CN101662878A - Electrostatic defending device of multiple discharge paths - Google Patents
Electrostatic defending device of multiple discharge paths Download PDFInfo
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- CN101662878A CN101662878A CN200810198126A CN200810198126A CN101662878A CN 101662878 A CN101662878 A CN 101662878A CN 200810198126 A CN200810198126 A CN 200810198126A CN 200810198126 A CN200810198126 A CN 200810198126A CN 101662878 A CN101662878 A CN 101662878A
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- discharge
- protection apparatus
- electrostatic protection
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- discharge path
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Abstract
The invention relates to an electrostatic defending device of multiple discharge paths. The electrostatic defending device comprises a conducting wire, a discharge part and a plurality of grounding parts, wherein the conducting wire is used for providing electrostatic current to pass through; the discharge part is coupled to the conducting wire; the grounding parts surround the discharge part, anda discharge path is respectively formed between each grounding part and the discharge part for providing electrostatic discharge; and distances of all discharge paths are equal. When the discharge paths are increased, the success probability of inducing the electrostatic discharge is improved so as to ensure that the electrostatic current is easier to dissipate by a plurality of the discharge paths, and the service life of a discharge point and a grounding point is further improved.
Description
Technical field
The present invention relates to a kind of electrostatic protection apparatus, particularly a kind of electrostatic protection apparatus of many discharge paths.
Background technology
Static discharge (Electro Static Discharge, ESD) be to cause one of main cause that most of electronic building bricks or electronic system destroy, and the destruction of this kind static can be caused the damage of semiconductor subassembly, thereby influences the function of integrated circuit, makes electronic product lose effect.The device of release electrostatic adopts the principle of point discharge to realize more traditionally, adopt the electrostatic protection method of point discharge in the electronic installation, its practice is with the corresponding setting of two conductor tip, utilize this structure and produce the point discharge effect, with the earthing position in the rapid electrostatic current gatherer, and prevent electrostatic sensitive assembly or microcircuit from suffering the destruction of static and lost efficacy.
Yet, utilize point discharge on the prior art, bring out the practice that static discharge dissipates electrostatic current, the situation generation of induced discharge failure appears through regular meeting in practical operation.Reason roughly can classify as: (1) two conductor tip is apart from mis-arrange; (2) other discharge path occurs: static electric arc does not take the air line usually, and is positioned at the scope of three-dimensional space, conductor tip the place ahead, specific range, as long as other conductor is arranged, all may form new discharge path; (3) continuous discharge repeatedly; (4) conductor tip can make tip portion oxidation or carbonization after discharge repeatedly, produces most advanced and sophisticatedly to become circle and cause reason such as discharge effect variation.
Therefore, how solving the problem that electrostatic protection apparatus is derived on the prior art, is a subject under discussion that needs to be resolved hurrily.
Summary of the invention
In view of this present invention proposes a kind of electrostatic protection apparatus of many discharge paths.Utilize device proposed by the invention, make that a discharge tip can corresponding a plurality of ground connection tip, thereby produce many discharge path.
The present invention proposes a kind of electrostatic protection apparatus of many discharge paths, comprises: a lead, pass through in order to an electrostatic induced current to be provided; One discharge part is coupled to lead; Several grounding parts are provided with around discharge part, and discharge path is equidistant each other one of between each grounding parts and discharge part, in order to provide electrostatic induced current via lead, discharge part and discharge path, be discharged to one of them grounding parts arbitrarily.
The present invention also proposes a kind of electrostatic protection apparatus of many discharge paths, comprises: a lead, pass through in order to an electrostatic induced current to be provided, and form a discharge tip on lead; Several earth connections, each ground connection is online, and to form a ground connection respectively most advanced and sophisticated and be provided with around the discharge tip of lead, each ground connection is most advanced and sophisticated all identical with one of discharge tip spacing distance, and form a discharge path respectively between each ground connection tip and the discharge tip, be discharged to one of them ground connection tip arbitrarily in order to electrostatic induced current to be provided.
Compared with prior art, when discharge path increases, just and then improve the probalility of success of static induced discharge, make electrostatic induced current easier by many discharge path and dissipate.More can further improve the useful life at discharge tip and ground connection tip.
Description of drawings
Fig. 1 is the first embodiment schematic diagram of the electrostatic protection apparatus of many discharge paths;
Fig. 2 is the second embodiment schematic diagram of the electrostatic protection apparatus of many discharge paths;
Fig. 3 is the circuit diagram of Fig. 2.
Embodiment
Please refer to Fig. 1, this figure is depicted as the first embodiment schematic diagram of the electrostatic protection apparatus of many discharge paths.The electrostatic protection apparatus of many discharge paths comprises: lead 10, discharge part 20, grounding parts 30.
For fear of the electrostatic damage internal circuit, so the release electrostatic that palpus can be in good time, and the present invention adopts point discharge to come release electrostatic.In this, simply introduce earlier the principle of point discharge: the generation of point discharge depends primarily on electric field strength, and when having electric charge in a certain conductor, because the electric field of conductor inside is zero, so these electric charges will be distributed in surface of conductors.When reaching poised state, conductive surface is an equipotential surface, and the big more person's charge density of body surface curvature is high more; Relative, the more little person of body surface curvature, charge density is low more.Under the highfield effect, the place that body surface curvature is big (as top sharp-pointed, fines), because charge density height, equipotential plane is close, electric field strength increases severely, and near the air of object is ionized and dissociates to be negative ions, and the tip attracts different in nature ion, produce electric discharge phenomena, this promptly is referred to as point discharge.
In this, discharge part 20 proposed by the invention has at least one discharge tip, and each grounding parts 30 also has at least one ground connection tip respectively.Please continue with reference to Fig. 1, by shown in the figure as can be known, discharge part 20 be shaped as triangle, and the shape of grounding parts 30 can be similarly triangle, wherein, reducible slightly 7 mils of the length of side (mils) of the triangle that discharge part 20 and grounding parts 30 are constituted, but not as limit.
With Fig. 1 is that example explains, and discharge part 20 correspondences are provided with two grounding parts 30 in first embodiment, and grounding parts 30 can on average be arranged in the scope of discharge part 20 the place aheads 180 degree.Therefore, it with the quantity of grounding parts 30 two situation, the angle configurations situation that one of them discharge effect is preferable, for these two grounding parts 30 are spaced apart in 150 degree plus-minuss, the 5 degree scopes with the angle of discharge part 20 respectively, and these two grounding parts 30 angle each other is spaced apart in 60 degree plus-minuss, the 5 degree scopes.In this, form two discharge paths 40 altogether between the discharge tip of the ground connection of grounding parts 30 tip and discharge part 20.And each ground connection is most advanced and sophisticated all identical with the spacing distance of discharge tip.Wherein, spacing distance is the distance of so-called discharge path 40, and spacing distance 3 mils (mils) slightly, but not as limit.
When lead 10 casual generation static or when being subjected to static and attacking, this moment, static just imported discharge part 20 via lead 10, and,, and discharge electrostatic charge so that static Dao is gone into the ground plane or the main ground of system by corresponding grounding parts 30 generation point discharges.So, can prevent buildup of static electricity and attack the circuit intraware, and then cause the damage of assembly.
The present invention proposes each discharge part 20 simultaneously corresponding several grounding parts 30, so can provide many discharge paths 40, allow electrostatic induced current " arbitrarily " via discharge path 40, be discharged to one of them grounding parts 30, and then improve the probalility of success that static discharge is brought out in point discharge.Because, in the prior art, the general practice is in the dead ahead of discharge tip correspondence a ground connection tip to be set, yet, because the path that static electric arc is walked not is all to be straight line, so the discharge path that often makes the ground connection tip in discharge tip and dead ahead be constituted lost efficacy, and caused and can't static be imported earth terminal and dissipation static along ground, thereby caused the damage of circuit unit.Because in the scope of discharge tip the place ahead 180 degree, all may be the discharge path of static electric arc, therefore the present invention's proposition is provided with a plurality of grounding parts 30 as much as possible, and forms many discharge paths in the place ahead 180 degree scopes of the discharge tip of each discharge part 20.(distance is more little usually in the success or not of static discharge because the distance of discharge path concerns, the probalility of success of static discharge is high more), therefore the ground connection of each grounding parts 30 is most advanced and sophisticated all identical with the spacing distance of discharge tip, the distance that is to say every discharge path is all identical, and can not cause some ground connection distance between two tips discharge tip far away, and form the discharge path that static electric arc may not pass through, and make those ground connection tips perform practically no function.
Moreover because prior art has only single discharge path, so the consume situation at discharge tip and ground connection tip is comparatively serious, easily because of static discharge repeatedly causes most advanced and sophisticated oxidation (carbonization), causes the situation of static discharge failure to produce.And the electrostatic protection apparatus of bar discharge path more than proposed by the invention, because having many discharge paths, a discharge part 20 can provide static discharge (actual static discharge situation, static discharge that may be once only discharges by a discharge path wherein, perhaps static discharge once discharges by many discharge paths simultaneously), thus the useful life at discharge tip and ground connection tip the length next than prior art.Therefore, under same static discharge number of times, prior art may be because most advanced and sophisticated oxidation (carbonization) cause continuing to bring out static discharge, and the present invention still can provide the running of effective electrostatic discharge.
Please refer to Fig. 2, this figure is depicted as the second embodiment schematic diagram of the electrostatic protection apparatus of many discharge paths.In second embodiment, enumerate in the circuit any two leads and do explanation.Usually have positive pole and negative pole in the general circuit, by anodal with negative pole and complete transmission signal.Lead 12 is represented positive pole and negative pole respectively with lead 14 in Fig. 2, in order to complete transmission signal.
Perhaps having only a certain certain layer in the circuit board is ground plane, or only has a common earth terminal, but can utilize earth connection separately respectively between different circuits, is connected to ground plane or earth terminal, and finishes the action of ground connection.The present invention comprises some earth connections 32, and form a ground connection most advanced and sophisticated 34 on each bar earth connection 32 respectively and also be provided with among Fig. 2 with the discharge tip 22 of lead 14 around lead 12 respectively, be that example explains with two ground connection tips, but not as limit).Add that each ground connection most advanced and sophisticated 34 is all identical with the spacing distance of discharge tip 22, and form a discharge path respectively between each ground connection most advanced and sophisticated 34 and the discharge tip 22, in order to static discharge to be provided.
Please refer to Fig. 3, this figure is depicted as the circuit diagram of Fig. 2.By the circuit diagram of Fig. 3 as can be known, intraware 50 is by lead 12 and lead 14 transmission signals, and on lead 12 and lead 14, have many discharge paths of being formed by discharge tip 22 and ground connection tip 34 respectively, static can be imported ground plane or earth terminal, and reach the function of electrostatic defending.
In the prior art, usually adopt electro-static discharging generator (ESD Generator) or be referred to as static discharge simulator (ESD Simulator), be commonly called as ESD gun (ESD Gun), can operate as normal when being subjected to external static discharge in order to the check electronic equipment.ESD gun is the visual plant in test esd immunity (ESDimmunity) test, because static discharge is the high voltage fast rise, its rise time is less than 1ns (1/1000000000th second), be generally 0.7ns, therefore can be by the test of ESD gun for electronic equipment, performance requirement for apparatus assembly need be very high, also because requirement is very high, just can guarantee stable and reliable running of electronic equipment.
Yet; about about 0.7ns, promptly finish static discharge owing to ESD gun in the prior art; and set electrostatic protection assembly in the general electronic equipment; its required time of startup is about 0.7ms ~ 1ms; the electrostatic protection assembly must start-up time oversize, can't be before ESD gun is finished static discharge promptly start the function of protection.Therefore, depend merely on the testing standard that the electrostatic protection assembly can't satisfy ESD gun, so can the point discharge assembly be set at electrostatic protection assembly front end in the prior art.Utilize the point discharge assembly by static elder generation induced discharge, the start-up time of the available buffer rear end electrostatic protection assembly of holding concurrently.Yet, point discharge assembly of the prior art, often each point discharge assembly only has single discharge path, makes that the failure probability of static induced discharge is quite high.Therefore, by the electrostatic protection apparatus of many discharge paths proposed by the invention, can significantly improve the probalility of success of static induced discharge.
Moreover, in the industrial specification of integrated circuit (IC) design (IC Design), stipulate that each IC pin (pin) must be able to tolerate the electrostatic potential of 2KV.Through adopting the electrostatic protection apparatus of bar discharge path more than the present invention, and learnt that by experiment the electrostatic potential that each IC pin can tolerate can promote and be 4KV, so the static withstand voltage doubles than prior art, significantly promotes the effect of electrostatic defending.
The angle configurations mode of relevant the various embodiments described above grounding parts (or ground connection tip), the present invention is not limited, as long as a plurality of grounding parts (or ground connection tip) scope equidistant, that be symmetricly set in discharge part (or discharge tip) the place ahead 180 degree is interior; For example, two grounding parts (or ground connection tip) are equidistant, when being symmetrical arranged, the two mutual angle (is that calculate in the center of circle with end before discharge part or the discharge tip) also can be 10 degree, 20 degree, 30 degree, 40 degree, 50 degree, 70 degree, 80 degree, 90 degree, 100 degree, 110 degree, 120 degree, 130 degree, 140 degree, 150 degree, 160 degree, 170 degree (the above number of degrees have the scopes of plus-minus 5 degree respectively).
Though technology contents of the present invention discloses as above with preferred embodiment; right its is not in order to limit the present invention; anyly have the knack of this skill person; do a little change and retouching in the spirit that does not break away from the present invention; all should be covered by in the category of the present invention, so the present invention's protection range is as the criterion as claims person of defining that look the present invention.
Claims (18)
1. the electrostatic protection apparatus of many discharge paths is characterized in that, comprises:
One lead passes through in order to an electrostatic induced current to be provided;
One discharge part is coupled to this lead; And
Several grounding parts, be provided with around this discharge part, discharge path is equidistant each other one of between each this grounding parts and this discharge part, in order to provide this electrostatic induced current via this lead, this discharge part and this discharge path, be discharged to one of them these some grounding parts arbitrarily.
According to claim 1 more than the electrostatic protection apparatus of bar discharge path, it is characterized in that this discharge part has at least one discharge tip, and each this grounding parts has at least one ground connection tip respectively.
3. as the electrostatic protection apparatus of bar discharge path more than as described in the claim 2, it is characterized in that a spacing distance at this ground connection tip of this discharge tip and each is all identical.
4. as the electrostatic protection apparatus of bar discharge path more than as described in the claim 3, it is characterized in that this spacing distance is 3 mils slightly.
According to claim 1 more than the electrostatic protection apparatus of bar discharge path, it is characterized in that, this discharge part be shaped as a triangle.
6. as the electrostatic protection apparatus of bar discharge path more than as described in the claim 5, it is characterized in that the length of side of this triangular form is 7 mils approximately slightly.
According to claim 1 more than the electrostatic protection apparatus of bar discharge path, it is characterized in that, this grounding parts be shaped as a triangle.
8. as the electrostatic protection apparatus of bar discharge path more than as described in the claim 7, it is characterized in that the length of side of this triangular form is 7 mils approximately slightly.
According to claim 1 more than the electrostatic protection apparatus of bar discharge path, it is characterized in that the quantity of those grounding parts is two, this two grounding parts symmetry, equidistantly be arranged in these discharge part the place ahead 180 degree scopes.
According to claim 1 more than the electrostatic protection apparatus of bar discharge path, it is characterized in that, the quantity of those grounding parts is two, and the angle of this two grounding parts and this discharge part is respectively in 150 degree plus-minuss, the 5 degree scopes at interval, and this two grounding parts angle each other is spaced apart in 60 degree plus-minuss, the 5 degree scopes.
11. the electrostatic protection apparatus of many discharge paths is characterized in that, comprises:
One lead passes through in order to an electrostatic induced current to be provided, and forms a discharge tip on this lead; And
Several earth connections, each this ground connection is online, and to form a ground connection respectively most advanced and sophisticated and be provided with around this discharge tip of this lead, each this ground connection most advanced and sophisticated all identical with one of this discharge tip spacing distance with respectively as a discharge path, be discharged to one of them this ground connection tip arbitrarily in order to this electrostatic induced current to be provided.
12. the electrostatic protection apparatus as bar discharge path more than as described in the claim 11 is characterized in that this spacing distance is 3 mils slightly.
13. the electrostatic protection apparatus as bar discharge path more than as described in the claim 11 is characterized in that, this discharge tip be shaped as a triangle.
14. the electrostatic protection apparatus as bar discharge path more than as described in the claim 13 is characterized in that the length of side of this triangular form is 7 mils approximately slightly.
15. the electrostatic protection apparatus as bar discharge path more than as described in the claim 11 is characterized in that, this ground connection tip be shaped as a triangle.
16. the electrostatic protection apparatus as bar discharge path more than as described in the claim 15 is characterized in that the length of side of this triangular form is 7 mils approximately slightly.
17. the electrostatic protection apparatus as bar discharge path more than as described in the claim 11 is characterized in that the quantity at those ground connection tips is two, the most advanced and sophisticated symmetry of this two ground connection also equidistantly is arranged in these discharge tip the place ahead 180 degree scopes.
18. electrostatic protection apparatus as bar discharge path more than as described in the claim 11, it is characterized in that, the quantity at those ground connection tips is two, the most advanced and sophisticated angle with this discharge tip of this two ground connection is respectively in 150 degree plus-minuss, the 5 degree scopes at interval, and this two ground connection tip angle each other is spaced apart in 60 degree plus-minuss, the 5 degree scopes.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200810198126A CN101662878A (en) | 2008-08-29 | 2008-08-29 | Electrostatic defending device of multiple discharge paths |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200810198126A CN101662878A (en) | 2008-08-29 | 2008-08-29 | Electrostatic defending device of multiple discharge paths |
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| Publication Number | Publication Date |
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| CN101662878A true CN101662878A (en) | 2010-03-03 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN200810198126A Pending CN101662878A (en) | 2008-08-29 | 2008-08-29 | Electrostatic defending device of multiple discharge paths |
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| CN (1) | CN101662878A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108490225A (en) * | 2018-04-16 | 2018-09-04 | 北京铂帷检测服务有限公司 | A kind of coupling plate electrostatic discharge testing adaptive device and method |
| CN110433315A (en) * | 2019-09-06 | 2019-11-12 | 河南普润仪器设备有限公司 | A kind of Electronics Factory's dust-free workshop sterilizing unit |
-
2008
- 2008-08-29 CN CN200810198126A patent/CN101662878A/en active Pending
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108490225A (en) * | 2018-04-16 | 2018-09-04 | 北京铂帷检测服务有限公司 | A kind of coupling plate electrostatic discharge testing adaptive device and method |
| CN108490225B (en) * | 2018-04-16 | 2024-03-26 | 北京铂帷检测服务有限公司 | Coupling plate electrostatic discharge test adapting device and method |
| CN110433315A (en) * | 2019-09-06 | 2019-11-12 | 河南普润仪器设备有限公司 | A kind of Electronics Factory's dust-free workshop sterilizing unit |
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Application publication date: 20100303 |