CN203536146U - Novel 40D lightning protection piezoresistor - Google Patents

Novel 40D lightning protection piezoresistor Download PDF

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Publication number
CN203536146U
CN203536146U CN201320640026.3U CN201320640026U CN203536146U CN 203536146 U CN203536146 U CN 203536146U CN 201320640026 U CN201320640026 U CN 201320640026U CN 203536146 U CN203536146 U CN 203536146U
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China
Prior art keywords
line
wire
novel
piezoresistor
resistance
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Expired - Fee Related
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CN201320640026.3U
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Chinese (zh)
Inventor
陈春宇
高泮嵩
黄浩
李孔俊
张孟熙
梁慈河
黎明
郭镇宇
夏斌
彭霞辉
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GUANGZHOU FENGHUA BANGKE ELECTRONICS CO Ltd
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GUANGZHOU FENGHUA BANGKE ELECTRONICS CO Ltd
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Priority to CN201320640026.3U priority Critical patent/CN203536146U/en
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Publication of CN203536146U publication Critical patent/CN203536146U/en
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Abstract

The utility model discloses a novel 40D lightning protection piezoresistor comprising a voltage-sensitive chip, a first CP (Copper-Clad Steel) wire and a second CP wire, wherein the voltage-sensitive chip comprises a matrix and a metal layer formed on the surface of the matrix; the first CP wire is electrically connected with the upper surface of the metal layer; the second CP wire is electrically connected with the lower surface of the metal layer; a lead riser of the first CP wire and a lead riser of the second CP wire are bent to be shaped like a mosquito coil; the first CP wire and the second CP wire are both flat CP wires. By using the novel 40D lightning protection piezoresistor, the contact areas of the CP wires and the voltage-sensitive chip are increased, the displacement or chip shell phenomenon caused during chip mounting of a large-scale piezoresistor is reduced, therefore, the production efficiency and product qualification ratio are increased; meanwhile, the circulation capacity and maximum energy tolerable dose of the piezoresistor are increased; the traditional cylindrical CP wires are changed into the flat CP wires, so that the product qualification ratio is further increased. The novel 40D lightning protection piezoresistor can be widely applied to the field of electronic devices.

Description

A kind of novel 40D lighning proof type piezo-resistance
Technical field
The utility model relates to field of electronic devices, especially a kind of novel 40D lighning proof type piezo-resistance.
Background technology
CP line, is also called CP wire, is to take mild steel as heart yearn its appearance product that plated copper, tin or kamash alloy layer process in turn.It is a kind of novel composite wire, has high conductivity, good buckling performance, good solderability, good magnetic conductivity and good high frequency characteristics.
Piezo-resistance resistance value at a certain temperature can sharply reduce with the increase of voltage.Therefore, piezo-resistance is widely used in electronic circuit, be used for protection because the instantaneous voltage sudden change of electric power supply system may be to circuit injury.The technological process of lighning proof type piezo-resistance is: chip varistor production → routing → moulding → upper tin → clean → seal → mark → cutting → test → packing → warehouse-in.Traditional 40D(40D refers to that the diameter of chip varistor is 40mm) production technology of lighning proof type piezo-resistance has 2 kinds: the one, adopt the zinc-plated CP line of copper covered steel to bend to " ten " word cross spider and clamp chip varistor, upper tin seals formation, as shown in Figure 1; The 2nd, adopt the parallel chip varistor of clamping of zinc-plated iron plate, upper tin is sealed formation.Comparatively conventional is the first production technology.
But there is following problem in the 40D piezo-resistance that adopts traditional handicraft to produce:
(1) the 40D piezo-resistance that traditional handicraft is produced in the time of upper, employing be the mode of direct routing upper slice.The CP line of copper covered steel is when clamping chip varistor, and CP line is that line contacts with chip varistor, and the contact area of CP line and chip varistor is less, and the friction of contact is less; And the specification of chip varistor is large and Heavy Weight, therefore, easily there is chip varistor displacement and fall the phenomenons such as sheet, affected qualification rate and the production efficiency of product in the piezo-resistance that traditional handicraft is produced in process of production.
(2) the 40D piezo-resistance that traditional handicraft is produced forms " * " by CP line intersects word and clamps chip varistor, and CP line is columniform and CP line contacts with chip varistor and belongs to line and contact, and CP line and chip varistor are larger in the gap of contact site.Therefore,, when the 40D piezo-resistance that traditional handicraft is produced is welded, easily, because rosin joint causes Product jointing bad, affected the qualification rate of product.
Therefore, need in the industry a kind of novel 40D piezo-resistance improve or address the above problem.
Utility model content
In order to solve the problems of the technologies described above, the purpose of this utility model is: provide a kind of novel, can improve the lighning proof type piezo-resistance of conforming product rate and production efficiency.
The utility model solves the technical scheme that its technical problem adopts: a kind of novel 40D lighning proof type piezo-resistance, comprise chip varistor, a CP line and the 2nd CP line, described chip varistor comprises matrix and the metal level forming at matrix surface, a described CP line is electrically connected to the upper surface of metal level, and described the 2nd CP line is electrically connected to the lower surface of metal level; The shape of the lead riser bending of the shape of the lead riser bending of a described CP line and the 2nd CP line is mosquito-repellent incense shape, and a described CP line and the 2nd CP line are flat CP line.
Further, described matrix is zinc oxide body.
Further, described metal level is silver layer or copper layer.
Further, the thickness range of described metal level is 2.5 μ m-5.0 μ m.
Further, the diameter of described metal level is 36mm.
The beneficial effects of the utility model are: the shape of the lead riser bending of the shape of the lead riser bending of a CP line and the 2nd CP line is mosquito-repellent incense shape, increased the contact area of CP line and chip varistor, increase the friction between CP line and chip varistor, reduce large specification piezo-resistance and because weight lays particular stress on, produced the phenomenon that is shifted or falls sheet in the time of upper, thereby improved the qualification rate of production efficiency and product; Meanwhile, because the contact area of CP line and chip varistor has increased, the current density that flows to chip varistor will reduce, and can prevent like this because large electric current is by the thermal breakdown phenomenon causing, thereby improve discharge capacity and the ceiling capacity tolerance of piezo-resistance; The one CP line and the 2nd CP line are flat CP line, change traditional cylindrical CP line into flat CP line, reduce CP line and chip varistor in the gap of contact site, reduced because rosin joint causes the bad risk of Product jointing, further improved the qualification rate of product.
Accompanying drawing explanation
Below in conjunction with Figure of description and embodiment, the utility model is described in further detail.
Fig. 1 is the structural representation of traditional lighning proof type piezo-resistance;
Fig. 2 is the structural representation of a kind of novel 40D lighning proof type piezo-resistance of the utility model.
Reference numeral: 1, a CP line; 2, the 2nd CP line; 3, matrix; 4, metal level.
Embodiment
With reference to Fig. 2, a kind of novel 40D lighning proof type piezo-resistance, comprise chip varistor, a CP line 1 and the 2nd CP line 2, described chip varistor comprises matrix 3 and the metal level 4 forming on matrix 3 surfaces, a described CP line 1 is electrically connected to the upper surface of metal level 4, and described the 2nd CP line 1 is electrically connected to the lower surface of metal level 4; The shape of the lead riser bending of the shape of the lead riser bending of a described CP line 1 and the 2nd CP line 2 is mosquito-repellent incense shape, and a described CP line 1 and the 2nd CP line 2 are flat CP line.
Wherein, flat CP line is by obtaining traditional flat mode of cylindrical CP line pressure.The one CP line is connected with the upper and lower surface of chip of pressure sensitive resistor metal level respectively with the 2nd CP line, when then both draw from chip of pressure sensitive resistor junction again, to roughly contrary direction, extends, parallel after bending.Fig. 2 and Fig. 1 have only shown the structure of a side of chip varistor and connecting line (a CP line and the 2nd CP line), and the structure of another side structure to that indicated in the drawings is identical.
The utility model is being used on the basis of traditional pressure sensitive resistance production technology, and the length by suitable increase copper covered steel CP line, first bends to mosquito-repellent incense shape by CP line, then is flattened formation cross-connect cable, fully to guarantee the contact area of CP line and chip varistor.
Be further used as preferred embodiment, described matrix 3 is zinc oxide body.
Wherein, zinc oxide body is for to be formed and to be had certain thickness cylinder type zinc oxide body by the repressed rear sintering of zinc oxide material.
Be further used as preferred embodiment, described metal level 4 is silver layer or copper layer.
Wherein, metal level is the uniform silver layer of a layer thickness or the copper layer forming at zinc oxide surface after silk screen printing and sintering.
Be further used as preferred embodiment, the thickness range of described metal level 4 is 2.5 μ m-5.0 μ m.
Be further used as preferred embodiment, the diameter of described metal level 4 is 36mm.
The utility model is continued to use the production technology of existing piezo-resistance, do not need to use the production raw material of new piezo-resistance, only need suitably to increase the length of CP line, and by employing, improve the fixture of CP line moulding, CP line is bent to mosquito-repellent incense shape, form again to intersect and clamp chip varistor, finally according to existing technology, produce again.The direct contact surface that the utility model can improve CP line and chip varistor greatly amasss, and has solved large specification chip varistor and in production process, has fallen the problem of sheet, and improved discharge capacity and the ceiling capacity tolerance of piezo-resistance.
The utility model only need to increase the CP line of 1.2cm left and right length, redesign the mould of a set of lead-in wire moulding, at other raw material, do not do to change and production technology order does not all adjust in the situation that, 40D of the present utility model is large, and specification piezo-resistance has the following advantages:
(1) do not need to increase total material cost.Although the increase in demand of CP line length 1.2cm, CP line and chip varistor contact point space after flattening can be reduced, and have reduced the consumption of scolding tin.Owing to being filled with the noble silver of 3% content in scolding tin, therefore, the utility model can't cause increasing considerably of cost.
(2) by improved CP line mould, CP line is bent to mosquito-repellent incense shape, increased the contact area of CP line and chip varistor, increased the friction between CP line and chip varistor, reduce large specification piezo-resistance and because weight lays particular stress on, produced the phenomenon that is shifted or falls sheet in the time of upper, thereby improved the qualification rate of production efficiency and product.
(3) piezo-resistance is when work, when running into large electric current and being transferred to chip varistor from CP line, increase due to CP line and chip varistor contact area, the current density that flows to the chip of piezo-resistance will reduce, can prevent that like this piezo-resistance is because large electric current is by causing the phenomenon of thermal breakdown, thereby improve discharge capacity and the ceiling capacity tolerance of piezo-resistance.
More than that better enforcement of the present utility model is illustrated, but the utility model is created and is not limited to described embodiment, those of ordinary skill in the art also can make all equivalent variations or replacement under the prerequisite without prejudice to the utility model spirit, and the distortion that these are equal to or replacement are all included in the application's claim limited range.

Claims (5)

1. a novel 40D lighning proof type piezo-resistance, it is characterized in that: comprise chip varistor, a CP line (1) and the 2nd CP line (2), described chip varistor comprises matrix (3) and the metal level (4) forming on matrix (3) surface, a described CP line (1) is electrically connected to the upper surface of metal level (4), and described the 2nd CP line (2) is electrically connected to the lower surface of metal level (4); The shape of the lead riser bending of the shape of the lead riser bending of a described CP line (1) and the 2nd CP line (2) is mosquito-repellent incense shape, and a described CP line (1) and the 2nd CP line (3) are flat CP line.
2. a kind of novel 40D lighning proof type piezo-resistance according to claim 1, is characterized in that: described matrix (3) is zinc oxide body.
3. a kind of novel 40D lighning proof type piezo-resistance according to claim 1, is characterized in that: described metal level (4) is silver layer or copper layer.
4. a kind of novel 40D lighning proof type piezo-resistance according to claim 1, is characterized in that: the thickness range of described metal level (4) is 2.5 μ m-5.0 μ m.
5. a kind of novel 40D lighning proof type piezo-resistance according to claim 1, is characterized in that: the diameter of described metal level (4) is 36mm.
CN201320640026.3U 2013-10-16 2013-10-16 Novel 40D lightning protection piezoresistor Expired - Fee Related CN203536146U (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201320640026.3U CN203536146U (en) 2013-10-16 2013-10-16 Novel 40D lightning protection piezoresistor

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201320640026.3U CN203536146U (en) 2013-10-16 2013-10-16 Novel 40D lightning protection piezoresistor

Publications (1)

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CN203536146U true CN203536146U (en) 2014-04-09

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Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104021903A (en) * 2014-06-09 2014-09-03 常州市零伍壹玖电子有限公司 Bent-wire contact potentiometer
CN105139983A (en) * 2015-07-31 2015-12-09 成都铁达电子有限责任公司 Piezoresistor and lead thereof
CN107705950A (en) * 2017-10-10 2018-02-16 叶金洪 A kind of surface mount method of direct insertion piezo-resistance

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104021903A (en) * 2014-06-09 2014-09-03 常州市零伍壹玖电子有限公司 Bent-wire contact potentiometer
CN105139983A (en) * 2015-07-31 2015-12-09 成都铁达电子有限责任公司 Piezoresistor and lead thereof
CN105139983B (en) * 2015-07-31 2019-08-16 成都铁达电子股份有限公司 Piezoresistor and its lead
CN107705950A (en) * 2017-10-10 2018-02-16 叶金洪 A kind of surface mount method of direct insertion piezo-resistance

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GR01 Patent grant
CF01 Termination of patent right due to non-payment of annual fee
CF01 Termination of patent right due to non-payment of annual fee

Granted publication date: 20140409

Termination date: 20161016