CN114141459A - Over-temperature protection method and structure of nano-alloy electrode piezoresistor - Google Patents
Over-temperature protection method and structure of nano-alloy electrode piezoresistor Download PDFInfo
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- CN114141459A CN114141459A CN202111605110.7A CN202111605110A CN114141459A CN 114141459 A CN114141459 A CN 114141459A CN 202111605110 A CN202111605110 A CN 202111605110A CN 114141459 A CN114141459 A CN 114141459A
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- piezoresistor
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- fuse
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- 238000000034 method Methods 0.000 title claims abstract description 19
- 239000000956 alloy Substances 0.000 title claims abstract description 17
- 229910045601 alloy Inorganic materials 0.000 title claims abstract description 17
- XLOMVQKBTHCTTD-UHFFFAOYSA-N Zinc monoxide Chemical compound [Zn]=O XLOMVQKBTHCTTD-UHFFFAOYSA-N 0.000 claims abstract description 74
- 239000011787 zinc oxide Substances 0.000 claims abstract description 37
- 238000004806 packaging method and process Methods 0.000 claims abstract description 6
- 238000004026 adhesive bonding Methods 0.000 claims abstract description 5
- 238000005516 engineering process Methods 0.000 claims description 10
- 238000001755 magnetron sputter deposition Methods 0.000 claims description 9
- 238000005476 soldering Methods 0.000 claims description 5
- 239000002120 nanofilm Substances 0.000 claims description 3
- 238000003466 welding Methods 0.000 abstract description 15
- BQCADISMDOOEFD-UHFFFAOYSA-N Silver Chemical compound [Ag] BQCADISMDOOEFD-UHFFFAOYSA-N 0.000 abstract description 6
- 229910052709 silver Inorganic materials 0.000 abstract description 6
- 239000004332 silver Substances 0.000 abstract description 6
- 238000004519 manufacturing process Methods 0.000 abstract description 5
- 239000000919 ceramic Substances 0.000 abstract description 2
- 238000003754 machining Methods 0.000 abstract description 2
- 239000004065 semiconductor Substances 0.000 abstract description 2
- 238000010586 diagram Methods 0.000 description 3
- 238000004544 sputter deposition Methods 0.000 description 3
- 206010000369 Accident Diseases 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 239000002159 nanocrystal Substances 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000011248 coating agent Substances 0.000 description 1
- 238000000576 coating method Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000001419 dependent effect Effects 0.000 description 1
- 238000005538 encapsulation Methods 0.000 description 1
- 239000011159 matrix material Substances 0.000 description 1
Images
Classifications
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01C—RESISTORS
- H01C7/00—Non-adjustable resistors formed as one or more layers or coatings; Non-adjustable resistors made from powdered conducting material or powdered semi-conducting material with or without insulating material
- H01C7/10—Non-adjustable resistors formed as one or more layers or coatings; Non-adjustable resistors made from powdered conducting material or powdered semi-conducting material with or without insulating material voltage responsive, i.e. varistors
- H01C7/12—Overvoltage protection resistors
- H01C7/126—Means for protecting against excessive pressure or for disconnecting in case of failure
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01C—RESISTORS
- H01C1/00—Details
- H01C1/14—Terminals or tapping points or electrodes specially adapted for resistors; Arrangements of terminals or tapping points or electrodes on resistors
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01C—RESISTORS
- H01C1/00—Details
- H01C1/16—Resistor networks not otherwise provided for
Abstract
The invention provides an over-temperature protection method and a structure of a nano-alloy electrode piezoresistor, belonging to the technical field of semiconductor ceramics and comprising a zinc oxide piezoresistor; the upper surface of the zinc oxide piezoresistor is connected with an over-temperature protection temperature controller through gluing; the over-temperature protection temperature controller comprises a square temperature fuse; the packaging layer wraps the zinc oxide piezoresistor and the over-temperature protection temperature controller; when the piezoresistor is subjected to overvoltage or overtemperature in the using process, the circuit is automatically cut off, the piezoresistor and the circuit are protected, and the piezoresistor has the advantages of simple production process, good consistency and high reliability; the problems that the silver electrode is adopted as a welding surface of the piezoresistor with temperature protection, and then the fuse is welded on the silver electrode, the welding temperature is extremely difficult to control in the machining process, the electrode surface is easy to corrode, poor welding is caused, the reliability of a product is low, and the yield of the product is low are solved.
Description
Technical Field
The invention belongs to the technical field of semiconductor ceramics, and particularly relates to an over-temperature protection method and structure of a nano-alloy electrode piezoresistor.
Background
The piezoresistor is a commonly used element in a general electronic circuit, plays a role in protecting against lightning and overvoltage in the circuit, is a resistor device with nonlinear volt-ampere characteristics, is mainly used for clamping voltage when the circuit bears overvoltage and absorbing redundant current to protect sensitive devices, utilizes the nonlinear characteristics of the piezoresistor, when the overvoltage appears between two poles of the piezoresistor, the piezoresistor can clamp the voltage to a relatively fixed voltage value so as to realize the protection of a later-stage circuit, the piezoresistor can generate heat after the overvoltage exceeds a limit voltage and lightning current, so that a coating burns and fires, a great potential safety hazard exists, the piezoresistor is connected with a temperature controller in series or in parallel, the temperature controller automatically fuses after the fusing temperature of the temperature controller is exceeded, the circuit is automatically cut off or a signal is fed back to a control part to cut off the circuit, preventing fire accidents.
Based on the above, it can be seen that, similar to the existing varistor with temperature protection, the silver electrode is used as the welding surface, and then the fuse is welded to the silver electrode, because the welding temperature in the machining process is very difficult to control, the electrode surface is easily corroded to cause poor welding, the product reliability is low, and the product yield is low.
Therefore, in view of the above, research and improvement are made for the existing structure and defects, and a nano alloy electrode varistor with temperature protection is provided, so as to achieve the purpose of higher practical value.
Disclosure of Invention
In order to solve the technical problems, the invention provides an over-temperature protection method and a structure of a nano alloy electrode piezoresistor, which are used for solving the problems that as the silver electrode is adopted as a welding surface of the existing piezoresistor with temperature protection, and then a fuse is welded on the silver electrode, the welding temperature is extremely difficult to control in the processing process, the electrode surface is easy to corrode, the welding is poor, the product reliability is low, and the product yield is low.
The invention relates to a purpose and an effect of a nano alloy electrode piezoresistor with temperature protection, which are achieved by the following specific technical means:
the over-temperature protection method of the nano alloy electrode piezoresistor adopts a vacuum magnetron sputtering technology on the surface of a zinc oxide base to form a nano crystal film electrode, adopts a fuse box type for over-temperature protection, and is connected with a zinc oxide piezoresistor in series through a temperature fuse, when the zinc oxide piezoresistor is in overvoltage or over-temperature in the using process, the temperature fuse is automatically cut off to cut off a circuit, thereby protecting elements in the circuit from being damaged or burning, and playing a role of protecting the piezoresistor and the circuit.
A nanometer alloy electrode piezoresistor with temperature protection comprises a zinc oxide piezoresistor; the upper surface of the zinc oxide piezoresistor is connected with an over-temperature protection temperature controller through gluing; the over-temperature protection temperature controller comprises a square temperature fuse; and the packaging layer wraps the zinc oxide piezoresistor and the over-temperature protection temperature controller.
Furthermore, the over-temperature protection temperature controller comprises a square temperature fuse, and the protection temperature of the square temperature fuse is any temperature between one hundred and two hundred and fifty degrees.
Furthermore, the zinc oxide piezoresistor is provided with a piezoresistor input electrode and a piezoresistor output electrode, and the piezoresistor input electrode and the piezoresistor output electrode adopt nano film electrodes formed by a vacuum magnetron sputtering technology.
Furthermore, the overvoltage range of the zinc oxide piezoresistor is more than 1.2 times of the maximum working alternating voltage of the piezoresistor.
Furthermore, the square temperature fuse comprises a fuse input electrode and a fuse output electrode, the fuse input electrode is the input end of the piezoresistor, and the fuse output electrode is connected with the piezoresistor input electrode in a soldering mode.
Compared with the prior art, the invention has the following beneficial effects:
the invention adds the functions on the prior piezoresistor, which is mainly represented by the following steps: the surface of the zinc oxide base adopts a vacuum magnetron sputtering technology to form a nanocrystalline film electrode, a piezoresistor adopting the magnetron vacuum sputtering electrode is not easy to corrode the electrode during welding, the welding process is good, the manufacturing is easy, the product cost is reduced, the magnetron vacuum sputtering technology electrode is adopted, an over-temperature protection adopts a fuse box type to facilitate welding, the square temperature fuse is connected with the zinc oxide piezoresistor in series, under the condition that the zinc oxide piezoresistor meets overvoltage or over-temperature in the using process, the square temperature fuse is automatically cut off, the circuit is automatically cut off, elements in the circuit are protected from being damaged or burnt, the piezoresistor with the protection function and the circuit function are played, the fire accident caused by fire is prevented, the production process is simple, the consistency is good, and the reliability is high.
Drawings
Fig. 1 is a schematic structural view of the present invention.
Fig. 2 is a schematic diagram of the packaged structure of the present invention.
FIG. 3 is a schematic diagram of the circuit connection structure of the present invention.
Fig. 4 is a schematic structural view of the present invention with three leads.
FIG. 5 is a schematic diagram of the structure of the present invention with four leads.
In the drawings, the corresponding relationship between the component names and the reference numbers is as follows:
1. a zinc oxide varistor; 101. a varistor input electrode; 102. a varistor output electrode; 2. a square temperature fuse; 201. a fuse input electrode; 202. a fuse output electrode; 3. and (7) packaging the layer.
Detailed Description
The embodiments of the present invention will be described in further detail with reference to the drawings and examples. The following examples are intended to illustrate the invention but are not intended to limit the scope of the invention.
In the description of the present invention, "a plurality" means two or more unless otherwise specified; the terms "upper", "lower", "left", "right", "inner", "outer", "front", "rear", "head", "tail", and the like, indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, are only for convenience in describing and simplifying the description, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed in a particular orientation, and be operated, and thus, should not be construed as limiting the invention. Furthermore, the terms "first," "second," "third," and the like are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.
In the description of the present invention, it is to be noted that, unless otherwise explicitly specified or limited, the terms "connected" and "connected" are to be interpreted broadly, e.g., as being fixed or detachable or integrally connected; can be mechanically or electrically connected; may be directly connected or indirectly connected through an intermediate. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.
The first embodiment is as follows:
as shown in figures 1 to 3:
the over-temperature protection method of the nano alloy electrode piezoresistor adopts a vacuum magnetron sputtering technology on the surface of a zinc oxide base to form a nano crystal film electrode, adopts a fuse box type for over-temperature protection, and is connected with a zinc oxide piezoresistor in series through a temperature fuse, when the zinc oxide piezoresistor is in overvoltage or over-temperature in the using process, the temperature fuse is automatically cut off to cut off a circuit, thereby protecting elements in the circuit from being damaged or burning, and playing a role of protecting the piezoresistor and the circuit.
The invention provides a nano alloy electrode piezoresistor with temperature protection, which comprises a zinc oxide piezoresistor 1, wherein an over-temperature protection temperature controller comprises a square temperature fuse 2, the protection temperature of the square temperature fuse 2 is any temperature between one hundred and two hundred fifty degrees, the square temperature fuse 2 can be automatically cut off when the protection temperature exceeds a set temperature and overvoltage or over-temperature exists; the upper surface of the zinc oxide piezoresistor 1 is connected with an over-temperature protection temperature controller through gluing; the over-temperature protection temperature controller comprises a square temperature fuse 2; and the packaging layer 3 is used for packaging the zinc oxide piezoresistor 1 and the over-temperature protection temperature controller.
The zinc oxide piezoresistor 1 is provided with a piezoresistor input electrode 101 and a piezoresistor output electrode 102, the piezoresistor input electrode 101 and the piezoresistor output electrode 102 adopt a nano film electrode formed by a vacuum magnetron sputtering technology, the zinc oxide piezoresistor 1 with the structure is shown in figure 1, the overvoltage range of the zinc oxide piezoresistor 1 is more than 1.2 times of the maximum working alternating current voltage of the piezoresistor, the zinc oxide piezoresistor 1 with the structure is shown in figure 1, the vacuum magnetron sputtering technology is adopted on the surface of the zinc oxide matrix to form a nanocrystalline film electrode, the piezoresistor adopting the magnetron vacuum sputtering electrode is not easy to corrode the electrode during welding, the welding process is good, the manufacturing is easy, the product cost is reduced, the vacuum magnetron sputtering technology electrode is adopted, and the over-temperature protection adopts a fuse box type to facilitate welding.
The square temperature fuse 2 comprises a fuse input electrode 201 and a fuse output electrode 202, the fuse input electrode 201 is an input end of a piezoresistor, the fuse output electrode 202 is connected with the piezoresistor input electrode 101 in a soldering mode, the square temperature fuse 2 with the structure is connected with a zinc oxide piezoresistor 1 in series through the square temperature fuse 2 as shown in figure 3, under the condition that the zinc oxide piezoresistor 1 encounters overvoltage or over-temperature in the using process, the square temperature fuse 2 is automatically cut off, the circuit is automatically cut off, elements in the circuit are protected from being damaged or burning, the effects of the piezoresistor and the circuit are achieved, and the production process is simple, good in consistency and high in reliability.
Example two:
as shown in fig. 4, on the basis of the first embodiment, an electrode pin terminal may be additionally disposed at the positions of the varistor input electrode 101 and the fuse output electrode 202, and the function may be the same as that of 3 pins according to the actual application requirement.
Example three:
as shown in fig. 5, on the basis of the first and second embodiments, two electrode pin terminals may be additionally disposed at the positions of the input electrode 101 of the voltage dependent resistor and the output electrode 202 of the fuse, and the functions may be the same as that of 4 pins according to the actual application requirements.
The specific use mode and function of the embodiment are as follows:
in the invention, firstly, a square temperature fuse 2 is fixed on a zinc oxide piezoresistor 1 through gluing connection, a fuse output electrode 202 is connected with a piezoresistor input electrode 101 through soldering, and finally, a pressure-sensitive resistor formed after an encapsulation layer 3 is arranged is connected into a circuit through an electronic assembly mode of soldering, and in the use process of the pressure-sensitive resistor, under the condition of overvoltage or overtemperature, the square temperature fuse 2 is automatically cut off, so that the circuit is automatically cut off, elements in the circuit are protected from being damaged or burning, and the functions of protecting the piezoresistor and the circuit are achieved.
The embodiments of the present invention have been presented for purposes of illustration and description, and are not intended to be exhaustive or limited to the invention in the form disclosed. Many modifications and variations will be apparent to those of ordinary skill in the art. The embodiment was chosen and described in order to best explain the principles of the invention and the practical application, and to enable others of ordinary skill in the art to understand the invention for various embodiments with various modifications as are suited to the particular use contemplated.
Claims (6)
1. An over-temperature protection method of a nano alloy electrode piezoresistor is characterized by comprising the following steps: a nanocrystalline film electrode is formed on the surface of a zinc oxide base by adopting a vacuum magnetron sputtering technology, a fuse box type is adopted for over-temperature protection, and the temperature fuse is connected with a zinc oxide piezoresistor in series, so that when overvoltage or over-temperature occurs in the use process of the zinc oxide piezoresistor, the temperature fuse is automatically cut off, a circuit is cut off, elements in the circuit are protected from being damaged or burnt, and the functions of protecting the piezoresistor and the circuit are achieved.
2. A nano-alloy electrode varistor with temperature protection implementing the method of claim 1, characterized in that: comprises a zinc oxide varistor (1); the upper surface of the zinc oxide piezoresistor (1) is connected with an over-temperature protection temperature controller through gluing; the over-temperature protection temperature controller comprises a square temperature fuse (2); and the packaging layer (3) wraps the zinc oxide piezoresistor (1) and the over-temperature protection temperature controller.
3. The nano-alloy electrode piezoresistor with temperature protection as claimed in claim 2, wherein: the over-temperature protection temperature controller comprises a square temperature fuse (2), and the protection temperature of the square temperature fuse (2) is any temperature between one hundred and two hundred and fifty degrees.
4. The nano-alloy electrode piezoresistor with temperature protection as claimed in claim 2, wherein: the zinc oxide piezoresistor (1) is provided with a piezoresistor input electrode (101) and a piezoresistor output electrode (102), and the piezoresistor input electrode (101) and the piezoresistor output electrode (102) adopt nano film electrodes formed by a vacuum magnetron sputtering technology.
5. The nano-alloy electrode piezoresistor with temperature protection as claimed in claim 4, wherein: the overvoltage range of the zinc oxide piezoresistor (1) is more than 1.2 times of the maximum working alternating voltage of the piezoresistor.
6. The nano-alloy electrode piezoresistor with temperature protection as claimed in claim 3 or 4, wherein: the square temperature fuse (2) comprises a fuse input electrode (201) and a fuse output electrode (202), the fuse input electrode (201) is an input end of the piezoresistor, and the fuse output electrode (202) is connected with the piezoresistor input electrode (101) in a soldering mode.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111605110.7A CN114141459A (en) | 2021-12-25 | 2021-12-25 | Over-temperature protection method and structure of nano-alloy electrode piezoresistor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111605110.7A CN114141459A (en) | 2021-12-25 | 2021-12-25 | Over-temperature protection method and structure of nano-alloy electrode piezoresistor |
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| CN114141459A true CN114141459A (en) | 2022-03-04 |
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| CN202111605110.7A Pending CN114141459A (en) | 2021-12-25 | 2021-12-25 | Over-temperature protection method and structure of nano-alloy electrode piezoresistor |
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Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN202534451U (en) * | 2012-04-11 | 2012-11-14 | 舜全电气器材(东莞)有限公司 | Novel flame-proof piezoresistor |
| CN105895284A (en) * | 2016-06-12 | 2016-08-24 | 兴勤（常州）电子有限公司 | Thermal protection-type varistor |
| CN209625950U (en) * | 2019-04-09 | 2019-11-12 | 汕头保税区松田电子科技有限公司 | Overheat overvoltage protection piezoresistor |
| CN112289532A (en) * | 2020-09-23 | 2021-01-29 | 贵州凯里经济开发区中昊电子有限公司 | Method for preparing nanocrystalline film electrode by using copper alloy as material and application |
| CN216871687U (en) * | 2021-12-25 | 2022-07-01 | 贵州凯里经济开发区中昊电子有限公司 | Nanometer alloy electrode piezoresistor with temperature protection |
-
2021
- 2021-12-25 CN CN202111605110.7A patent/CN114141459A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN202534451U (en) * | 2012-04-11 | 2012-11-14 | 舜全电气器材(东莞)有限公司 | Novel flame-proof piezoresistor |
| CN105895284A (en) * | 2016-06-12 | 2016-08-24 | 兴勤（常州）电子有限公司 | Thermal protection-type varistor |
| CN209625950U (en) * | 2019-04-09 | 2019-11-12 | 汕头保税区松田电子科技有限公司 | Overheat overvoltage protection piezoresistor |
| CN112289532A (en) * | 2020-09-23 | 2021-01-29 | 贵州凯里经济开发区中昊电子有限公司 | Method for preparing nanocrystalline film electrode by using copper alloy as material and application |
| CN216871687U (en) * | 2021-12-25 | 2022-07-01 | 贵州凯里经济开发区中昊电子有限公司 | Nanometer alloy electrode piezoresistor with temperature protection |
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