CN100334923C - Electron device having anti static discharging circuit board - Google Patents
Electron device having anti static discharging circuit board Download PDFInfo
- Publication number
- CN100334923C CN100334923C CNB2003101136532A CN200310113653A CN100334923C CN 100334923 C CN100334923 C CN 100334923C CN B2003101136532 A CNB2003101136532 A CN B2003101136532A CN 200310113653 A CN200310113653 A CN 200310113653A CN 100334923 C CN100334923 C CN 100334923C
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- circuit board
- housing
- circuit
- electronic installation
- installation according
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Abstract
The present invention provides an electronic device for preventing a circuit board of an electronic assembly from being damaged by external electrostatic discharge, which comprises a casing, a circuit board and a grounding means, wherein the circuit board comprises an electronic assembly formed on the circuit board, and the periphery of the electronic assembly corresponds to a slit on the casing; the grounding means is formed on the circuit board and corresponds to the slit on the casing, and the grounding means is used for dispersing static electricity on the periphery of the electronic assembly. No other electronic assembly, control circuit or power circuit exists within a preset distance in a position on the circuit board, which corresponds to the slit on the casing, except for a grounding means, and no other electronic assembly, control circuit or power circuit exists within another preset distance of the grounding means on the circuit board except for a grounding wire.
Description
Technical field
The invention provides a kind of electronic installation, refer to that especially a kind of tool prevents that the exterior static discharge from damaging the electronic installation of circuit board.
Background technology
Static (Static Electricity) can be described as immanent, and the object friction of any two unlike materials all might produce static.And exterior static touches the instantaneous pressure discharge that circuit produces, can influence circuit and operate normally, even cause irreversible damage, thus via static discharge (electrostatic discharge, ESD) caused infringement is easy to cause the inefficacy of electronic system.Along with semiconductor technology evolves is increasingly mature, the integrated circuit of being produced with semiconductor technology is applied in the electronic installation miscellaneous at large.Intersperse among circuit board traditional circuit everywhere compared to part, integrated circuit is because structure is meticulous, rated current is relatively very little, and its tolerance level for the external static electrification discharge is also relatively lower.External static electrification often sees through the external terminal of this integrated circuit and flows into wherein, burns the structure of this integrated circuit and makes the electronic installation of using this integrated circuit to operate.Therefore the electrostatic discharge (ESD) protection measure of electronic installation becomes an important subject under discussion then.
In order to solve the problem that static discharge causes, in response to safeguard procedures have two kinds usually.But the first exterior static mats such as internal circuit and I/O pin itself and import to external terminal between a protective circuit is set; this protective circuit must be at first line activating before pulse (pulse) the no show internal circuit of static discharge; promptly eliminating too high voltage, and then reduce the destruction that the static discharge phenomenon is caused.But some are had the device that the light-emitting diode isoperimetric that has Presentation Function on movable press button mechanism or the panel is with the mechanism of slot, and exterior static still may have mechanism's slot on every side of slot to squeeze into internal circuit on every side by above these.See also Fig. 1.Fig. 1 is the schematic diagram of a mobile computer 10.As shown in the figure, mobile computer 10 has slot to exist between each movable press button mechanism of keyboard area, for example 20 slots that are between the two movable buttons.CD-ROM drive 30 schematic diagrames and for example shown in Figure 2.CD-ROM drive on panel, have some light-emitting diodes as 40 and the button of operating function as 50, light-emitting diode on these panels and button, have slot around it and between the housing of whole front panel, also form exterior static and easily squeeze into the breach of internal circuit, then become the high risk area that is subject to exterior static discharge injury corresponding to the below of those slots or near the circuit it.Therefore prevent the protection circuit of static discharge except on circuit, designing, another kind of in response to safeguard procedures be in the coating mode, the surface of circuit exposed parts is coated with aluminium foil or anti-high pressure adhesive tape (Mylar), make exterior static can't enter circuit inside fully, so just can not impact and damage circuit.As mobile computer movable press button mechanism such as keyboard, CD-ROM drive panel button or other as panel on slot around the light-emitting diode with a display func etc., its pairing circuit in below, the as easy as rolling off a log exactly exterior static that is subjected to is invaded and the zone destroyed by static discharge.Manyly in the known techniques coat, relevant assembly is caused damage to avoid the exterior static discharge with aluminium foil or anti-high pressure adhesive tape surface with exposed parts.Yet the surface with aluminium foil or anti-high pressure adhesive tape coating circuit exposed parts must be carried out with the manual mode of operation, time-consuming and make cost improve, and might can't intactly cover the scope that needs isolation because of artificial careless mistake, and make protection effect not cite or start a leak.
From the above, except design protection circuit on circuit, for have around movable press button mechanism or the light-emitting diode etc. and housing between have for the electronic installation of mechanism of slot, also need easily to be squeezed into by exterior static and discharge and cause the ruined characteristic of circuit by slot at it, provide relevant, aluminium foil or anti-high pressure adhesive tape are pasted the surface that is coated on the circuit exposed parts and need to expend many manpowers in the production process of known techniques for this reason in response to measure.A large amount of expending of manpower not only make this production process not have economic benefit, have also lowered the competitive advantage of this electronic installation in market, and the coating that artificial careless mistake is caused is imperfect, will make that more protection effect is affected.
Summary of the invention
Therefore main purpose of the present invention is to provide a kind of exterior static of preventing is damaged the circuit board of electronic building brick by the intrusion discharge of the slit on the housing electronic installation that has, to improve the problems referred to above.
According to claim of the present invention, be to disclose a kind of electronic installation that prevents the circuit board of exterior static discharge damage electronic building brick; It comprises a housing; And a circuit board, it comprises: an electronic building brick, be formed on this circuit board, and the periphery of this electronic building brick is corresponding to the slot on this housing; And an earthing member (grounding means), be formed on this circuit board and corresponding to the slot on this housing, be used for evacuating the static of the periphery of this electronic building brick.
Description of drawings
Fig. 1 is the schematic diagram of known mobile computer.
Fig. 2 is the schematic diagram of known CD-ROM drive.
Fig. 3 is the schematic diagram of an embodiment of CD-ROM drive circuit board of the present invention.
Symbol description:
10 mobile computers
20 slots
30 CD-ROM drives
40 light-emitting diodes
50 buttons
100 circuit boards
110, the projection of 120 buttons on circuit board
112,122 sensor circuits
114,124 through holes
130 circuit
140, the projection of 150 light-emitting diodes on circuit board
142,152 circuit of LED
144 earth connections
154 circuits
160 system's ground wires
171,172,173,174 earthing members
Embodiment
See also Fig. 3.Fig. 3 is circuit board 100 schematic diagrames of a preferred embodiment of the present invention.Circuit board 100 is the circuit board of a CD-ROM drive panel, and it is positioned at the dead astern of this CD-ROM drive panel.110 and 120 is two projections of movable button on circuit board 100 on this CD-ROM drive panel, also indicate this two movable button on the housing of CD-ROM drive panel around and the position of the slot between housing.112 and 122 are respectively the sensor circuit corresponding to the movable button under the 110 and 120 2 movable button projections, and when the movable button pressed on it, sensor circuit 112 and 122 can be sensed and activate the interlock circuit function; Line related is respectively via through hole (via) 114 and 124 other layer circuit that connect toward circuit board 100 in this example.130 is the circuit of certain other function.140 and 150 is the two light-emitting diodes projection on circuit board 100 on this CD-ROM drive panel, also indicate this two light-emitting diode on the CD-ROM drive panel around and the position of the slot between housing.142 and 152 are respectively the circuit corresponding to the light-emitting diode under the 140 and 150 2 light-emitting diode projections, and 144 is the earth connection of circuit 142, and 154 is one by through hole circuit 152 to be connected toward the circuit of other layer circuit of circuit boards 100.160 is the system's ground wire on the circuit board 100, and the housing that it is electrically connected to CD-ROM drive provides the system earth current potential.171,172,173 and 174 be earthing member proposed by the invention (grounding means), it is formed at respectively on the circuit board 100, and corresponding to around movable button under 110,120 2 movable buttons and 140, the 150 2 light-emitting diode projections and the light-emitting diode and under the slot between housing; Earthing member 171,172 and 174 all is connected in system's ground wire 160 and earthing member 173 is connected in the earth connection 144 of circuit 142; And the surface of earthing member 171,172,173 and 174 does not have anti-welding lacquer; make when exterior static is called in via these housing slots; can distinguish and attract with 174 earlier and by system's ground wire 160 and import system the earth (housing of CD-ROM drive), thereby can protect other circuit by high potential destruction that exterior static discharged by earthing member 171,172,173.
The present invention is when implementing, as shown in Figure 3, on the circuit board 100 distance predetermined distance d 1 corresponding to the aperture on this housing in, except earthing member, there are not other electronic building brick, control circuit or power circuit, and the controlling signal line of movable button or light-emitting diode must be under this module position, and with on the circuit board with respect to around this assembly with the distance at body clearance seam place also in this predetermined distance d more than 1, as being not less than d1 with circuit 124 distance around the button projection 120, and with button projection 120 apart from having only earthing member 172 within the d1.Similarly, on the circuit board 100 apart from not having other electronic building brick, control circuit or power circuit in earthing member 172 another predetermined distance d 2 yet, as the distance of the circuit 130 of certain other function on the circuit board 100 and earthing member 172 promptly greater than d2.This two qualification will guarantee more that exterior static is before being grounded the part absorption, can not destroy other electronic building brick, control circuit or power circuit, and other electronic building brick, control circuit or power circuit and earthing member keep certain distance can make that also the effect of pre-anti-electrostatic-discharge is more complete.Earthing member also can be not be directly connected in the housing of system's the earth such as electronic installation via line systematically when implementing, or is connected in the ground wire such as the earthing member among Fig. 3 173 of proximate circuitry; But and opposite side suspension joint such as earthing member 171,172 and 173 beyond its connected system ground wire or the system's the earth, or also can be connected with system's ground wire or system's the earth; It can be positioned at a side such as earthing member 171 and 172 of near the assembly the housing slot below again, also can be around this assembly as shown in Figure 3 earthing member 174 around circuit 152; Change and all can be formed on the circuit board and to evacuate equalization that the spirit of the static of electronic building brick periphery done with of the present invention in a word corresponding to the earthing member of the slot on the housing.Predetermined d1 can be one centimeter, and predetermined d2 can be the length between five Mills (mil) and 40 Mills.
Above illustrated embodiment has clearly demonstrated the present invention as how being formed on the circuit board and not having corresponding to the slot on the housing and surface the earthing member of anti-welding lacquer, see through system's ground wire or be directly connected to system's the earth and evacuate the static of electronic building brick periphery, and enumerated some variations different when implementing and may.The present invention can be applicable to as electronic installations such as CD-ROM drive, mobile computers, or all electronic installations of formed slot etc. between formed slot or luminescence component and housing between formed slot, movable press button mechanism and housing between having as movable press button mechanism on the housing.
Generally speaking, the invention provides and a kind ofly have the exterior static of preventing discharge and damage the electronic installation of the circuit board of circuit, it utilizes the surface not have the earthing member of anti-welding lacquer, the exterior static discharge of bleeding seeing through the slot on the housing damages before the internal circuit, and it is absorbed and the import system the earth.This can prevent exterior static discharge and the design that damages the circuit board of circuit is specially adapted to equal to have on the housing electronic installation as the slot between the slot between the slot between movable press button mechanism, movable press button mechanism and housing or luminescence component and housing as CD-ROM drive, mobile computer.The exterior static that prevents of the present invention is discharged and the board design of damage internal circuit, that has improved known techniques pastes metallized aluminum paillon foil or anti-high pressure adhesive tape in all consuming time, expensive of the circuit surface of exposed parts and the shortcoming of easily makeing mistakes with the manual mode of operation, and design of the present invention is to use the ground wire on the circuit board, so can save system design cost and factory-assembled problem.
The above only is preferred embodiment of the present invention, and all equalizations of being done according to the present patent application claim change and modify, and all should belong to the covering scope of patent of the present invention.
Claims (16)
1. electronic installation, it comprises:
One housing; And
One circuit board, it comprises:
One electronic building brick is formed on this circuit board, and the periphery of this electronic building brick is corresponding to the slot on this housing; And
One earthing member is formed on this circuit board and corresponding to the slot on this housing, is used for evacuating the static of the periphery of this electronic building brick.
2. electronic installation according to claim 1, wherein this circuit board comprises system's ground wire in addition, is formed on this circuit board, is used for ground connection.
3. electronic installation according to claim 2, wherein this system's ground wire is to be connected in this housing.
4. electronic installation according to claim 2, wherein this earthing member is to be used for the static of the periphery of this electronic building brick is directed at this system's ground wire or this housing.
5. electronic installation according to claim 2, wherein one of this earthing member end is to be connected in this system's ground wire or this housing, the other end is a suspension joint.
6. electronic installation according to claim 2, wherein the two ends of this earthing member all are to be connected in this system's ground wire or this housing.
7. electronic installation according to claim 2, wherein an end of this earthing member is to be connected in this system's ground wire or this housing, the other end is to be connected in this electronic building brick.
8. electronic installation according to claim 1, wherein this earthing member is to be formed at the surface of this circuit board but not to be embedded in wherein.
9. electronic installation according to claim 1, wherein the surface of this earthing member does not have anti-welding lacquer.
10. electronic installation according to claim 1, wherein the slot on this housing is to be the slot between the slot between the slot between movable press button mechanism, movable press button mechanism and housing or luminescence component and housing.
11. electronic installation according to claim 1 is a mobile computer.
12. electronic installation according to claim 1 is a CD-ROM drive.
13. electronic installation according to claim 1, wherein on this circuit board the distance one first preset distance corresponding to the aperture on this housing in, except this earthing member, do not have other electronic building brick, control circuit or power circuit.
14. electronic installation according to claim 13, wherein this first preset distance is one centimeter.
15. electronic installation according to claim 1, wherein on this circuit board apart from not having other electronic building brick, control circuit or power circuit in this earthing member one second preset distance.
16. electronic installation according to claim 15, wherein this second preset distance is the distance between five Mills and 40 Mills.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2003101136532A CN100334923C (en) | 2003-11-17 | 2003-11-17 | Electron device having anti static discharging circuit board |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2003101136532A CN100334923C (en) | 2003-11-17 | 2003-11-17 | Electron device having anti static discharging circuit board |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1620218A CN1620218A (en) | 2005-05-25 |
| CN100334923C true CN100334923C (en) | 2007-08-29 |
Family
ID=34760002
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNB2003101136532A Expired - Fee Related CN100334923C (en) | 2003-11-17 | 2003-11-17 | Electron device having anti static discharging circuit board |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN100334923C (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102231768B (en) * | 2010-07-30 | 2014-06-25 | 惠州Tcl移动通信有限公司 | Electro-static protection circuit of mobile terminal and mobile terminal provided with same |
| CN102419781B (en) * | 2010-09-28 | 2014-03-19 | 英业达股份有限公司 | Method for paving conductive gasket |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2243129Y (en) * | 1995-10-11 | 1996-12-18 | 鸿海精密工业股份有限公司 | Earthing device of connector |
| US5933718A (en) * | 1997-10-23 | 1999-08-03 | International Business Machines Corporation | Method for electrostatic discharge protection through electric field emission |
| CN1310578A (en) * | 2000-02-22 | 2001-08-29 | 摩托罗拉公司 | Electrostatic discharge protection device for high-density printed circuit board |
-
2003
- 2003-11-17 CN CNB2003101136532A patent/CN100334923C/en not_active Expired - Fee Related
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2243129Y (en) * | 1995-10-11 | 1996-12-18 | 鸿海精密工业股份有限公司 | Earthing device of connector |
| US5933718A (en) * | 1997-10-23 | 1999-08-03 | International Business Machines Corporation | Method for electrostatic discharge protection through electric field emission |
| CN1310578A (en) * | 2000-02-22 | 2001-08-29 | 摩托罗拉公司 | Electrostatic discharge protection device for high-density printed circuit board |
Also Published As
| Publication number | Publication date |
|---|---|
| CN1620218A (en) | 2005-05-25 |
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| C06 | Publication | ||
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| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| PP01 | Preservation of patent right |
Effective date of registration: 20060925 Pledge (preservation): Preservation |
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| PP01 | Preservation of patent right |
Effective date of registration: 20070325 Pledge (preservation): Preservation |
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| PP01 | Preservation of patent right | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| EE01 | Entry into force of recordation of patent licensing contract |
Assignee: Compal Electronics Technology (Kunshan) Co., Ltd. Assignor: Compal Electronics Inc. Contract fulfillment period: 2008.3.11 to 2013.3.10 Contract record no.: 2009990000528 Denomination of invention: Electron device having anti static discharging circuit board Granted publication date: 20070829 License type: Exclusive license Record date: 20090519 |
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| LIC | Patent licence contract for exploitation submitted for record |
Free format text: EXCLUSIVE LICENSE; TIME LIMIT OF IMPLEMENTING CONTACT: 2008.3.11 TO 2013.3.10; CHANGE OF CONTRACT Name of requester: RENBAO ELECTRONICTECHNOLOGY(KUNSHAN)CO.,LTD. Effective date: 20090519 |
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| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20070829 Termination date: 20141117 |
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| EXPY | Termination of patent right or utility model |