KR100623866B1 - Print Circuit Board to Improvement Discharge Induction Function of Static Electricity and Mobile Communication Terminal with The Same - Google Patents

Abstract

The present invention includes the electrostatic discharge inducing means to form a via hole and a spark gap in the inner layer of the printed circuit board consisting of a plurality of layers, to first remove the static electricity from the electrostatic discharge inducing means provided on the upper layer of the printed circuit board Therefore, the remaining static electricity is removed secondarily from the inner layer so that the complete static elimination can cope with the strong static electricity having a large energy.

In addition, even when it is difficult to install the electrostatic discharge inducing means in the upper layer, it is possible to cope with difficulty without the removal of static electricity, and also the space and area for the installation of the electrostatic discharge inducing means is secured in the upper layer to facilitate the installation of new additional parts. It is.

According to the present invention, at least one electrostatic discharge induction pad having a predetermined length and width is disposed on the inner layer surface so as to have a via hole and a spark gap, thereby improving the electrostatic discharge induction function to induce discharge against the static electricity. A circuit board is provided.

On the other hand, at least one electrostatic discharge induction pad having a predetermined length and width on the surface of the inner layer is close to have a via hole and a spark gap, the printed circuit board with improved electrostatic discharge induction function to induce the discharge to the static electricity There is provided a mobile communication terminal comprising a.

Electrostatic, induction, discharge, terminal, printing

Description

Printed Circuit Board with Improved Electrostatic Discharge Induction Function and Mobile Communication Terminal With Them {Print Circuit Board to Improvement Discharge Induction Function of Static Electricity and Mobile Communication Terminal with The Same}             

1 is a cross-sectional view schematically showing the interior of a commonly used mobile communication terminal

Figure 2 is a front sectional view showing in detail the installation of the printed circuit board and the authentication member in FIG.

3 is a plan view partially illustrating an upper outer layer of a printed circuit board according to another exemplary embodiment of FIG. 2;

FIG. 4 is a front sectional view showing a state in which an electrostatic discharge induction pad is installed in an inner layer according to Embodiment 1 of the present invention

FIG. 5 is a front sectional view of Embodiment 2 of the present invention, in which an electrostatic discharge induction pad and an electrostatic discharge induction element are installed in an inner layer and an upper layer.

FIG. 6 is a cross-sectional front view showing a third embodiment of the present invention in which an electrostatic discharge induction pad is installed on an upper layer and a lower layer, respectively.

<Explanation of symbols for the main parts of the drawings>

10: mobile communication terminal 12: key

14: keypad 16: metal dome

18: printed circuit board 20: authentication member

22: challenge ball 24: outer layer

26: inner layer 28, 30: signal line

32: via hole 34: conductor

36, 50, 52, 54: electrostatic discharge inductive element 38: ground portion

40: electrostatic discharge induction pad

The present invention relates to a printed circuit board having an improved electrostatic discharge induction function and a mobile communication terminal having the same. More particularly, the present invention includes electrostatic discharge inducing means for forming a via hole and a spark gap in an inner layer of the printed circuit board. It is to cope with the strong static electricity having a large energy by removing the residual static electricity that could not be removed by the electrostatic discharge induction means installed in the upper layer.

In addition, even if the electrostatic discharge inducing means is not installed on the upper layer, the electrostatic discharge inducing function remains intact, and also secures the installation space and area in the upper layer where the electrostatic discharge inducing means is installed to facilitate the installation of additional parts to which new functions are assigned. will be.

In general, the mobile communication terminal 10 illustrated in FIG. 1 includes a keypad 14 having a plurality of keys 12 arranged thereon, and a corresponding function thereof operated by pressing the keys 12. A printed circuit board 18 having a metal dome 16 is included. In particular, the authentication member 20 made of a conductor is provided to receive the authentication for the use of the mobile communication terminal 10 to recognize the fingerprint of the person in the center of the keypad (14). And the conductive ball 22 provided in the authentication member 20 is placed to be in contact with the upper surface of the printed circuit board 10.

2 is an enlarged view illustrating the signal connection between the printed circuit board and the authentication member in more detail.

First, the printed circuit board 18 is integrally formed by stacking the outer layers 24 disposed on the upper and lower portions, and one or more inner layers 26 therebetween.

In addition, the upper outer layer 24 and the inner layer 26 of the printed circuit board 18 are provided with signal lines 28 and 30 along the surface, respectively, and via holes 32 between the signal lines 28 and 30. ) Is formed. The conductor 34 coated along the inner circumferential surface of the via hole 32 is connected to the signal lines 28 and 30.

In addition, a signal line 28 provided along the surface circumference of the via hole 32 is electrically connected to an electrostatic discharge inductive element 36 which is commonly used to be provided on the surface of the upper outer layer 24. The discharge induction element 36 is finally connected to a ground portion 38 having a small frontal area on one side of the upper outer layer 24.

Figure 3 is a plan view showing a state in which the electrostatic discharge induction pad is provided on the upper outer layer surface of the printed circuit board in another conventional embodiment.

First, a ground portion 38 having a predetermined area is provided at one side of the upper outer layer 24 of the printed circuit board 10, and the static electricity is electrically connected to the ground portion 38 with a predetermined width and length. The discharge induction pad 40 is installed in a state in which a spark gap is formed in the outer signal line 28 of the via hole 32.

Although the drawings described above have eliminated unnecessary configuration for the purpose of description of the prior art, in fact, the outer layer 24 and the inner layer 26 of the printed circuit board 18 have various components and signal lines for performing a corresponding function ( 28 and 30 and a plurality of corresponding via holes 32 are formed to form a very complicated structure. For reference, the signal lines 28 and 30 and the electrostatic discharge induction pad 40 are coated by a printing method.

Therefore, as shown in the accompanying drawings, FIGS. 1 and 2, when the user comes into close contact with the authentication member 20, the same fingerprint as the user's already input fingerprint is received to receive an authentication procedure for the use of the mobile communication terminal 10. The signal for this flows along the signal line 28 of the upper outer layer 24 through the conductor 34 of the via hole 32 to the signal line 30 provided in the inner layer 26.

 The signal flowing to the signal line 30 is supplied to a component (not shown) connected to it and contrasted with the input fingerprint, thereby determining whether to use the mobile communication terminal 10.

At this time, the static electricity is applied by the user's body or electrical influence through the authentication member 20, if the static electricity is a strong static electricity (for example several KV ~ several tens of KV) having more energy beyond the allowable range The electrostatic discharge inductive element 36, which is electrically connected to the signal line 28 of the outer layer 24, causes the static electricity to rapidly discharge to flow to the grounding part 38 to prevent component damage due to electric shock in advance. do.

Meanwhile, as shown in FIG. 3, when a strong static electricity (for example, several KV to several tens of KV) flows from the authentication member 20 having more energy outside the allowable range of the static electricity, the via hole ( In the signal line 28 of the upper layer 24 provided along the surface circumference of the 32, an electric shock is generated momentarily in the direction of the electrostatic discharge induction pad 40 to flow to the ground portion 38 to remove static electricity. Done.

However, more powerful static electricity beyond the allowable range of static electricity cannot be induced to ground quickly only by the induction discharge of the electrostatic discharge induction element 36 and the electric shock of the discharge induction pad 40, and thus static electricity remains. Residual static electricity flows into the signal line 30, thereby impairing the function of the component.

On the other hand, when the corresponding component is additionally installed in the upper outer layer 24 according to the addition of various functions of the mobile communication terminal 10, first, the installation space and area for the electrostatic discharge induction device 36 or the discharge induction pad 40 are increased. There is a problem that the lack of the addition of a new component or the addition of the static electricity removal function is not given by the added parts to deteriorate the reliability of the mobile communication terminal (10).

Accordingly, an object of the present invention is to provide an electrostatic discharge induction function on the outer layer and the inner layer of a printed circuit board to completely remove strong static electricity.

In addition, even if the electrostatic discharge induction function is not provided in the upper layer of the printed circuit board, it is possible to completely remove the strong static electricity from the inner layer, and also to secure space and area in the upper layer to facilitate the addition of parts for new functions. It has a different purpose.

The present invention for achieving the above object, the at least one electrostatic discharge induction pad having a predetermined length and width on the inner layer surface is approached to have a via hole and a spark gap, so that discharge is induced against the static electricity The technical characteristics of the printed circuit board is improved electrostatic discharge induction function.

In addition, the electrostatic discharge induction device provided on the surface of the outer layer is electrically connected to the signal line of the outer layer has a technical feature in the improved electrostatic discharge induction function is installed to induce discharge.

In addition, a ground portion having a predetermined area is provided on one surface of the outer layer, and the electrostatic discharge induction function in which one or more electrostatic discharge induction pads electrically connected along the surface of the ground portion is provided to be close to the via hole is improved. Printed circuit boards have technical features.

In addition, at least one ground portion having a predetermined area is provided on a surface of the inner layer, and at least one electrostatic discharge induction pad connected to the ground portion is in close proximity to a via hole, thereby inducing a discharge of the electrostatic discharge. Technical features of a mobile communication terminal including a printed circuit board with improved functionality.

In addition, the technical features of the mobile communication terminal including a printed circuit board having an improved electrostatic discharge induction function is installed so that the electrostatic discharge induction device provided on the surface of the outer layer is electrically connected to the signal line of the outer layer to induce discharge. There is this.

In addition, a ground portion having a predetermined area is provided on one surface of the outer layer, and the electrostatic discharge induction function in which one or more electrostatic discharge induction pads electrically connected along the surface of the ground portion is provided to be close to the via hole is improved. Technical features of a mobile communication terminal including a printed circuit board.

Next, a detailed configuration of the present invention will be described with reference to the drawings schematically showing an embodiment of the present invention.

Example 1

Embodiment 1 has a structure in which an electrostatic discharge induction pad is installed on an inner layer of a printed circuit board.

FIG. 4 is a front sectional view showing the structure in which the electrostatic discharge induction pad is provided on the inner layer of the printed circuit board as the first embodiment of the present invention.

In the printed circuit board and the mobile communication terminal having the improved electrostatic discharge induction function of the present invention, the electrostatic discharge induction device 36 or the electrostatic induction pad 40 on the upper outer layer 24 of the printed circuit board 18. ) Is impossible to install, to remove static electricity from the inner layer (26).

In Embodiment 1 shown in FIG. 4, an electrostatic discharge induction pad 50 having a predetermined width and length is provided on one of the inner layers 26 of the plurality of inner layers 26 constituting the printed circuit board 18. Is disposed close to the via hole 32 to form an optimum spark gap.

Therefore, when static electricity applied from the authentication member 20 illustrated in FIGS. 1 and 4 flows to the conductor 34 of the lower hole 32, the electrostatic discharge induction provided in the inner layer 26 is also provided. Electrical shock is generated by the pad 50 to remove static electricity.

However, the electrostatic induction pad 50 of the present invention is not limited to a structure that is specifically installed on any one inner layer 26 as shown in the accompanying drawings, and may be installed on all layers, respectively. At the same time, one or more electrostatic discharge induction pads 50 may be provided as necessary to cope with strong static electricity.

Although the present invention has been described as a printed circuit board 10 included in the mobile communication terminal 10, this is for illustrative purposes only and is not limited or limited, and any printed circuit board 10 is installed. May be included.

Example 2

In the above-described Example 1, the electrostatic discharge induction pad is installed on the inner layer to solve the case where it is difficult to construct the electrostatic discharge induction function on the upper layer, and the second embodiment is provided with the electrostatic discharge induction function on the upper outer layer. In addition, the inner layer has a structure in which an electrostatic discharge induction pad is installed.

FIG. 5 is a front sectional view of Embodiment 2 of the present invention, in which an electrostatic discharge induction pad is installed in an inner layer and an electrostatic discharge induction device is installed in an outer layer.

In the embodiment shown in FIG. 5, the electrostatic discharge induction element 36 is energized from the upper layer 24 signal line 28 provided along the surface circumference of the via hole 32 and connected to the final ground portion 38. .

On the surface of the inner layer 26, an electrostatic discharge induction pad 52 having the same structure as that of the first embodiment is provided close to the via hole 32 so as to form a spark gap.

Therefore, when strong static electricity (for example, several KV to several tens of KV) is applied to the signal line 28 of the upper outer layer 24, the electrostatic discharge inductive element 36 connected to the signal line 28 is first-order. Induce discharge and remove.

In addition, when static electricity that has not been removed by the electrostatic discharge induction device 36 flows along the conductor 34 of the via hole 32, electrical shock occurs in the electrostatic discharge induction pad 52 of the inner layer 26. While removing the secondary discharge by induction.

The other configuration of the second embodiment is the same as the prior art and the first embodiment described above, the same member number is used and other description is omitted.

Example 3

In the above-described embodiment 2, the electrostatic discharge induction device is installed on the outer layer, the electrostatic discharge induction pad is installed on the inner layer, and the third embodiment has a structure in which the electrostatic discharge induction pads are installed on the outer layer and the inner layer, respectively.

6 is a front sectional view illustrating a state in which an electrostatic discharge induction pad is installed in an outer layer and an electrostatic discharge induction pad in an inner layer according to Embodiment 3 of the present invention.

In the embodiment shown in FIG. 6, a ground portion 38 having a predetermined area is formed on one side of the upper outer layer 24 of the printed circuit board 18, and the electrostatic discharge is electrically connected from the ground portion 38. The induction pad 40 is provided in the upper outer layer 24 to form a spark gap with the signal line 28 provided along the circumference of the via hole 32.

On the surface of the inner layer 26, an electrostatic discharge induction pad 54 having the same structure as that of the first embodiment is provided close to the via hole 32 so as to form a spark gap.

In the embodiment of the present invention, a structure that can reduce the burden of the expensive electrostatic discharge induction element 36 while completely removing the static electricity is proposed.

Therefore, when strong static electricity (for example, several KVs to several tens of KVs) is applied to the signal line 28 of the upper outer layer 24, electrical shock is generated from the signal line 28 to the electrostatic discharge induction pad 40. Static electricity is removed by the primary discharge induction, and when the remaining static electricity flows along the conductor 34 of the via hole 32, the electrostatic discharge pad 52 of the inner layer 26 is electrically discharged. As a result, secondary discharge is induced to remove the static electricity remaining.

 Since the other structure of the third embodiment and the connection structure of the authentication device is the same as the prior art and the first embodiment described above, the same member number is used, and the other description is omitted.

In the above, the preferred embodiment of the present invention has been illustrated and described. However, the present invention is not limited to the above-described embodiments, and various structures that can be modified by those skilled in the art will be included without departing from the gist of the present invention.

As described above, the present invention provides electrostatic discharge induction functions to the outer layer and the inner layer of the printed circuit board to completely remove the strong static electricity having a large energy, thereby preventing damage to the function of the component due to the electric shock, thereby enabling mobile communication. There is an effect that can increase the reliability of the terminal.

In addition, even if it is difficult to install the electrostatic discharge inducing means in the upper layer has an effect that can be coped with difficulty without the electrostatic removal.

In addition, the installation space and the area of the electrostatic discharge induction device and the electrostatic discharge induction pad are secured in the upper layer, so that the installation of additional parts is easy, and thus, a new function can be expected to be given to the mobile communication terminal.

Claims (6)

Signal lines are provided on surfaces of the outer layer and the inner layer, each of which is composed of several layers; In the printed circuit board in which via holes are formed for electrical connection between the corresponding signal lines, One or more electrostatic discharge induction pads having a predetermined length and width are placed close to the via hole and the spark gap on the surface of the inner layer, so that the electrostatic discharge induction function is improved. Printed circuit board. The method of claim 1, Electrostatic discharge induction function provided on the surface of the outer layer is electrically connected to the signal line of the outer layer is installed to improve the electrostatic discharge induction function, characterized in that installed to induce discharge. The method of claim 1, A ground portion having a predetermined area is provided on one surface of the outer layer, and at least one electrostatic discharge induction pad electrically connected along the surface of the ground portion is provided to be in close proximity to the via hole. This improved printed circuit board. A main body portion having a plurality of keys for function operation, a screen portion coupled to the main body portion to display an operation function of a key, and a power supply portion for supplying power; In the mobile communication terminal having a printed circuit board in the body portion having a signal line is provided on the surface of the outer layer and the inner layer consisting of a plurality of layers to form a via hole for electrical connection between the corresponding signal line, One or more electrostatic discharge induction pads having a predetermined length and width on the inner layer surface are proximate to have a via hole and a spark gap, and include a printed circuit board having an improved electrostatic discharge induction function to induce discharge against the static electricity. Mobile communication terminal, characterized in that. The method of claim 4, wherein And a printed circuit board having an induction function for electrostatic discharge, characterized in that the electrostatic discharge induction device provided on the surface of the outer layer is electrically connected to the signal line of the outer layer and installed to induce discharge. Mobile communication terminal. The method of claim 4, wherein A ground portion having a predetermined area is provided on one surface of the outer layer, and at least one electrostatic discharge induction pad electrically connected along the ground portion of the ground portion is provided to be in close proximity to the via hole. Mobile communication terminal comprising a printed circuit board provided.

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