CN205621728U

CN205621728U - Electrostatic protection device

Info

Publication number: CN205621728U
Application number: CN201620405097.9U
Authority: CN
Inventors: 朱世良
Original assignee: Hangzhou East Electronic Technology Co Ltd
Current assignee: Hangzhou East Electronic Technology Co Ltd
Priority date: 2016-05-06
Filing date: 2016-05-06
Publication date: 2016-10-05
Anticipated expiration: 2026-05-06

Abstract

The utility model discloses an electrostatic protection device, it is equipped with two symmetrical electrodes including inside, has certain clearance between the electrode, , middle filled polymer's pressure sensitive, the resistance of this high molecular pressure sensitive changes along with the voltage variation who applys. , the protector has two lead ends of symmetry, and one of them electrode tip is connected with protective device, and another electrode tip is connected with the earth connection, , overall structure is welded integratively by the slicken solder to through the molded package, only expose the welding ends of two electrodes. The purpose of the utility model is to provide a provide an electrostatic protection device, its electrode terminal surface can not burnt through electrostatic discharge's impact many times, simultaneously, an electrode of being connected with the input in electrostatic protection device contacts with the high voltage static source to form the high potential between and when poor, can change the polymer pressure sensitive into the low resistance attitude from the high resistance attitude, with the leading -in underground of electrostatic energy, thereby protected with other components and parts of input.

Description

A kind of electrostatic protector

Technical field

This utility model relates to electrostatic protector, particularly relates to SMD electrostatic protector.

Background technology

Electrostatic is a kind of natural phenomena caused because of CHARGE DISTRIBUTION imbalance.When two kinds of non-conductor phase mutual friction or contact Time, it may occur that the phenomenon of separation of charge transfer, if during separating, charge buildup, electrostatic on object band will be made.When Accumulation of static electricity can puncture medium discharge therebetween to a certain extent, here it is static discharge phenomenon.Static discharge is in electron trade Middle meeting becomes the fatal killer of electronic devices and components.Can be right because of fricative static discharge in human body, environment or transportation Components and parts cause irreversible damage.To this end, depending on IEC61000-4-2 standard is aiming at the damage that static discharge causes The level of protection of justice and test grade.Along with TC circuit small and highly dense type, electrostatic protection is at various electrical equipment and electricity Status in subset is more and more important.The kind of electrostatic protector is also in variation therewith, and its performance requirement is more and more higher. But most of protectors all use single metal level as interior electrode, and mostly are Cu metal level.Owing to electrostatic protector stands The highest repeatedly 30A of discharge current or more than, the electric current density between discharging gap can be bigger, the end face of electrode be easy to by Ablation.Especially for Cu metal electrode layer, corresponding fusing point is relatively low, it is easier to ablated, and discharging gap can be made progressively to become big The trigger voltage making device gradually rises, and causes the antistatic capacity of device to decline.

Utility model content

This utility model is to solve many places deficiency present in present stage, it is provided that a kind of electrostatic protector, technology is to pass through Between two electrodes having certain interval, the pressure sensitive of filled high polymer realizes, the resistance of this high molecular pressure sensitive with The change in voltage that applied and change.When the electrode connected with input in electrostatic protector contacts with high-voltage static power, Thus and between the electrode of another ground connection during formation high potential difference, macromolecule pressure sensitive is changed into low resistance state from high-resistance state, Electrostatic energy is imported underground, thus protects other components and parts being connected with input.

Described, a kind of electrostatic protector, it includes that inside is provided with two symmetrical electrodes, has certain interval between electrode, Described, the high molecular pressure sensitive of central filler, the resistance of this high molecular pressure sensitive becomes with the change in voltage applied Change.Described, protector have symmetry two lead ends, wherein an electrode tip with protect device be connected, another electrode tip with connect Ground wire is connected, described, and overall structure is welded into one by slicken solder, and by resin moulded encapsulation, only exposes two electrodes Welding ends.

As preferably, internal electrode is made up of the titanium alloy member of molding, only has two symmetrical lead ends outside structure, There is no dividing of anode and cathode, full symmetric.

As preferably, pressure sensitive is coated on the nano-multicrystal semi-conducting material of sodium particle surface and constitutes by silicone rubber, In conducting state under low resistance state high voltage, in state of insulation under high-resistance state low-voltage.

As preferably, the particle diameter of described nano-multicrystal semiconductor particle is 10～200nm.

Benefit effect of the present utility model: a kind of electrostatic protector has simple in construction, installation simple operation, leads accurately Energising pressure, the parasitic capacitance that surge absoption ability is strong, low, quick response speed, nonpolarity, bi-directional symmetrical, reliability height, can Realize single channel or the multichannel protection of circuit, quickly macromolecule pressure sensitive can be changed into low resistance state from high-resistance state, will Electrostatic energy imports underground, thus protects other components and parts being connected with input.

Accompanying drawing explanation

Fig. 1 is this utility model section of structure.

L, resin moulded；2, electrode；3, pressure sensitive；

Detailed description of the invention

Below in conjunction with the accompanying drawings and embodiment, the structure to a kind of electrostatic protector of the present utility model is made to retouch the most in detail State.Following example are used for illustrating this utility model, but are not limited to scope of the present utility model.

As it is shown in figure 1, a kind of electrostatic protector, it includes that inside is provided with two symmetrical electrodes (2), between electrode (2) Having certain interval, described, the thickness in gap is 5mm；The high molecular pressure sensitive of central filler (3), this high molecular pressure-sensitive material The resistance of material (3) changes with the change in voltage applied.Described, protector has two lead ends, wherein electrodes of symmetry Holding and be connected with protection device, another electrode tip is connected with earth lead, described, and overall structure is welded into one by slicken solder, and Encapsulated by resin moulded (1), only expose the welding ends of two electrodes (2).

As preferably, internal electrode (2) is made up of the titanium alloy member of molding, and electrode (2) width is 10mm, ties from entirety Two lead ends only symmetrical from the point of view of outside structure, do not have dividing of anode and cathode, full symmetric.

As preferably, pressure sensitive (3) is coated on the nano-multicrystal semi-conducting material of sodium particle surface and constitutes by silicone rubber, In conducting state under low resistance state high voltage, in state of insulation under high-resistance state low-voltage.Described nano-multicrystal quasiconductor The particle diameter of particle is 10～200nm.

This utility model technology is real by there being the pressure sensitive of filled high polymer between the electrode of certain interval at two Existing, the resistance of this high molecular pressure sensitive changes with the change in voltage applied.When electrostatic protector connects with input The electrode connect contacts with high-voltage static power, thus and between the electrode of another ground connection during formation high potential difference, macromolecule is pressure-sensitive Material is changed into low resistance state from high-resistance state, and electrostatic energy imports underground, thus protects its that be connected with input His components and parts.A kind of electrostatic protector has simple in construction, installs simple operation, accurate conducting voltage, surge absoption ability By force, low parasitic capacitance, quick response speed, nonpolarity, bi-directional symmetrical, reliability high, the single channel of circuit or many can be realized Road is protected.

Claims

1. an electrostatic protector, its feature includes that inside is provided with two electrodes, has certain interval between electrode, and described, centre is filled out Filling high molecular pressure sensitive, the resistance of this high molecular pressure sensitive changes with the change in voltage applied, and protector has Two symmetrical lead ends, described, wherein an electrode tip is connected with protection device, and another electrode tip is connected with earth lead, Overall structure is welded into one by slicken solder, and by molded packages, only exposes the welding ends of two electrodes.

2. according to a kind of electrostatic protector described in claim l, it is characterised in that: internal electrode is by the titanium alloy member of molding Constitute.

3. according to a kind of electrostatic protector described in claim l, it is characterised in that: only have two symmetrical lead ends, do not have Dividing of anode and cathode, full symmetric.

4. according to a kind of electrostatic protector described in claim l, it is characterised in that: nano-multicrystal quasiconductor grain in pressure sensitive The particle diameter of son is 10～200nm.