CN201570468U - Resistive fuse device - Google Patents
Resistive fuse device Download PDFInfo
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- CN201570468U CN201570468U CN2009201330836U CN200920133083U CN201570468U CN 201570468 U CN201570468 U CN 201570468U CN 2009201330836 U CN2009201330836 U CN 2009201330836U CN 200920133083 U CN200920133083 U CN 200920133083U CN 201570468 U CN201570468 U CN 201570468U
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- PNEYBMLMFCGWSK-UHFFFAOYSA-N Alumina Chemical compound [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 claims description 6
- 239000012774 insulation material Substances 0.000 claims description 5
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- PXHVJJICTQNCMI-UHFFFAOYSA-N Nickel Chemical compound [Ni] PXHVJJICTQNCMI-UHFFFAOYSA-N 0.000 claims description 4
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims description 4
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- FRWYFWZENXDZMU-UHFFFAOYSA-N 2-iodoquinoline Chemical compound C1=CC=CC2=NC(I)=CC=C21 FRWYFWZENXDZMU-UHFFFAOYSA-N 0.000 claims description 2
- 229910017083 AlN Inorganic materials 0.000 claims description 2
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- PWHULOQIROXLJO-UHFFFAOYSA-N Manganese Chemical compound [Mn] PWHULOQIROXLJO-UHFFFAOYSA-N 0.000 claims description 2
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- LTPBRCUWZOMYOC-UHFFFAOYSA-N beryllium oxide Inorganic materials O=[Be] LTPBRCUWZOMYOC-UHFFFAOYSA-N 0.000 claims description 2
- 229910052797 bismuth Inorganic materials 0.000 claims description 2
- JCXGWMGPZLAOME-UHFFFAOYSA-N bismuth atom Chemical compound [Bi] JCXGWMGPZLAOME-UHFFFAOYSA-N 0.000 claims description 2
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- APFVFJFRJDLVQX-UHFFFAOYSA-N indium atom Chemical compound [In] APFVFJFRJDLVQX-UHFFFAOYSA-N 0.000 claims description 2
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- 229910052759 nickel Inorganic materials 0.000 claims description 2
- 229920002647 polyamide Polymers 0.000 claims description 2
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- 229920000647 polyepoxide Polymers 0.000 claims description 2
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- 229910010271 silicon carbide Inorganic materials 0.000 claims description 2
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- RSWGJHLUYNHPMX-UHFFFAOYSA-N Abietic-Saeure Natural products C12CCC(C(C)C)=CC2=CCC2C1(C)CCCC2(C)C(O)=O RSWGJHLUYNHPMX-UHFFFAOYSA-N 0.000 description 1
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Abstract
The utility model relates to a resistive fuse device which effectively reduces the resistance error of a heating resistor body. The device structurally comprises a fuse, a fuse fixing substrate, two heating resistance electrodes, two fuse electrodes, three pin, heating resistors and a fuse layer; each heating resistor is provided with a first protection layer, the surface of the heating resistor and the surface of the first protection layer are provided with cuts, and the surface of the first protection layer is provided with a second protection layer to fully cover the cut; and the fuse layer is arranged on the substrate, is connected with all the fuse electrodes, and is connected with one heating resistor. The resistive fuse device is convenient for structural formation, and the heating resistance layer has low-resistance temperature coefficient, can reduce the resistance error caused by temperature rise, and keep the resistance precision.
Description
Technical field
The utility model relates to a kind of resistance-type fuse unit, relates in particular to a kind of resistance value that can accurately control heating resistor line layer in this resistance-type fuse unit, and is difficult for producing the resistance-type fuse unit of error.
Background technology
As everyone knows, just overcurrent can be prevented, also superpotential protection component can be prevented, the synthetic protection component of lamination heater and low-melting-point metal body on substrate, heater can be switched on when unusual.The heater heating separates low-melting metallic object fusion.The low-melting-point metal body of fusion has the electrode surface of low-melting-point metal body to have good adherence for mounting, can be pulled on the electrode.Because the fusing of low-melting-point metal body causes failure of current.
Referring to Fig. 1; be a kind of structural representation of resistance-type fuse unit commonly used, be provided with mainly in the protection component 1 of this device that lamination has heating resistor 12, low-melting fuse cell 13, first, second, third, fourth electrode 141,142,143,144 and circuit 15 on substrate 11, this substrate 11.Heating resistor 12 is interconnected by circuit 15 with low-melting fuse cell 13, and heating resistor 12 connects and is covered on first, second electrode 141,142.13 of fuse cells connect and are covered on third electrode, the 4th electrode 143,144 and the circuit 15.The first, 141,143,144 at the 3rd, the 4th electrode connects pin 16 respectively, in order to electric current is inputed or outputed each electrode 141,142,143,144.And when abnormality, for example overvoltage or overcurrent, heating resistor 12 heatings then make low-melting fuse cell 13 fusions separate, to cut off the effect that electric current reaches protective circuit.
In the protection component 1, form heating resistor 12 and fuse cell 13 again after forming each electrode 141,142,143,144 and circuit 15 on the substrate 1 earlier, its forming step is comparatively complicated; And in order to reach the precision of protective circuit, the resistance value error of employed heating resistor must be the smaller the better, and promptly the precision height of healing is good more.When flowing through heating resistor, big electric current can produce simultaneously high heat, so the joule's heat energy heat conduction that the consideration of heating resistor palpus itself produces is to the heat efficiency problem of low melting point fuse cell, and the temperature coefficient of resistance of heating resistor must be low more good more, to reduce the deviation that causes resistance value because of temperature rise, keep its resistance value precision, make the heating resistor can be under specific nominal current conditions, produce specific joule's heat energy, make the low melting point fuse cell cause its temperature to rise to certain specified temp fusing because of absorbing specific joule's heat energy.
Summary of the invention
The utility model provides the resistance value of heating resistor in a kind of controlling resistance fuse structure accurately, is difficult for producing the pin-type resistance fuse structure of error.
The technical solution adopted in the utility model is: a kind of resistance-type fuse unit comprises in the structure: the fuse and the fixing substrate of fuse also comprise in this fuse structure:
Two heating resistor electrodes are arranged on the substrate and are separated from each other;
Two fuse electrodes are arranged on the substrate and are separated from each other;
A heating resistor electrode and two fuse electrodes are connected respectively with wherein for three pins, this pin one end;
Heating resistor, this heating resistor and each electrode are arranged on the substrate simultaneously, and be connected to form one with each heating resistor electrode, heating resistor is provided with first protective layer, this heating resistor and the first protective layer surface are provided with cutting mouth, the first protective layer surface is provided with second protective layer, and cutting mouth is covered fully;
Fuse layer, fuse layer are arranged on the substrate and with each fuse electrodes and are connected, and are connected with one of them heating resistor electrode.
The beneficial effects of the utility model are: structure formation is easy, and heating resistor is the electric conducting material with low resistance temperature coefficient, can reduce the Yin Wendu rising and cause the resistance value deviation, keeps the precision of resistance value.
Description of drawings
Fig. 1 is a kind of structural representation of resistance-type fuse unit commonly used.
Fig. 2 is the structural representation of the utility model first embodiment.
Fig. 3 is the structure cutaway view of the utility model first embodiment.
Fig. 4 is the circuit diagram of the utility model first embodiment.
Fig. 5 is the utility model manufacture method schematic flow sheet.
Fig. 6 to Figure 11 is the structural representation of the utility model manufacturing process.
Figure 12 is the structural representation of the utility model second embodiment.
Figure 13 is the structural representation of the utility model the 3rd embodiment.
Figure 14 is the structural representation of substrate first surface among the 3rd embodiment.
Figure 15 is the structural representation of substrate second surface among the 3rd embodiment.
Among the figure, 1 is protection component, and 11 is substrate; 12 is heating resistor, and 13 is low-melting fuse cell, and 141 is first electrode; 142 is second electrode, and 143 is third electrode, and 15 is circuit; 16 is pin, and 2 is the resistance-type fuse unit, and 21 is substrate; 211 is first surface, and 212 is second surface, 221; 222 is the heating resistor electrode; 223; 224 is fuse electrodes, and 23 is connection line, and 24 is pin; 25 is heating resistor, and 26 is fuse layer, 26a; 26b is the point on the fuse layer; 261 is insulating barrier; 271 is first protective layer, and 272 is cutting mouth, and 273 is second protective layer; 28 is coupling assembling; 281 is connection line, and 282 are perforation, and 283 is articulamentum; 29 is the 3rd protective layer, and 31 is metal level.
Embodiment
The technical solution adopted in the utility model is: a kind of resistance-type fuse unit comprises in the structure: the fuse and the fixing substrate of fuse also comprise in this fuse structure:
Two heating resistor electrodes 221,222 are arranged on the substrate 11 and are separated from each other;
Two fuse electrodes 223,224 are arranged on the substrate 11 and are separated from each other;
A heating resistor electrode 221 and two fuse electrodes 223,224 are connected respectively with wherein for three pins 16, these pin 16 1 ends;
In the technical scheme of embodiment of the present utility model; described fuse layer 26 is arranged at second protective layer, 273 tops; fuse layer 26 tops are provided with insulating barrier 261, and fuse layer 26 is any one of silver or copper or tin or indium or bismuth or above-described metal.
In the technical scheme of embodiment of the present utility model, the scaling powder in the described insulating barrier 261 contains abietic resin.
In the technical scheme of embodiment of the present utility model, described insulating barrier 261 surfaces are provided with the 3rd protective layer 29.
In the technical scheme of embodiment of the present utility model, described first, second protective layer 271,273 is for having the insulating material of high thermal conductivity, and heating resistor 25 adopts the electric conducting material with low resistance temperature coefficient.
In the technical scheme of embodiment of the present utility model; described the 3rd protective layer 29 is for having the thermal resistance of insulation material of low heat conductivity, and thermal resistance of insulation material is the thermoset resin material of epoxy resin or silicones or pi resin or the thermoplastic resin material of polyamide or polycarbonate or liquid crystal high polymer material.
In the technical scheme of embodiment of the present utility model; the insulating material that first, second protective layer 271,273 is adopted with high thermal conductivity; for: silicon dioxide or aluminium oxide or aluminium nitride or carborundum or beryllium oxide; the electric conducting material with low resistance temperature coefficient that heating resistor 25 is adopted means the electric conducting material with low resistance temperature varying coefficient function, for: any one of chromium or nickel or copper or manganese or above-mentioned metal.
In the technical scheme of embodiment of the present utility model, each electrode 221,222,223,224, pin 16, heating resistor 25 and fuse layer 26 are arranged on the same surface of substrate 11.
In the technical scheme of embodiment of the present utility model, described fuse layer 26 is connected by coupling assembling 28 with wherein a heating resistor electrode 222, coupling assembling 28 is provided with connection line 281, perforation 282 and is arranged at the articulamentum 283 of perforation in 282, this connection line 281 is located at the second surface 212 of substrate 11 and is connected with fuse layer 26, bores a hole 282 to be arranged at wherein between the heating resistor electrode 222 and connection line 281.
In the technical scheme of embodiment of the present utility model, heating resistor electrode 221,222 and heating resistor 25 are arranged at the first surface 211 of substrate 11, fuse electrodes 223,224 and fuse layer 26 are arranged on the second surface 212 of substrate 11, and described first surface 211 and second surface 212 are to be oppositely arranged.
Below in conjunction with accompanying drawing the utility model is further elaborated.
2,3 couples of first embodiment of the present utility model are described further referring to accompanying drawing.Include in the structure of first embodiment of the present utility model: substrate 21, two heating resistor electrodes 221,222, each heating resistor electrode 221,222 is arranged on the substrate 21 and is separated from each other; Two fuse electrodes 223,224, each fuse electrodes 223,224 is arranged on the substrate 21 and is separated from each other; Three pins 24, pin 24 1 ends are connected with wherein a heating resistor electrode 221 and two fuse electrodes 223,224 respectively, in order to electric current is inputed or outputed this electrode 221,223,224; Heating resistor 25, heating resistor 25 is formed on this substrate 21 with each electrode 221,222,223,224 simultaneously, and is electrically connected with each heating resistor electrode 221,222 formation, makes its heating resistor 25 connect heating resistor electrodes 221,222 and forms one.Heating resistor 25 is provided with first protective layer 271, and heating resistor 25 and first protective layer, 271 surfaces are provided with cutting mouth 272, and first protective layer, 271 surfaces are provided with second protective layer 273, and cutting mouth 272 is covered fully; Fuse layer 26 is arranged on the substrate 21, and is connected with each fuse electrodes 223,224, and fuse layer 26 tops also are provided with insulating barrier 261, and insulating barrier 261 can be for containing the scaling powder of rosin tree lipid; At last can be further can be at insulating barrier 261 surface coverage the 3rd protective layer 29, the three protective layers 29 for having the thermal resistance insulation material of low heat conductivity.
Each electrode 221,222,223,224, pin 24, heating resistor 25 and fuse layer 26 are arranged on these substrate 21 same surfaces; fuse layer 26 is arranged at second protective layer, 273 tops, and fuse layer 26 is connected by connection line 23 with a heating resistor electrode 222 wherein.
Referring to accompanying drawing 4, during the actual use of the utility model,, base current ib is sharply circulated if Zener diode (Zener diode) is applied the above back voltage of puncture voltage.Therefore, make big collected current ic, and make heating resistor 25 heatings by heating resistor 25.The joule's heat energy that this heating is produced is with the fuse layer 26 of heat conduction on heating resistor 25, and low-melting fuse layer 26 that fuses is for preventing that terminal A1, A2 are applied overvoltage.In the case, because fuse layer 26 will be fused in 2 positions such as 26a and 26b, therefore just cut off energising after the fusing fully to heating resistor 25.The utility model can improve thick-film resistor commonly used after laser correction resistance value again during protective mulch; because resistive element is with large tracts of land contact protection layer; can cause the resistance value of resistive element to produce bigger error, more can accurately control the resistance value of heating resistor 25.Referring to accompanying drawing 5-11, manufacture method of the present utility model has following a few step:
Steps A, the substrate 21 that provides a surface coverage that metal level 31 is arranged.Referring to accompanying drawing 6, substrate 21 can be for tool thermal endurance and dimensional stability organic material preferably, as epoxy resin impregnation glass fibre, pi resin and pi resin impregnation glass fibre etc. and inorganic material, as pottery etc.Metal level 31 can be the alloy material of tool high resistivity, for example nickel chromium triangle, ambrose alloy, nickel alloy, copper-manganese, copper alloy etc.
Step B, on this metal level 31, be formed with heating resistor electrode 221,222, fuse electrodes 223,224 and heating resistor 25 simultaneously.Referring to accompanying drawing 7, heating resistor 25 connects each heating resistor electrode 221,222, makes its heating resistor 25 and heating resistor electrode 221,222 form one.Can utilize operation moulding such as pasting dry film, UV exposure, development, etching and stripping.
Step C, can utilize mode of printing to form first protective layers 271 on heating resistor 25 surface.The insulation material of tool high thermal conductivity can be referring to accompanying drawing 8, the first protective layers 271, the polymer composite of the inorganic fillings of high thermal conductivity can be contained for macromolecule.Wherein, macromolecular material can be thermoset resin material or thermoplastic resin materials such as polyamide, polycarbonate and liquid crystal high polymer material such as epoxy resin, silicones, pi resin, and the inorganic fillings of high thermal conductivity can be silicon dioxide, aluminium oxide, aluminium nitride, carborundum and beryllium oxide etc.
Step D, use laser or mechanical resistance adjuster are adjusted the resistance value of heating resistor 25, and are formed with cutting mouth 272 at heating resistor 25 and first protective layer, 271 surfaces, referring to accompanying drawing 9.
Step e, forming second protective layers 273 on first protective layer 271 surface, and cutting mouth 272 is covered fully, can be identical material with first protective layer referring to accompanying drawing 10, the second protective layers 273.
Step F, formation connection line 23.Second protective layer 273 exposes part heating resistor electrode 222 in the step e, and referring to accompanying drawing 11,23 of connection lines are arranged at second protective layer, 273 tops and are connected with heating resistor electrode 222.
Step G, formation fuse layer 26.This fuse layer 26 is connected with fuse electrodes 223,224, and is connected with a heating resistor electrode 222 wherein through connection line 23, finishes the resistance-type fuse unit 2 shown in accompanying drawing 2, the accompanying drawing 3.
Referring to Figure 12, it is provided with equally in this embodiment: substrate 21, heating resistor electrode 221,222, fuse electrodes 223,224, pin 24, heating resistor 25 and fuse layer 26.And each heating resistor electrode 221,222, fuse electrodes 223,224, pin 24, heating resistor 25 and fuse layer 26 are arranged on the same surface of substrate 21, and heating resistor 25 and fuse layer 26 non-overlapped settings, fuse layer 26 is connected by connection line 23 with a heating resistor electrode 222 wherein.
Referring to Figure 13, it is provided with equally in this embodiment: substrate 21, heating resistor electrode 221,222, fuse electrodes 223,224, pin 24, heating resistor 25 and fuse layer 26.Referring to accompanying drawing 14, each heating resistor electrode 221,222 and heating resistor 25 are arranged at the first surface 211 of substrate.Referring to accompanying drawing 15, each fuse electrodes 223,224 and fuse layer 26 are arranged at the second surface 212 of substrate.Referring to accompanying drawing 13, first, second surface the 211, the 212nd, corresponding setting, fuse layer 26 is connected by coupling assembling 28 with a heating resistor electrode 222 wherein, coupling assembling 28 is provided with connection line 281, perforation 282 and is located at the articulamentum 283 of perforation in 282, this connection line 281 is located at second surface 212 and is connected with fuse layer 26, bore a hole 281 of 282 heating resistor electrodes 222 then located therein and connection lines are to constitute being connected of fuse layer 26 and heating resistor electrode 222.
Each electrode of the utility model, connection line and heating resistor can be by one step moulding simultaneously, and its processing is comparatively easy.The utility model is revised resistance after carrying out overlay film earlier again, and carries out the overlay film second time, for the second time during overlay film and the contact area of resistive layer only limit to the cutting mouth place, the influence of the resistance value error that causes is with very little.Heating resistor of the present utility model is the person that has the low resistance temperature coefficient, can reduce that Yin Wendu raises and the resistance value deviation that causes is kept its resistance value precision.
Claims (10)
1. resistance-type fuse unit comprises in the structure: the fuse and the fixing substrate of fuse is characterized in that: also comprise in this fuse structure:
Two heating resistor electrodes (221,222) are arranged on substrate (11) and go up and be separated from each other;
Two fuse electrodes (223,224) are arranged on substrate (11) and go up and be separated from each other;
A heating resistor electrode (221) and two fuse electrodes (223,224) are connected respectively with wherein for three pins (16), these pin (16) one ends;
Heating resistor (25), this heating resistor (25) is arranged on the substrate (11) simultaneously with each electrode (221,222,223,224), and be connected to form one with each heating resistor electrode (221,222), heating resistor (25) is provided with first protective layer (271), this heating resistor (25) and first protective layer (271) surface are provided with cutting mouth (272), first protective layer (271) surface is provided with second protective layer (273), will cut (272) and cover fully;
Fuse layer (26), fuse layer (26) are arranged on the substrate and with each fuse electrodes (223,224) and are connected, and are connected with one of them heating resistor electrode (222).
2. a kind of resistance-type fuse unit according to claim 1; it is characterized in that: described fuse layer (26) is arranged at second protective layer (273) top; fuse layer (26) top is provided with insulating barrier (261), and fuse layer (26) is any one of silver or copper or tin or indium or bismuth or above-described metal.
3. a kind of resistance-type fuse unit according to claim 2 is characterized in that: the scaling powder in the described insulating barrier (261) contains abietic resin.
4. a kind of resistance-type fuse unit according to claim 2 is characterized in that: described insulating barrier (261) surface is provided with the 3rd protective layer (29).
5. a kind of resistance-type fuse unit according to claim 1 is characterized in that: described first, second protective layer (271,273) is for having the insulating material of high thermal conductivity, and heating resistor (25) adopts the electric conducting material with low resistance temperature coefficient.
6. a kind of resistance-type fuse unit according to claim 4; it is characterized in that: described the 3rd protective layer (29) is for having the thermal resistance of insulation material of low heat conductivity, and thermal resistance of insulation material is the thermoset resin material of epoxy resin or silicones or pi resin or the thermoplastic resin material of polyamide or polycarbonate or liquid crystal high polymer material.
7. a kind of resistance-type fuse unit according to claim 5; it is characterized in that: the insulating material that first, second protective layer (271,273) is adopted with high thermal conductivity; for: silicon dioxide or aluminium oxide or aluminium nitride or carborundum or beryllium oxide; the electric conducting material with low resistance temperature coefficient that thermal resistance (25) is adopted means the electric conducting material with low resistance temperature varying coefficient function, for: any one of chromium or nickel or copper or manganese or above-mentioned metal.
8. a kind of resistance-type fuse unit according to claim 1 is characterized in that: each electrode (221,222,223,224), pin (16), heating resistor (25) and fuse layer (26) are arranged on the same surface of substrate (11).
9. a kind of resistance-type fuse unit according to claim 1, it is characterized in that: described fuse layer (26) is connected by coupling assembling (28) with wherein a heating resistor electrode (222), coupling assembling (28) is provided with connection line (281), bores a hole (282) and is arranged at the articulamentum (283) in the perforation (282), this connection line (281) is located at the second surface (212) of substrate (11) and is connected with fuse layer (26), and perforation (282) then is arranged at wherein between the heating resistor electrode (222) and connection line (281).
10. a kind of resistance-type fuse unit according to claim 1, it is characterized in that: heating resistor electrode (221,222) and heating resistor (25) are arranged at the first surface (211) of substrate (11), fuse electrodes (223,224) and fuse layer (26) are arranged on the second surface (212) of substrate (11), and described first surface (211) and second surface (212) are to be oppositely arranged.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009201330836U CN201570468U (en) | 2009-06-26 | 2009-06-26 | Resistive fuse device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009201330836U CN201570468U (en) | 2009-06-26 | 2009-06-26 | Resistive fuse device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201570468U true CN201570468U (en) | 2010-09-01 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2009201330836U Expired - Lifetime CN201570468U (en) | 2009-06-26 | 2009-06-26 | Resistive fuse device |
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| Country | Link |
|---|---|
| CN (1) | CN201570468U (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103515166A (en) * | 2012-06-27 | 2014-01-15 | 功得电子工业股份有限公司 | Fuse structure |
| CN106653513A (en) * | 2016-12-30 | 2017-05-10 | 上海长园维安电子线路保护有限公司 | Automatic control protector conforming to high-voltage and low-voltage dual-function protection and fabrication method of automatic control protector |
| CN106783448A (en) * | 2017-02-28 | 2017-05-31 | 中山市思福电子厂 | A kind of resistance-type coiling fuse and its manufacturing process |
| CN107087316A (en) * | 2017-04-28 | 2017-08-22 | 宁波柔碳电子科技有限公司 | A kind of method for excessive heating protection of graphene Electric radiant Heating Film and graphene Electric radiant Heating Film with overtemperature protection system |
-
2009
- 2009-06-26 CN CN2009201330836U patent/CN201570468U/en not_active Expired - Lifetime
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103515166A (en) * | 2012-06-27 | 2014-01-15 | 功得电子工业股份有限公司 | Fuse structure |
| CN106653513A (en) * | 2016-12-30 | 2017-05-10 | 上海长园维安电子线路保护有限公司 | Automatic control protector conforming to high-voltage and low-voltage dual-function protection and fabrication method of automatic control protector |
| CN106653513B (en) * | 2016-12-30 | 2023-08-25 | 上海维安电子股份有限公司 | Self-control protector meeting high-voltage low-voltage dual-function protection and manufacturing method thereof |
| CN106783448A (en) * | 2017-02-28 | 2017-05-31 | 中山市思福电子厂 | A kind of resistance-type coiling fuse and its manufacturing process |
| CN107087316A (en) * | 2017-04-28 | 2017-08-22 | 宁波柔碳电子科技有限公司 | A kind of method for excessive heating protection of graphene Electric radiant Heating Film and graphene Electric radiant Heating Film with overtemperature protection system |
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Effective date of registration: 20161118 Address after: Fenggang Yan Tin Town 523000 Guangdong city of Dongguan Province Patentee after: DONGGUAN HUAHENG ELECTRONICS CO., LTD. Address before: 517000 Heyuan hi tech Development Zone, science and technology, No. three road, No. 2, Guangdong Patentee before: Yan Qiongzhang Patentee before: Yan Ruizhi |
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| CX01 | Expiry of patent term |
Granted publication date: 20100901 |
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| CX01 | Expiry of patent term |