TWI396489B - Flexible printed circuit and method for making same - Google Patents

Description

Flexible printed circuit and method of manufacturing same

The present invention relates to a flexible printed circuit, and more particularly to a flexible printed circuit capable of increasing ground contact and a method of fabricating the same.

Flexible printed circuit (FPC) is widely used in mobile phones, personal digital assistants (PDAs) due to its light weight, thin thickness, easy assembly after folding, and the ability to withstand multiple dynamic windings. And other types of electronic devices.

As the volume of electronic devices is gradually reduced, the space for installing various electronic components is becoming more and more limited, and the functions of electronic devices are becoming more and more, which inevitably enables installation in electronic devices. Various electronic components are becoming more and more integrated. When the electronic device is in operation, the electronic components and circuits installed in the electronic device often generate an electrostatic discharge (ESD). If the electrostatic discharge generated by the above is not effectively released and grounded, the electronic components will interfere and damage each other, which seriously affects the normal operation of the electronic device or shortens and damages the service life of each electronic component. In order to avoid damage to various electronic components in the electronic device by electrostatic discharge, the conventional method is to ground the generated static electricity by a predetermined grounding device, for example, the generated static electricity is printed by the flexible printing. The line is introduced into the board and then grounded.

However, limited by the size limitation of the connector at the two ends of the flexible printed circuit, the flexible printed circuit cannot provide more grounding pins, that is, the flexible printed circuit cannot provide a comparison. A large area of ground contact is provided so that the electrostatic discharge generated in each electronic component and circuit is quickly and completely grounded by the flexible printed circuit.

In view of this, it is necessary to provide a flexible printed circuit that can effectively increase the ground contact area.

It is also necessary to provide a method of manufacturing the flexible printed circuit.

A flexible printed circuit includes a main body, the main body includes a first connecting end, a belt body and a second connecting end; the first connecting end and the second connecting end are respectively located at opposite ends of the strip body And a first connector and a second connector are respectively disposed on the first connecting end and the second connecting end; the plurality of layer lines including the grounding line are pre-configured in the strip body, the first connector and The second connector is electrically connected to each other by a line disposed inside the belt body portion; the plurality of via holes are formed through the strip body portion, and the flexible printed circuit further includes at least one ground layer disposed on the body The ground layer is electrically connected to the ground line in the strip body through the via hole, the ground layer includes a bonding portion and two extension portions, and the bonding portion is attached to the surface of the body, The extension portion is formed by bending outwardly from the two ends of the bonding layer adjacent to the first connector and the second connector.

A manufacturing method of a flexible printed circuit, comprising the steps of: providing a conventional flexible printed circuit; the conventional flexible printed circuit comprising a first connecting end, a strip body and a second connecting end; the first connecting end And the second connecting end is respectively located at opposite ends of the longitudinal extension of the strip body portion, and the first connecting end and the second connecting end are respectively provided with a first connector and a second connector; in the conventional flexible printing a plurality of via holes are formed in the body portion of the line; a ground layer is disposed on at least one surface of the strip portion, and the ground layer is electrically connected to the ground line in the strip portion through the via hole The formation includes a fitting portion and a second extension portion, and the fitting portion Attached to the surface of the main body, the two extending portions are respectively formed by bending outwardly from the two ends of the bonding layer adjacent to the first connector and the second connector.

Compared with the prior art, the flexible printed circuit of the present invention has a grounding layer with a larger area by a conventional grounding layer on a conventional flexible printed circuit board, and has a higher static electricity. Discharge capacity. When the flexible printed circuit is installed in the electronic device, it can effectively guide the electrostatic discharge path to prevent the electrostatic discharge from causing damage to various electronic components in the electronic device.

100‧‧‧Flexible printed circuit

10‧‧‧ Subject

11‧‧‧First connection

112‧‧‧First connector

12‧‧‧With body

13‧‧‧second connection

132‧‧‧Second connector

30‧‧‧ Grounding layer

31‧‧‧Fitting Department

32‧‧‧First Extension

33‧‧‧Second extension

1 is a perspective view of a preferred embodiment of a flexible printed circuit of the present invention.

Referring to FIG. 1 , the flexible printed circuit 100 has a strip shape and includes a body 10 and at least one ground layer 30 . The main body 10 is a conventional flexible printed circuit board including a first connecting end 11 , a strip body 12 and a second connecting end 13 . The first connecting end 11 and the second connecting end 13 are respectively located at opposite ends of the longitudinal extension of the strip portion 12, and the first connecting end 11 and the second connecting end 13 are respectively provided with a first connection. The device 112 and a second connector 132. A plurality of via holes (not shown) are formed in the strip portion 12, and a plurality of layers (not shown) are preliminarily provided in the strip portion 12. The first layer 112 and the second connector 132 are electrically connected to each other by a plurality of layer lines disposed inside the strip portion 12 .

The ground layer 30 has a strip shape and is made of a conductive material such as copper and is disposed on at least one surface of the body 10. The ground layer 30 is electrically connected to a ground line in the strip portion 12 by a plurality of via holes extending through the strip portion 12 . In this embodiment, the ground layer 30 is disposed on a surface of the main body 10 where the first connector 112 and the second connector 132 are disposed. The grounding layer 30 includes a bonding portion 31, a first extending portion 32 and a second extending portion 33. The bonding portion 31 is substantially rectangular strip-shaped, and is attached to a surface of the main body 10 of the flexible printed circuit 100 on a side where the first connector 112 and the second connector 132 are provided, the first connector 112 and the second The connector 132 passes through the bonding portion 31 and is exposed to the bonding portion 31. The first extension portion 32 and the second extension portion 33 are respectively formed by bending outwardly from the two ends of the bonding layer 31 near the positions of the first connector 112 and the second connector 132 to further increase The grounding area of the ground layer 30 is large.

It can be understood that the ground layer 30 is not limited to the strip shape described in the embodiment, and may be a ground point disposed on the surface of the main body 10 of the flexible printed circuit 100 or by the main body. The flexible grounding strap formed by the bending is extended on the 10th side.

It can be understood that the number of the first extending portion 32 and the second extending portion 33 can also be increased or decreased according to actual needs, and the shape thereof is not limited to the shape described in the figure, and can also be designed into various patterns according to actual needs. .

When the flexible printed circuit 100 is manufactured, the following steps are included: first, a conventional flexible printed circuit (ie, the main body 10) is provided; the conventional flexible printed circuit includes a first connecting end 11, a strip portion 12 and a second a connecting end 13; the first connecting end 11 and the second connecting end 13 are respectively located at opposite ends of the longitudinal extension of the strip body 12, and the first connecting end 11 and the second connecting end 13 are respectively disposed a first connector 112 and a second connector 132; next, a plurality of via holes are formed in the strip body portion 12 of the conventional flexible printed circuit; and finally, at least one surface of the strip portion 12 is formed. A ground layer 30 is disposed on the ground layer 30, and the ground layer 30 is electrically connected to the ground line in the strip portion 12 through the via hole.

It can be understood that the ground layer 30 can be a copper layer applied on the surface of the strip portion 12.

The flexible printed circuit 100 is provided with a ground layer 30 on a conventional flexible printed circuit board (ie, the main body 10), so that the flexible printed circuit 100 has a large area of ground contact surface and has a high electrostatic discharge capability. . When the flexible printed circuit 100 is installed in an electronic device, it can effectively guide the electrostatic discharge path to prevent electrostatic discharge from causing damage to various electronic components in the electronic device.

In summary, the present invention complies with the requirements of the invention patent and submits a patent application according to law. However, the above description is only the preferred embodiment of the present invention, and the scope of the present invention is not limited to the above embodiments, and equivalent modifications or variations made by those skilled in the art in accordance with the spirit of the present invention are It should be covered by the following patent application.

100‧‧‧Flexible printed circuit

10‧‧‧ Subject

11‧‧‧First connection

112‧‧‧First connector

12‧‧‧With body

13‧‧‧second connection

132‧‧‧Second connector

30‧‧‧ Grounding layer

31‧‧‧Fitting Department

32‧‧‧First Extension

33‧‧‧Second extension

Claims (9)

A flexible printed circuit includes a main body, the main body includes a first connecting end, a belt body and a second connecting end; the first connecting end and the second connecting end are respectively located at opposite ends of the strip body And a first connector and a second connector are respectively disposed on the first connecting end and the second connecting end; the plurality of layer lines including the grounding line are pre-configured in the strip body, the first connector and The second connector is electrically connected to each other by a line disposed inside the belt body; the improvement is that the plurality of via holes are formed through the strip body portion, and the flexible printed circuit further includes at least one ground layer disposed The ground layer is electrically connected to the ground line in the strip body through the via hole, the ground layer includes a bonding portion and two extension portions, and the bonding portion is attached to the main body On the surface, the two extension portions are respectively formed by bending outwardly from the two ends of the bonding layer adjacent to the first connector and the second connector. The flexible printed circuit of claim 1, wherein the extending portion is formed by bending outwardly from one side of the bonding layer. The flexible printed circuit of claim 2, wherein the bonding portion has a rectangular strip shape attached to a surface of the main body on a side where the first connector and the second connector are provided; The first connector and the second connector pass through the bonding portion and are exposed to the bonding portion. The flexible printed circuit of claim 2, wherein the extending portion comprises a first extending portion and a second extending portion, wherein the first extending portion and the second extending portion are respectively formed by the bonding layer The two ends are formed by bending outwardly toward the first connector and the second connector. The flexible printed circuit of claim 1, wherein the ground layer is a plurality of grounding points disposed on a surface of the body. The flexible printed circuit of claim 1, wherein the ground layer is made of a conductive material. A manufacturing method of a flexible printed circuit, comprising the steps of: providing a conventional flexible printed circuit; the conventional flexible printed circuit comprising a first connecting end, a strip body and a second connecting end; the first connecting end And the second connecting end is respectively located at opposite ends of the longitudinal extension of the strip body portion, and the first connecting end and the second connecting end are respectively provided with a first connector and a second connector; in the conventional flexible printing a plurality of via holes are formed in the body portion of the line; a ground layer is disposed on at least one surface of the strip portion, and the ground layer is electrically connected to the ground line in the strip portion through the via hole The ground layer includes a bonding portion and a second extending portion, the bonding portion is attached to the surface of the main body, and the two extending portions are respectively extended and bent by the two ends of the bonding layer adjacent to the first connector and the second connector. form. The method of manufacturing a flexible printed circuit according to claim 7, wherein the ground layer is a copper layer applied on a surface of the strip portion. The method of manufacturing a flexible printed circuit according to claim 7, wherein the extending portion is formed by bending outwardly from one side of the bonding layer.