the second sealing layer made by electric conducting material, the lateral wall of the second hollow pipe 131 is coated with the electrode layer 150 that electric conducting material is made, and comprising:
The lateral wall of the second hollow pipe 131 is coated with that electric conducting material is made, and the electrode layer 150 of being separated by with the upper surface of the second hollow pipe 131, and second cylinder electrode 140 outer surface and the inner surface of the second sealing layer be separated by, namely electrode layer 150 is avoided to be electrically connected with second sealing layer with electric conductivity, and then avoid electrode layer 150 to be connected with electrode layer 160 causing two electrodes of the discrete piezo-resistance ZOM shown in Fig. 3 to be connected, and avoid the second cylinder electrode 140 be connected with the inner surface of cup-shaped piezo-resistance 130 by the second sealing layer of conduction and damage the physical characteristic of gas discharge tube.
As the optional execution mode of one, as shown in Figure 2 b, based on the piezo-resistance shown in Fig. 1, in the piezo-resistance that the present embodiment provides, first cylinder electrode 110 and base plate 132 can be square cylinder, first hollow pipe 120 and the second hollow pipe 131 are square hollow, first cylinder electrode 110, base plate 132, the outer wall of the first hollow pipe 120 and the outer wall of the second hollow pipe 131 overlap in the projection of the plane at the central shaft place perpendicular to the first cylinder electrode 110, the inwall of the first hollow pipe 120 and the inwall of the second hollow pipe 131 overlap in the projection of the plane at the central shaft place perpendicular to the first cylinder electrode 110, other structure can refer to the description of the embodiment shown in Fig. 1, specifically do not repeat at this, wherein the first cylinder electrode 110 and base plate 132 are as square cylinder, and first hollow pipe 120 and the second hollow pipe 131 be square hollow, the paster being more conducive to the piezo-resistance of integrated discharge tube is produced, can be processed by paster when making microminiaturized product, the element automation paster being conducive to microminiaturized product is produced, improve the working (machining) efficiency of product.
Refer to Fig. 4 a, the sectional structure chart of a kind of piezo-resistance that Fig. 4 a provides for the embodiment of the present application.As shown in fig. 4 a, the piezo-resistance of the integrated gas discharge tube that the present embodiment provides, from bottom to top comprise base plate 410, first hollow pipe 420 successively and with the first hollow pipe 420, there is the first cylinder electrode 430 of identical central axle, wherein, first cylinder electrode 430, first hollow pipe 420 and base plate 410 sealing-in are combined into the airtight cavity 40 storing inert gas, the lower surface of the outer surface of base plate 410 is provided with the first electrode layer 411 that electric conducting material is made, base plate 410 is made by piezoresistive material, and the first hollow pipe 420 is porcelain tube.In the present embodiment, the edge of the first electrode layer 411 is equal to the distance of central shaft with the edge of base plate 410 to the distance of central shaft, namely the area of the first electrode layer 411 equals the area of the lower surface of base plate 410, and the edge of base plate 410 to the distance of central shaft equals the distance of outer wall to central shaft of the first hollow pipe 420, namely base plate 410 can seal the first hollow pipe 420.In other embodiments, first electrode layer 411 can be arranged on any position of the outer surface of base plate 410, namely arbitrary sidewall or the lower surface of base plate 410 can be arranged on, and the size of the first electrode layer 411 can be arbitrary, concrete first electrode layer 411 realize position and size does not limit by the realization of the present embodiment.
And, first electrode of the first cylinder electrode 430 as gas discharge tube GDT of the piezo-resistance of the integrated gas discharge tube that the present embodiment provides is described with reference to Fig. 3, first electrode layer 411 can be used as an Electrode connection terminal of piezo-resistance ZOM, when gas discharge tube GDT is failure to actuate, piezo-resistance ZOM and gas discharge tube GDT is in off state, when gas discharge tube GDT action, inert gas in airtight cavity 40 can inspire the public electrode g1 of electronics as gas discharge tube GDT and piezo-resistance ZOM, overvoltage protection object is reached to make piezo-resistance ZOM and gas discharge tube GDT series connection.
The piezo-resistance that the present embodiment provides improves traditional piezo-resistance structure, by piezo-resistance structure and gas discharge tube combined serial, and then realizes overvoltage protection object.Wherein, the base plate 410 be made by piezoresistive material, first hollow pipe 420 and the first cylinder electrode 430 are combined into the airtight cavity storing inert gas by sealing-in mode, and the outer surface of base plate 410 is provided with electrode layer, then the first cylinder electrode 430 can be used as an electrode of gas discharge tube, the electrode layer of the outer surface setting of base plate 410 can be used as an electric connection terminal of piezo-resistance, when gas discharge tube effect, inert gas in airtight cavity can inspire the public electrode of electronics as gas discharge tube and piezo-resistance, overvoltage protection object is reached to make piezo-resistance and gas discharge tube series connection, and the overvoltage protection performance solving piezo-resistance is low and the problem of stability, and the circuit layout of miniature electronic product is convenient in the electronic product microminiaturized epoch, and reduce the welding procedure level of the components and parts in miniature electronic, and make the production process of electronic product simple, reduce the process time of electronic product, and then improve the working (machining) efficiency of electronic product.
As the optional execution mode of one, refer to Fig. 4 b, the sectional structure chart of the another kind of piezo-resistance that Fig. 4 b provides for the embodiment of the present application.As shown in Figure 4 b, the upper surface of base plate 410 that the present embodiment provides is provided with that electric conducting material is made and is arranged in the electrode layer 412 of airtight cavity.In other embodiments, the setting position of this electrode layer and area unrestricted.Be described shown in composition graphs 3, electrode layer 412 can directly as the public electrode g1 of gas discharge tube GDT and piezo-resistance ZOM, namely gas discharge gap is formed between the first cylinder electrode 430 and electrode layer 412, to make gas discharge tube GDT and piezo-resistance ZOM be together in series by electrode layer 412.
This electrode layer 412 in present embodiment is as second electrode of gas discharge tube; the public electrode of simultaneously connecting with gas discharge tube as piezo-resistance; make series connection overvoltage protection better effects if; and by the upper surface that is arranged at base plate 410 and the electrode layer being arranged in airtight cavity can provide more original electron, be more conducive to exciting of the electronics of gas discharge tube.
As the optional execution mode of one, the upper surface of electrode layer 412 arranged in base plate 410 upper surface is provided with another electrode layer that electronic emission material is made.In present embodiment, electrode when coating electronic emission material is more conducive to gas discharge tube action provides original electron.
As the optional execution mode of one, refer to Fig. 5, the sectional structure chart of the another kind of piezo-resistance that Fig. 5 provides for the embodiment of the present application.As shown in Figure 5, based on the piezo-resistance shown in Fig. 4 a, the piezo-resistance in the embodiment shown in Fig. 5 also comprises:
With the first cylinder electrode 430 be connected to form one and the second cylinder electrode 510, the second cylinder electrode 510 being arranged in airtight cavity be separated by with the inner surface of airtight cavity 40, to form discharging gap.In present embodiment, the second cylinder electrode 510 is connected with the first cylinder electrode 430, can be used as same electrode, can the overvoltage protection ability of lift gas discharge tube by arranging the second cylinder electrode 510.
As the optional execution mode of one, the sidewall of the second cylinder electrode 510 and/or the lower surface of the second cylinder electrode 510 are coated with the second electrode lay that electronic emission material is made.In present embodiment, electrode when coating electronic emission material is more conducive to gas discharge tube GDT action provides original electron.
Refer to Fig. 6, the sectional structure chart of the another kind of piezo-resistance that Fig. 6 provides for the embodiment of the present application, as shown in Figure 6, based on the piezo-resistance shown in Fig. 5, the piezo-resistance that the present embodiment provides also comprises electrode layer 611, wherein electrode layer 611 is made for electric conducting material, is arranged in airtight cavity 40, and is arranged on the upper surface of base plate 410.In other embodiments, the setting position of this electrode layer 611 and area unrestricted.In present embodiment; this electrode layer 611 can as another electrode of gas discharge tube; the public electrode of simultaneously connecting with gas discharge tube as piezo-resistance; make series connection overvoltage protection better effects if; and more original electron can be provided by third electrode layer, be more conducive to exciting of the electronics of gas discharge tube.
As the optional execution mode of one, the upper surface of electrode layer 611 arranged in base plate 410 upper surface is provided with another electrode layer that electronic emission material is made.In present embodiment, electrode when coating electronic emission material is more conducive to gas discharge tube action provides original electron.
Refer to Fig. 7, Fig. 8 and Fig. 9, the sectional structure chart of the another kind of piezo-resistance that Fig. 7 provides for the embodiment of the present application, the plan structure figure of the another kind of piezo-resistance that Fig. 8 provides for the embodiment of the present application, the side-looking structure chart of the another kind of piezo-resistance that Fig. 9 provides for the embodiment of the present application.As Fig. 7, shown in Fig. 8 and Fig. 9, the piezo-resistance that the present embodiment provides from bottom to top comprises base plate 710 successively, first hollow pipe 720 and there is the first cylinder electrode 730 of identical central axle with the first hollow pipe 720, and as shown in Figure 7, the outer surface of the piezo-resistance that the present embodiment provides also is provided with the encapsulated layer 750 that insulating material is made, and base plate 710 comprise extend to outside the second encapsulated layer 750 and for circuit connect the second electrode leading-out terminal 751, first cylinder electrode 730 comprise extend to outside the second encapsulated layer 750 and for circuit connect the second electrode leading-out terminal 752.First cylinder electrode 730, first hollow pipe 720 and base plate 710 sealing-in are combined into the airtight cavity 70 storing inert gas, the lower surface of the outer surface of base plate 710 is provided with the first electrode layer 711 that electric conducting material is made, first electrode layer 711 can be the metal electrode layer of coating, also can be the electrode layer that other electric conducting materials of coating are made.In the present embodiment, in order to the piezo-resistance of integrated gas discharge tube is better described, the piezo-resistance of the integrated gas discharge tube shown in Fig. 8 and Fig. 9 does not illustrate encapsulated layer, and what illustrate is the structure chart removing encapsulated layer.And, as shown in Figure 7, the piezo-resistance of integrated gas discharge tube also comprise be connected to form one with the first cylinder electrode 730 and be arranged in the second cylinder electrode 740 of airtight cavity 70, base plate 710 is made by piezoresistive material, first hollow pipe 720 is porcelain tube, and second cylinder electrode 740 be separated by with the inner surface of airtight cavity 70, to form discharging gap.In the present embodiment, the edge of base plate 710 to the distance of central shaft is greater than the distance of outer wall to central shaft of the first hollow pipe 720, namely base plate 710 can seal the first hollow pipe 720, and the upper surface of base plate 710 is provided with another electrode layer 712 that electric conducting material is made, first hollow pipe 720 is connected to this another electrode layer 712, to be connected with base plate 710 by this another electrode layer 712, wherein, edge to the distance of central shaft of this another electrode layer 712 is less than the distance of edge to central shaft of base plate 710.And in the present embodiment, the edge of the first electrode layer 711 is equal to the distance of central shaft with the edge of base plate 710 to the distance of central shaft, and namely the area of the first electrode layer 711 equals the area of the lower surface of base plate 710.In other embodiments, first electrode layer 711 can be arranged on any position of the outer surface of base plate, and the size of the first electrode layer 711 can be arbitrary, concrete first electrode layer 711 realize position and size does not limit by the realization of the present embodiment.In the present embodiment, base plate 710 is cylinder, and the first cylinder electrode 730 is cylinder, and the first hollow pipe 720 is annular hollow pipe.In other embodiments, base plate 710 can be square cylinder, and the first cylinder electrode 730 can be square cylinder, and the first hollow pipe 720 can be square hollow.The shape way of realization of concrete base plate 710, first cylinder electrode 730 and the first hollow pipe 720 is not by the restriction of the present embodiment.
As the optional execution mode of one, the sidewall of the second cylinder electrode 740 and/or the lower surface of the second cylinder electrode 740 are coated with the second electrode lay that electronic emission material is made, wherein, the second cylinder electrode 740 is separated by with the inner surface of airtight cavity, to form discharging gap.
The piezo-resistance that the present embodiment provides can realize piezo-resistance and connect with gas discharge tube, and then realizes overvoltage protection object.Wherein, the base plate be made by piezoresistive material, first hollow pipe and the first cylinder electrode are combined into the airtight cavity storing inert gas by sealing-in mode, and the outer surface of base plate is provided with electrode layer, then the first cylinder electrode can be used as an electrode of gas discharge tube, the electrode layer of the outer surface setting of base plate can be used as an electric connection terminal of piezo-resistance, when gas discharge tube effect, inert gas in airtight cavity can inspire the public electrode of electronics as gas discharge tube and piezo-resistance, overvoltage protection object is reached to make piezo-resistance and gas discharge tube series connection, and the overvoltage protection performance solving piezo-resistance is low and the problem of stability, and the circuit layout of miniature electronic product is convenient in the electronic product microminiaturized epoch, and reduce the welding procedure level of the components and parts in miniature electronic, and make the production process of electronic product simple, reduce the process time of electronic product, and then improve the working (machining) efficiency of electronic product.
The present embodiment also provides a kind of piezo-resistance of integrated gas discharge tube, from bottom to top comprise base plate, the first hollow pipe successively and with the first hollow pipe, there is the first cylinder electrode of identical central axle, wherein, first cylinder electrode, the first hollow pipe and base plate sealing-in are combined into the airtight cavity storing inert gas, the lower surface of the outer surface of base plate is provided with the first electrode layer that electric conducting material is made, base plate is made by piezoresistive material, and the first hollow pipe is porcelain tube.In other embodiments, first electrode layer can be arranged on any position of the outer surface of base plate, namely arbitrary sidewall or the lower surface of base plate can be arranged on, and the size of the first electrode layer can be arbitrary, concrete first electrode layer realize position and size does not limit by the realization of the present embodiment.And, the edge of the base plate in the present embodiment to the distance of central shaft is greater than the distance of outer wall to central shaft of the first hollow pipe, namely base plate can sealing-in first hollow pipe, and the upper surface of base plate is provided with another electrode layer that electric conducting material is made, first hollow pipe is connected to this another electrode layer, to be connected with base plate by this another electrode layer, wherein, edge to the distance of central shaft of this another electrode layer is less than the distance of edge to central shaft of base plate.And in the present embodiment, the edge of the first electrode layer is equal to the distance of central shaft with the edge of base plate to the distance of central shaft, and namely the area of the first electrode layer equals the area of the lower surface of base plate.
As the optional execution mode of one, piezo-resistance also comprises:
The upper surface of another electrode layer and the lower surface at the position and/or the first cylinder electrode that are arranged in airtight cavity is coated with the electrode layer that electronic emission material is made.
On the other hand, the present embodiment additionally provides a kind of piezo-resistance, comprise as shown in fig. 4 a two piezo-resistances be oppositely arranged, first cylinder Electrode connection of two piezo-resistances together, piezo-resistance also comprises, first cylinder electrode of two piezo-resistances is provided with through hole corresponding up and down, forms to make two piezo-resistances the airtight cavity storing inert gas; And, two third electrodes with the first cylinder electrode separation are provided with in airtight cavity, first cylinder electrode and two third electrodes form discharging gap each other, with realized by the present embodiment two piezo-resistances respectively with the cascaded structure of gas discharge tube, solve the potential safety hazard of the leakage current increase that existing piezo-resistance causes due to physical characteristic own, under normal working voltage, gas discharge tube is in open-circuit condition completely, can block the leakage current of piezo-resistance, after thunderbolt, piezo-resistance can cut off again the afterflow of gas discharge tube.And, in the piezo-resistance that the present embodiment provides, the base plate that cup-shaped piezo-resistance or piezoresistive material are made is that body punctures heating inefficacy, and gas discharge tube failure is open circuit air leakage failure, so when piezo-resistance lost efficacy due to thunderbolt or over-voltage breakdown, gas discharge tube punctures gas leakage, open failure due to pressure-sensitive, thus stops the persistent fever burning of piezo-resistance.
To sum up describe, the piezo-resistance integrated gas discharge tube that the embodiment of the present application provides, by the piezoresistive element of traditional discrete and gas discharge tube series connection, solve the potential safety hazard that existing piezo-resistance causes in use leakage current increase to cause catching fire to lose efficacy due to physical characteristic own, solve the circuit layout of the discrete element application such as piezo-resistance when the miniaturized electronic product further by structural innovation more difficult simultaneously, the problem that welding procedure level requirement is high, and overcome the large bottleneck of through-current capability in piezo-resistance technical development process of piezo-resistance.
In several embodiments that the application provides; should be understood that above description; be only the specific embodiment of the present invention; but protection scope of the present invention is not limited thereto; anyly be familiar with those skilled in the art in the technical scope that the present invention discloses; can expect amendment or the replacement of various equivalence easily, these amendments or replacement all should be encompassed within protection scope of the present invention.

Claims (15)

1. the piezo-resistance of an integrated gas discharge tube, it is characterized in that, from bottom to top comprise base plate, the first hollow pipe successively and with described first hollow pipe, there is the first cylinder electrode of identical central axle, described first cylinder electrode, described first hollow pipe and described base plate sealing-in are combined into the airtight cavity storing inert gas, the outer surface of described base plate is provided with the first electrode layer that electric conducting material is made, described base plate is made by piezoresistive material, and described first hollow pipe is porcelain tube.
2. the piezo-resistance of integrated gas discharge tube as claimed in claim 1, is characterized in that, the outer surface of described base plate is provided with the first electrode layer that electric conducting material is made, and comprising:
The lower surface of the outer surface of described base plate is provided with described first electrode layer that described electric conducting material is made.
3. the piezo-resistance of integrated gas discharge tube as claimed in claim 2, it is characterized in that, the piezo-resistance of described integrated gas discharge tube also comprises:
Be arranged in the second cylinder electrode of described airtight cavity with described first cylinder Electrode connection shape all-in-one-piece, the inner surface of described second cylinder electrode and described airtight cavity is separated by, to form discharging gap; Or,
Described piezo-resistance also comprises:
The second cylinder electrode of described airtight cavity is arranged in described first cylinder Electrode connection shape all-in-one-piece, and the lower surface of the sidewall of described second cylinder electrode and/or described second cylinder electrode is coated with the second electrode lay that electronic emission material is made, wherein, the inner surface of described second cylinder electrode and described airtight cavity is separated by, to form discharging gap.
4. the piezo-resistance of the integrated gas discharge tube as described in claim 1 or 2 or 3, is characterized in that, the edge of described base plate to the distance of described central shaft equals the distance of outer wall to described central shaft of described first hollow pipe; And,
The upper surface of described base plate is provided with that electric conducting material is made and is arranged in the third electrode layer of described airtight cavity; Or,
The upper surface of described base plate is provided with that electric conducting material is made and is arranged in the third electrode layer of described airtight cavity, and the surface of described third electrode layer that arranges, the upper surface of described base plate is provided with the 4th electrode layer that electronic emission material is made.
5. the piezo-resistance of integrated gas discharge tube as claimed in claim 4, it is characterized in that, the piezo-resistance of described integrated gas discharge tube also comprises:
The second hollow pipe be integrated with described base plate is connected with between described base plate and described first hollow pipe, wherein, described second hollow pipe and described base plate form the cup-shaped piezo-resistance that longitudinal section is spill, the upper surface of described second hollow pipe is connected to the lower surface of described first hollow pipe, and the upper surface of described first hollow pipe is connected to the lower surface of described first cylinder electrode, described first cylinder electrode, described first hollow pipe and described cup-shaped piezo-resistance sealing-in composition store the described airtight cavity of inert gas, inner surface and the described first cylinder electrode separation of described cup-shaped piezo-resistance form discharging gap, wherein, described cup-shaped piezo-resistance is made by piezoresistive material.
6. the piezo-resistance of integrated gas discharge tube as claimed in claim 5, it is characterized in that, the piezo-resistance of described integrated gas discharge tube also comprises:
The lateral wall of described second hollow pipe is provided with the 5th electrode layer that electric conducting material is made, and the outer surface of described 5th electrode layer and/or described first electrode layer is provided with the first encapsulated layer that insulating material is made; And/or,
The madial wall of described second hollow pipe is provided with the 6th electrode layer that electric conducting material is made.
7. the piezo-resistance of integrated gas discharge tube as claimed in claim 6, is characterized in that,
The piezo-resistance of described integrated gas discharge tube also comprises:
The surface of described 6th electrode layer that the madial wall being positioned at described second hollow pipe is arranged is provided with the 7th electrode layer that electronic emission material is made.
8. the piezo-resistance of integrated gas discharge tube as claimed in claim 7, it is characterized in that, described cup-shaped piezo-resistance and/or described base plate and/or described first cylinder electrode comprise respectively extend laterally and the first electrode leading-out terminal connected for circuit; And,
The piezo-resistance of described integrated gas discharge tube also comprises:
Be connected with described first cylinder electrode coaxial between the upper surface of described first hollow pipe and the lower surface of described first cylinder electrode, and for the first sealing layer of the first cylinder electrode and described first hollow pipe described in sealing-in; And/or,
Be connected with described first cylinder electrode coaxial between the lower surface of described first hollow pipe and the upper surface of described second hollow pipe, and for the second sealing layer of the first hollow pipe described in sealing-in and described second hollow pipe.
9. the piezo-resistance of integrated gas discharge tube as claimed in claim 8, it is characterized in that, described second sealing layer is described second sealing layer made by insulating material, and the lateral wall of described second hollow pipe is provided with the 5th electrode layer that electric conducting material is made, and comprising:
The lateral wall of described second hollow pipe is provided with that electric conducting material is made, and coated area equals described 5th electrode layer of the area of the lateral wall of described second hollow pipe.
10. the piezo-resistance of integrated gas discharge tube as claimed in claim 8, it is characterized in that, described second sealing layer is described second sealing layer made by electric conducting material, and the lateral wall of described second hollow pipe is provided with the 5th electrode layer that electric conducting material is made, and comprising:
The lateral wall of described second hollow pipe is provided with that electric conducting material is made, and described 5th electrode layer of being separated by with the upper surface of described second hollow pipe.
The piezo-resistance of 11. integrated gas discharge tubes as claimed in claim 9, it is characterized in that, described first cylinder electrode and described base plate are cylinder, described first hollow pipe and described second hollow pipe are annular, the diameter of described first cylinder electrode, the diameter of described base plate, the external diameter of described first hollow pipe is identical with the external diameter of described second hollow pipe, and the internal diameter of described first hollow pipe is identical with the internal diameter of described second hollow pipe.
The piezo-resistance of 12. integrated gas discharge tubes as claimed in claim 10, it is characterized in that, described first cylinder electrode and described base plate are square cylinder, described first hollow pipe and described second hollow pipe are square hollow, described first cylinder electrode, described base plate, the outer wall of described first hollow pipe and the outer wall of described second hollow pipe overlap in the projection of the plane at the central shaft place perpendicular to described first cylinder electrode, the inwall of described first hollow pipe and the inwall of described second hollow pipe overlap in the projection of the plane at the described central shaft place perpendicular to described first cylinder electrode.
The piezo-resistance of 13. integrated gas discharge tubes as described in claim 1 or 2 or 3, it is characterized in that, the edge of described base plate to the distance of described central shaft is greater than the distance of outer wall to described central shaft of described first hollow pipe, the upper surface of described base plate is provided with the 8th electrode layer that electric conducting material is made, described first hollow pipe is connected with described base plate by described 8th electrode layer, the distance of the edge that the distance of the edge of described 8th electrode layer extremely described central shaft is less than described base plate extremely described central shaft.
The piezo-resistance of 14. integrated gas discharge tubes as claimed in claim 13, it is characterized in that, described base plate is cylinder or square cylinder, the outer surface of the piezo-resistance of described integrated gas discharge tube is provided with the second encapsulated layer that insulating material is made, and described base plate comprises respectively with described first cylinder electrode and extends to the second electrode leading-out terminal that is outside described second encapsulated layer and that be connected for circuit; And,
Described first cylinder electrode is cylinder, and described first hollow pipe is annular hollow pipe; Or,
Described first cylinder electrode is square cylinder, and described first hollow pipe is square hollow.
The piezo-resistance of 15. 1 kinds of integrated gas discharge tubes, is characterized in that, comprises the piezo-resistance of two the integrated gas discharge tubes as claimed in claim 1 be oppositely arranged, the described first cylinder Electrode connection of the piezo-resistance of described two integrated gas discharge tubes;
Also comprise:
The described first cylinder electrode of the piezo-resistance of described two integrated gas discharge tubes is provided with through hole corresponding up and down, and be provided with in described airtight cavity and form two third electrodes of discharging gap with described first cylinder electrode respectively, mutually separate between described first cylinder electrode and described two third electrodes.
CN201410118192.6A 2014-03-27 2014-03-27 Piezoresistor of integrated gas discharge tube Pending CN104952570A (en)

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CN109564806A (en) * 2016-07-19 2019-04-02 Tdk电子股份有限公司 Utilize device and its application of two rheostats and discharger defence overvoltage in single component
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CN107342145A (en) * 2017-07-10 2017-11-10 隆科电子(惠阳)有限公司 A kind of compound MOV for inserting GDT
CN109950013B (en) * 2017-12-20 2021-02-09 成都铁达电子股份有限公司 Ceramic chip and piezoresistor
CN109950013A (en) * 2017-12-20 2019-06-28 成都铁达电子股份有限公司 A kind of ceramic chip and piezoresistor
CN110400665A (en) * 2018-04-24 2019-11-01 成都铁达电子股份有限公司 A kind of low natural capacity piezoresistor of chip type
CN110400667B (en) * 2018-04-24 2021-07-13 成都铁达电子股份有限公司 Low-inherent-capacitance piezoresistor
CN110400665B (en) * 2018-04-24 2021-09-28 成都铁达电子股份有限公司 Chip type low inherent capacitance piezoresistor
CN110400667A (en) * 2018-04-24 2019-11-01 成都铁达电子股份有限公司 A kind of low natural capacity piezoresistor
CN110556220A (en) * 2018-06-04 2019-12-10 成都铁达电子股份有限公司 Ceramic chip and low-limiting-voltage piezoresistor
CN110556220B (en) * 2018-06-04 2022-08-26 成都铁达电子股份有限公司 Ceramic chip and low-limiting-voltage piezoresistor

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Application publication date: 20150930