TWI224483B - Electrostatic discharge protected electronic apparatus - Google Patents

Abstract

An electronic apparatus protecting electrostatic discharge (ESD). The electronic apparatus includes a housing and a circuit board, which includes an electronic device formed on the circuit board and of which the border corresponding to a gap in the housing, and a grounding-means formed on the circuit board and corresponding to a gap in the housing, which is utilized to evacuate static electricity near the electronic device.

Description

1224483 V. Description of the invention (1) ~~~~ 1 ~~~~ [Technical Field] The present invention provides an electronic device, especially an electronic device with an external static electricity which can prevent damage to a circuit board. [Previous technology] Static electricity (Static Electrid ^ 5 Friction of objects of different materials may generate static electricity. The momentary high-voltage discharge generated by the external ^ contact with the circuit will affect the circuit's normality, and even cause an irreversible air mine f ft❿ The production of the integrated product, the electrostatic discharge IΓ II, f, the rated current is relatively small, it is not suitable for the integrated circuit pair | JJf body pair: ϊϋ ϊϋ The electronic device of the integrated circuit can not operate.] 5 玄 置 静静Electrical protection measures have become an important issue 2 ^ This electrical J τ ^ ^ ^ ^ ^, 0 ^ ^ ^ ^ ^) from £ 疋 in the internal circuit and 1/0 pin ^

"A protective circuit is provided between the ten outer terminals." The I 4 circuit must be discharged. How can the two static electricity be transported easily? In the same way, the external transmission structure is often installed? It must be 1224483. V. Description of the invention (2) ———--_— The pulse of electrostatic discharge (fpulse) is quickly eliminated before reaching the internal circuit, thereby reducing the damage of electrostatic discharge. However, for some mechanisms with gaps around the movable key mechanism or light-emitting diodes with the function of surface two geotechnical indicators, the static electricity of the Department of Taxation may be passed from the above gapped mechanisms ^ Circuit. See Figure 1. The first picture is the drawing of the gap around the pen. As the stomach #, the notebook computer 10 in the keyboard area

Hi is also a schematic diagram of the optical disc drive 30 shown in FIG. Light == H ^ There are some light-emitting diodes such as 40 and buttons for operating functions such as 5, and light-emitting diodes and buttons on the dagger panel. There is a gap between the surrounding H 'and it also forms external static electricity. The internal circuit g 2 double body J is in those high-risk areas of the gap q electrostatic discharge injury. Therefore, in addition to the protection circuit for lightning discharge, another reason is to prevent the static twist on the design to prevent static ^ type 'will t ... (My 1 ar t-^ ^ # t ^ ^ ^ ^ ^ ^ For Lei Yi, Shizhong A key, the disc player 板 board press ^ and compile. If a notebook computer press * ^ ^ ^ ^ ^ ^ ί JJ JI ^ J ^ ^ φ ^ circuit, it is extremely easy to total 154 The corresponding area below the surrounding gap. In the conventional technology, 5 ^ [:! static electricity t is covered by the area destroyed by electrostatic discharge, so as to avoid the outer sheet or anti-stress tape to cover the exposed part with The falling sheet and the anti-Gu electrical discharge cause damage to the related components. However, the surface of the exposed part of the circuit covered by the anti-backing tape every month must be 1224483 ———_ 5. Description of the invention (3) ~ ~ ~ _____ — ___ ^ ί Manual approach, stupid 眭 ~~ I is artificially negligent and cannot be used ☆ 敕 ^ | It is cost-effective, and there is something to be done || The protection effect is not outstanding 戍 / 70 is also covering the area that needs to be isolated , 'Because of a loophole in the meaning of the heart, the prevention can be known from the above. In addition to the design of the protective circuit on the road, The electronic device ^ ^ has a diode between the periphery of the photodiode and the case and the discharge causes the circuit to be broken. == It is easy to be hit by the gap by external static electricity. This is a production of conventional technology. Related countermeasures, and high-voltage resistant tapes are used to coat the circuit. $ ^ It takes a lot of manpower to plan the foil or ^ f ^ ^ ^ # 1¾ ί! Ί J ^ ^ ^ ^ ^ ° A * Λ ^ J 11 ^ ir # t ^ ^ # ^, ^ A ^ m ^ m it ^ is complete, and will cause the protection to suffer ^ [Content] Therefore, the main purpose of the present invention is to provide a circuit in which a gap in the case invades the discharge and damages the electronic component circuit The electronic layout of the board is used to improve the above problems. Y ^ 丨 According to the patent application for printing of the present invention, it is disclosed ^ an electronic device that prevents external electrostatic discharge from damaging the circuit board of the electronic component; A circuit board including: an electronic component formed on the circuit board, a periphery of the electronic component corresponding to a gap on the housing; and a ground

Page 8 1224483 V. Description of the invention (4) One by one (grounding means) are formed on the circuit board and correspond to the gaps on the casing to dissipate static electricity around the electronic component. [Implementation method] Refer to Figure 2. FIG. 2 is a diagram of a circuit board 100 according to a preferred embodiment of the present invention. The circuit board 100 is a circuit board of an optical disc drive panel, which is located directly behind the optical disc drive panel. 11 〇 and 丨 2 0 are the projections of the two movable buttons on the panel of the optical disc drive on the circuit board 100, and the gaps between the two movable keys on the casing of the optical disc panel and the gap between the casing are also marked. position. " 2 and 1 22 are the corresponding U.S. U-type pushbuttons; the circuits 1 1 2 and 1 2 2 will be sensed, and the opening and closing circuits will pass through the through holes (layer circuit. 1 3 0 is a certain outer panel). The second light emitting diode on the front panel of the disc player is placed between the periphery of the two light emitting diodes and the shell. 142 and 152 are circuits corresponding to the light emitting diodes of the Π class, 144 is the ground line of the circuit 142, and 154 is A circuit connecting the circuit 52 to the other layers of the circuit board 100 through the through hole. 160 is the system ground on the circuit board 1000, which is electrically connected to the optical disc drive's casing to provide a system ground potential 1 7 1, 17 2, 1 7 3, and 1 74 are the grounding elements (gr undundingmeans) proposed by the present invention, which are formed on the circuit board 100 respectively, and correspond to 11 〇, 1 2 0 Two movable keys and 1 4 〇, 1 5 〇

1224483 V. Description of the invention (5) — The movable keys to which the light emitting diode projection belongs and the gap between the surrounding of the light emitting diode and the housing; the grounding parts i 71, 172 and 1 74 are all connected to the system ground 1 60 and the grounding piece 1 73 are connected to the grounding wire 144 of the circuit 142; and the surfaces of the grounding pieces 17, 172, 173, and 174 are not provided with a solder resist paint, so that when external static electricity comes in through these gaps in the housing, the It is attracted by the grounding members 1 / Π, 172, 173, and 174 and is introduced into the system ground (the case of the optical disc drive) through the system ground wire 160, so that other circuits can be protected from being destroyed by the high potential released by external static electricity.

When it is implemented, as shown in Fig. 3, the distance on the circuit board 100 corresponds to a predetermined distance on the gap on the housing ^ _ electronic components, control identification ^ The control signal line of a polar body must be on the component Position your board ^ above the predetermined distance d 1 from the tail circumference of the component. If the edge i is less than dl, and the same as the key f, the circuit board 1

There are other electronic components, control like I

The circuit of some other function 130 and ground ^ Limitation ^: It will more ensure that the external static electricity will not damage other electronic it parts, control lines or power lines before being absorbed by the grounding parts, and other electronic components, control lines, or Keeping a certain distance between the power line and the grounding part can also make the effect of preventing electrostatic discharge more complete. During implementation, the grounding element can also be directly connected to the system ground, such as the housing of an electronic device, or to an adjacent device without going through the system ground wire.

1224483 V. Description of the invention (6) ~~ The ground wire near the circuit is shown as the grounding piece 173 in Figure 3. The ground wire connected to the system ground wire or the other side of the system ground can be floated like a grounding piece 1 7 1, 1 7 2 and 1 7 3 ′ may also be connected to the system ground or system ground; and it may be located on one side of the component near the bottom of the housing, such as a grounding piece, 7 1 and 1 7 2, or it may surround the component. The surroundings are as shown in the grounding piece shown in Figure 3 and the surrounding circuit 1 5 2; in short, according to the present invention, the grounding piece formed on the circuit board and corresponding to the gap on the housing is used to evade static electricity around the electronic component. Equality of the spirit can be changed to the north. The predetermined dl may be one centimeter, and the predetermined d 2 may be a length between five mils (m i 1) and forty mils. The above-mentioned embodiments clearly illustrate how the present invention can be applied to the system ground wire or directly connected to the system's large ice moon electricity through the system ground formed on the circuit board and corresponding to the gap on the device. For example, the square case of the optical disc drive and the notebook computer has electronic devices such as the shape of the movable key mechanism, the gap formed between the mechanism and the case, or the gap formed between the light-emitting element and the case. In other words, the present invention provides an electronic device having a circuit board that prevents external electrostatic discharge from damaging the circuit board. The electronic device utilizes external static electricity that does not have a solder resist on the surface and leaks through a gap in the housing. The discharge damages the static gangster, absorbs it, and leads it to the system ground. The design of the circuit board which can prevent the external electric discharge from damaging the circuit is particularly suitable for such as optical discs

Page 1224483 V. Description of the invention (7) The case and the notebook computer are equal to the gap between the movable key mechanism, the movable key mechanism and the shell: the gap between the body, or the gap between the light-emitting element and the shell. Gap electronics. The circuit board design of the present invention to prevent external electrostatic discharge from damaging the internal circuit improves the time-consuming, high cost and high cost of the conventional technique of manually coating aluminum foil or anti-high-pressure tape on the exposed surface of the circuit. It is prone to errors, and the design of the present invention uses a ground wire on the circuit board, which can save system design costs and factory assembly problems. The above description is only a preferred embodiment of the present invention, and any equivalent changes and modifications made in accordance with the scope of patent application of the present invention shall fall within the scope of the patent of the present invention. 1224483 Simple illustration of the diagram Simple illustration of the diagram Figure 1 is a schematic diagram of a conventional notebook computer. Figure 2 is a schematic diagram of a conventional optical disc drive. FIG. 3 is a schematic diagram of an embodiment of an optical disc drive circuit board according to the present invention. Explanation of symbols of the drawings 10 Notebook computer 20 Slot 30 Optical disc drive 40 Light-emitting diode 5 0 Button 10 0 Circuit board 110, 120 Projection of the button on the circuit board 112, 122 Induction circuit 114, 124 Through hole 130 Circuit 140, 150 Projection of LED on the circuit board 142, 152 LED circuit 144 Ground wire 154 Line 160 System ground wire 17 172, 173, 174 Grounding parts

Page 13

Claims (1)

1224483 6. Scope of patent application 1. An electronic device including: a casing; and a circuit board including: an electronic component formed on the circuit board, and a periphery of the electronic component corresponds to the casing A gap; and a grounding means, formed on the circuit board and corresponding to the gap on the casing, for evacuating static electricity around the electronic component. 2. For the electronic device according to item 1 of the patent application, wherein the circuit board further includes a system ground wire formed on the circuit board for grounding. 3 · If the electronic device in the scope of the patent application, the system ground wire is connected to the obfuscated body. 4. If the electronic device in the scope of the patent application, the grounding piece is used to surround the electronic component. The static electricity is conducted to the system ground or the case. 5. For the electronic device according to item 2 of the patent application scope, one end of the grounding member is connected to the system ground or the casing, and the other end is floating. 6. For the electronic device in the second scope of the patent application, both ends of the grounding member are connected to the system ground or the casing. 7. For an electronic device in accordance with the scope of patent application, wherein one of the grounding members Page 14 1224483 VI. Scope of patent application The end is connected to the system ground or the case, and the other end is connected to the electronic component. 8. For the electronic device according to item 1 of the patent application scope, wherein the grounding member is formed on the surface of the circuit board instead of being buried therein. 9. For the electronic device in the scope of patent application item 1, the surface of the grounding member does not have solder resist paint. 10. The electronic device according to item 1 of the scope of patent application, wherein the gap on the casing is the gap between the movable key mechanism, the gap between the movable key mechanism and the case, or the gap between the light emitting element and the case. Gap r 1 1. If the electronic device of the scope of the patent application is No. 1, it is a notebook computer '12. If the electronic device of the scope of the patent application No. 1, is an optical disc drive. 1 3. The electronic device according to item 1 of the scope of patent application, wherein the distance on the circuit board corresponds to a first predetermined distance of a slot on the casing, and there are no other electronic components or control circuits except the grounding member. Or power lines. 14. The electronic device as claimed in claim 13, wherein the first predetermined Page 15 1224483 6. Scope of patent application The distance is one centimeter. The board Γ ^ ΒΓ on the item of the installation element ^ 6- has other components in it. M. 0 is the distance from the second range. Li Yilu special line, please ask the source A to receive electricity or the b. Off the road lb distance control im im c c. Van Leli special five please apply in the application such as • off 6 1 distance set in the second place Child Item 5 隹 0 Secret to the Fourteenth Page 16