CN102231937A

CN102231937A - Electronic static discharge (ESD) prevention circuit board for interface devices

Info

Publication number: CN102231937A
Application number: CN2011101567966A
Authority: CN
Inventors: 叶敏; 尤建春
Original assignee: TPV Display Technology Xiamen Co Ltd
Current assignee: TPV Display Technology Xiamen Co Ltd
Priority date: 2011-06-13
Filing date: 2011-06-13
Publication date: 2011-11-02

Abstract

The invention relates to an electronic static discharge (ESD) prevention circuit board for interface devices, which is mainly used for all connecting interface devices. In the invention, by arranging relative point-to-ground discharge leads beside a pin of an electronic static discharge sensitive element, which is close to the interface device and the easiest to damage, at intervals, static electricity can be rapidly discharged, so that the ESD resistance is achieved and electrical equipment is protected. The method is easy to implement, has low cost and is favorable for improving the competitiveness of a product.

Description

The circuit board of the anti-ESD of a kind of interface device

Technical field

The present invention relates to a kind of interface device circuit board, particularly a kind of interface device anti-electrostatic-discharge (electrostatic discharge, circuit board ESD).

Background technology

To be integrated circuit making, often taking place in transportation and the use and causing the IC chip to damage or one of major reason of losing efficacy Electrostatic Discharge.Therefore, for the better more reliable IC chip of obtained performance, ESD carried out to specialize in and find control method be very necessary.Along with chip size continue dwindle, the ESD problem shows more outstandingly, oneself become integrated circuit (IC) chip of new generation make and application process in need the major issue of paying attention to and putting forth effort to solve.But these high density integrated circuit elements then may cause inefficacy because of static electric field and static discharge current, perhaps cause " soft breakdown " phenomenon that is difficult to be it is found that, cause equipment locked, reset, loss of data and unreliable and influence the equipment operate as normal, equipment dependability is reduced, even cause the damage of equipment.

The effect that ESD produced is negative, static discharge is to cause most electronic device or electronic system to be subjected to one of principal element of excessively electrical stress EOS (Eleetrica1 Over stress) destruction, this destruction can cause semiconductor device and computer system etc. to form nonvolatil destruction, and then influence the circuit function of integrated circuit (IC) inside, make the electronic product cisco unity malfunction.

Each consumer electronics product mainly adopts following two methods on anti-esd protection at present: 1, strengthen the electrostatic discharge (ESD) protection of environment such as manufacturing, encapsulation, test, assembling and transportation, reduce the static source; 2, improve the protective capability of circuit to ESD itself, just esd protection device and the circuit design in the IC chip.Usually the esd protection circuit design mainly is adopted as the I/O buffering area provides a good electric current split channel to power supply network (Vss or Vdd); or a voltage box-bit circuit is provided near the entering apparatus that needs protection, one stops high pressure to enter gate input damages grid.Yet, existing technical problem, owing to add this esd protection circuit, for example increase of the increase of layout area or manufacturing step etc. will further strengthen manufacturing cost.

Therefore, how development and Design goes out the circuit board that a kind of interface device is prevented ESD, make it to providing suitable protection because of static discharge causes the circuit original paper of damage, avoid influencing the equipment operate as normal, reduce material cost simultaneously, save the space, become current integrated circuit ESD and protected one of urgent improved technical barrier.

Summary of the invention

The object of the present invention is to provide the circuit board of the anti-ESD of a kind of interface device, this circuit board helps realizing the static discharge near the most impaired pin of the static discharge senser of electronic product, to reach the effect of anti-ESD, the protection electric equipment.

Unresolved the problems referred to above, the circuit board of the anti-ESD of a kind of interface device provided by the invention, be applied to a kind of printed circuit board (PCB) (Printed Circuit Board PCB), comprises:

Near the other relative tip lead-in wire that discharges over the ground of establishing at interval in the easiest impaired pin of the static discharge senser place of interface device;

Discharge over the ground and are provided with triangle point discharge district between the lead-in wire in described senser the easiest impaired pin place and tip;

Lead-in wire is discharged over the ground by gold, silver or copper one-tenth in described tip.

Comprehensively above-mentioned, by the circuit board of the anti-ESD of a kind of interface device, provide a discharge path to the most impaired pin of static discharge senser of electronic product, and be unlikely to cause the damage of interface device because of static discharge; In addition, the circuit board of anti-ESD provided by the invention does not need to add anti-ESD components and parts again, utilizes the wiring board line design method, realizes simply can reducing cost greatly.

Description of drawings

Fig. 1 is the structural representation of the circuit board of the anti-ESD of legacy interface device.

Fig. 2 is the schematic rear view of the circuit board of the anti-ESD of interface device of the present invention.

Fig. 3 is the front schematic view of the circuit board of the anti-ESD of interface device of the present invention.

Embodiment

As shown in Figure 1, the circuit board of legacy interface device is near the pin of interface device holding wire, be generally the most impaired pin, but the circuit elements device of these highly denses causes inefficacy because of static electric field and static discharge current easily, cause equipment dependability to reduce, even damage.

In order to improve equipment dependability, adding ESD means of defence has been proposed.As shown in Figure 2, it is the circuit board of the anti-ESD of interface device that the present invention carried, and it is applied on the circuit board, and it is a printed circuit board (PCB), includes substrate 100, solder side 200, part surface 300.Wherein, also comprise lead 210 and guide hole 220 on the solder side 200.In addition, each components and parts is arranged on the part surface 300, this part surface 300 is one side of substrate 100, and the circuit of all components and parts is arranged at the another side of substrate 100, and just solder side 200.

The circuit board of the anti-ESD of a kind of interface device of the present invention, utilize static characteristic, to put to ground connection near static on the interface device holding wire, therefore, the easiest holding wire 211 places because of the impaired pin guide hole 221 of ESD of docking port device provide the path of a relative over the ground triangle point discharge district 500 as static discharge, can avoid damaging because of static discharge causes pin, the equipment that influences normally uses.

Printed circuit board (PCB) can be divided into soft printed circuit board or rigid printed circuit board (PCB); According to research staff's circuit design, the electric wiring of connecting circuit components and parts is depicted as wiring figure, then the manufacture process of circuit board be application of printed, shelter, technology such as etching and plating realize accurate distribution.

Refer again to shown in Figure 2ly, be the present invention's solder side 200, be attached to the one side of substrate 100, and lead all in this substrate 100 210 is concentrated solders side 200 so far, and utilize guide hole 220 that each components and parts is connected to solder side 200.

Refer again to shown in Figure 3, part surface 300 for the present invention, be attached to the another side of substrate 100, and with first components and parts 400, second components and parts 410 and the 3rd components and parts 420 or the like, be arranged at this part surface 300, these first components and parts, 400, the second components and parts 410 and the 3rd components and parts 420 or the like can be transistor, switch element or other electron component.

Lead 210 utilizes gold, silver or copper or the like conductive material, utilizes the preferable metal material of its conductance, and is covered with in this part surface 300.

Comprehensive above about description of contents of the present invention; the circuit board of the anti-ESD of a kind of interface device of the present invention can apply to all connecting interface devices; at static discharge, to reach the effect of anti-ESD, the protection electric equipment near the most impaired pin of the static discharge senser of electronic product.Owing to do not add esd protection circuit, this circuit has independence, does not influence the operate as normal of protected internal circuit simultaneously.

Claims

1. the circuit board of the anti-ESD of an interface device is characterized in that, near the other relative tip lead-in wire that discharges over the ground of establishing at interval in the easiest impaired pin of the static discharge senser place of interface device.

2. the circuit board of the anti-ESD of a kind of interface device as claimed in claim 1 is characterized in that, discharges over the ground and be provided with triangle point discharge district between the lead-in wire in described senser the easiest impaired pin place and tip.

3. triangle point discharge as claimed in claim 2 district is characterized in that, lead-in wire is discharged over the ground by gold, silver or copper one-tenth in described tip.