CN211090106U

CN211090106U - Flexible circuit board

Info

Publication number: CN211090106U
Application number: CN201921507974.3U
Authority: CN
Inventors: 孙静
Original assignee: Huizhou Gaoshengda Technology Co Ltd
Current assignee: Huizhou Goldman Sachs light display technology Co.,Ltd.
Priority date: 2019-09-10
Filing date: 2019-09-10
Publication date: 2020-07-24
Anticipated expiration: 2029-09-10

Abstract

The utility model discloses a flexible circuit board, through setting up base plate, two-sided shielding layer, golden finger and signal access piece. In the practical application process, the arrangement of the double-sided shielding layer can prevent signals from being easily interfered in the transmission process, namely, the signal transmission stability of the flexible circuit board is enhanced; in addition, the reinforcing sheet is arranged at the tail end position of the substrate, so that the overall mechanical strength of the tail end part can be enhanced, and the phenomenon that the tail end position, namely the position of a signal access end, is not easy to bend is prevented, and the signal transmission stability of the flexible circuit board is further influenced; moreover, the head end positioning hole and the tail end positioning hole are arranged, the two positioning functions are achieved, the flexible circuit board is positioned in the X axis direction and the Y axis direction, the flexible circuit board can be well prevented from being subjected to position deviation, and the stability of signal transmission can be improved to a certain extent.

Description

Flexible circuit board

Technical Field

The utility model relates to a circuit board technical field especially relates to a flexible circuit board.

Background

At present, flexible printed circuit boards are made of polyimide or polyester film as a substrate, and have high reliability and excellent flexibility. Epoxy flexible printed wiring boards have experienced over 30 years of development since the realization of industrial production. The actual industrial production was advanced from the 70 s in the 20 th century until the late 80 s, and due to the advent and application of a new class of polyimide film materials, FPC free of adhesive was used for flexible printed circuit boards. The development of photosensitive coverlay films corresponding to high-density circuits in the world of the 90 s has led to a large shift in design of FPCs. Due to the development of new application fields, the concept of product form has changed a little, wherein the concept is extended to a wider range including substrates for TAB and COB. The high density FPC that has emerged in the latter half of the 90 s begins to enter large-scale industrial production, its circuit pattern rapidly develops to a finer degree, and the market demand of the high density FPC is rapidly increasing. With the coming of digital products in busy seasons and the development of new-generation mobile phones, the revenue of manufacturers of flexible printed circuit boards is greatly increased in nearly several months. The price reduction pressure of the product is reduced, and the price of the FPC industry is gradually restored. The flexible copper clad laminate which has flexible function and takes polyimide as a base material has more and more extensive use due to the special function, and is a new step in the circuit board industry.

The flexible circuit board is often applied to the smart mobile phone industry, because the smart mobile phone is small, if adopt traditional circuit board, the space of smart mobile phone is not enough, be not enough to hold traditional circuit board, and the smart mobile phone embeds there is more electron device, inside traditional circuit board can't assemble the smart mobile phone with other electron device together, therefore, current smart mobile phone all is the design that adopts flexible circuit board, flexible circuit board has many advantages, for example, flexible circuit board has the compliance, can buckle, not fragile etc. in process of production. First, the conventional flexible printed circuit board does not have a ground plane and a shielding layer, so that when a signal is transmitted on the flexible printed circuit board, the signal is unstable and is easily interfered; secondly, the signal access end of the flexible circuit board is easy to bend, namely the bending phenomenon is easy to occur due to insufficient mechanical strength, and the signals are not stable enough during transmission; third, the conventional flexible printed circuit board is generally provided with only one positioning hole for positioning, and the flexible printed circuit board is prone to position deviation during assembly and use, and also affects the stability of signal transmission.

SUMMERY OF THE UTILITY MODEL

The utility model aims at overcoming the weak point among the prior art, provide one kind and can guarantee that the signal is difficult for receiving the interference in transmission process, signal transmission stability is stronger, and difficult emergence of the phenomenon of buckling of signal access position department, mechanical strength is stronger and be difficult to take place the flexible circuit board of offset.

The purpose of the utility model is realized through the following technical scheme:

a flexible circuit board, comprising:

the positioning device comprises a substrate, a positioning device and a positioning device, wherein the substrate is provided with a head end and a tail end, the head end is provided with an element mounting area, the head end extends outwards partially at a position far away from the element mounting area to form a head end positioning part, the head end positioning part is provided with a head end positioning hole, the tail end extends outwards to form a tail end positioning part, and the tail end positioning part is provided with a tail end positioning hole;

the double-sided shielding layer is arranged on the substrate and covers the substrate;

the golden finger comprises a conducting strip and a plurality of conducting PIN PINs, the conducting strip is connected with the head end, each conducting PIN PIN is arranged on the conducting strip, a space is arranged between every two adjacent conducting PIN PINs, and the width range of the space is 0.068-0.072 mm; and

the signal inserts the piece, the signal inserts the piece and includes reinforcement piece and signal access ware, the reinforcement piece set up in on a side of tail end, the signal access ware set up in the tail end is kept away from on a side of reinforcement piece.

In one embodiment, the substrate comprises a substrate layer, a copper-clad layer, an additive layer and an insulating layer, wherein the substrate layer, the copper-clad layer, the additive layer and the insulating layer are sequentially stacked, and the double-sided shielding layer is located on the insulating layer.

In one embodiment, a head end bending part is disposed on the head end.

In one embodiment, the width of the head end bent part is 6 mm.

In one embodiment, the tail end is provided with a tail end bending part.

In one embodiment, a two-dimensional code area is disposed on the head end.

In one embodiment, the signal receiver includes a receiver body and a plurality of connection terminals, the receiver body is disposed on a side surface of the tail end away from the reinforcing sheet, and each connection terminal is disposed on the receiver body.

In one embodiment, the signal access device comprises 30 connecting terminals, and the connecting terminals are axially symmetrically distributed on the central axis of the access device body.

In one embodiment, a rounded portion is provided on the head end.

In one embodiment, the conductive sheet and each conductive PIN are of an integrally molded structure.

The utility model discloses compare in prior art's advantage and beneficial effect as follows:

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings that are required to be used in the embodiments will be briefly described below, it should be understood that the following drawings only illustrate some embodiments of the present invention, and therefore should not be considered as limiting the scope, and for those skilled in the art, other related drawings can be obtained according to the drawings without inventive efforts.

Fig. 1 is a schematic structural diagram of a flexible printed circuit according to an embodiment of the present invention;

fig. 2 is a schematic structural diagram of a flexible printed circuit board at another viewing angle according to an embodiment of the present invention;

fig. 3 is a schematic view of a connection structure between a substrate and a double-sided shielding layer according to an embodiment of the present invention.

Detailed Description

In order to facilitate understanding of the present invention, the present invention will be described more fully hereinafter with reference to the accompanying drawings. The preferred embodiments of the present invention are shown in the drawings. The invention may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete.

It will be understood that when an element is referred to as being "secured to" another element, it can be directly on the other element or intervening elements may also be present. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present. The terms "vertical," "horizontal," "left," "right," and the like as used herein are for illustrative purposes only and do not represent the only embodiments.

Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. The terminology used herein in the description of the invention is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. As used herein, the term "and/or" includes any and all combinations of one or more of the associated listed items.

Referring to fig. 1, a flexible circuit board 10 includes a substrate 100, a double-sided shielding layer 200, a gold finger 300, and a signal access device 400.

Thus, it should be noted that the substrate 100 is a main body of the flexible printed circuit board 10, and the circuit design and the electronic devices are performed around the substrate 100; the double-sided shielding layer 200 plays a role in improving the signal transmission stability of the flexible circuit board 10; the gold finger 300 plays a role of signal transmission and reception, and is used for connecting an external device; the signal access piece 400 functions as a signal access.

Referring to fig. 1 and fig. 2, a head end 110 and a tail end 120 are disposed on the substrate 100, the head end 110 is disposed with a component mounting region 111, a head end positioning portion 112 is formed by extending a portion of the head end 110 away from the component mounting region 111, a head end positioning hole 112a is disposed on the head end positioning portion 112, a tail end positioning portion 121 is formed by extending a portion of the tail end 120, and a tail end positioning hole 121a is disposed on the tail end positioning portion 121.

Thus, it should be noted that all the electronic components of the flexible printed circuit board 10 are mounted on the component mounting region 111; the head end positioning hole 112a and the tail end positioning hole 121a both play a role in positioning, prevent the flexible printed circuit board 10 from deviating in position during the assembling process and during the use process, and can ensure the signal transmission stability of the flexible printed circuit board 10 to a certain extent, and simultaneously, can greatly improve the assembling efficiency of the flexible printed circuit board 10, and enable an assembling person to quickly install the flexible printed circuit board 10.

Referring to fig. 1, a double-sided shielding layer 200 is disposed on a substrate 100, and the double-sided shielding layer 200 covers the substrate 100.

Therefore, it should be noted that, the arrangement of the double-sided shielding layer 200 can prevent the signals from being easily interfered in the transmission process, that is, enhance the signal transmission stability of the flexible circuit board 10; in addition, since the double-sided shielding layer 200 is a double-sided structure, the interference resistance of the flexible circuit board 10 can be improved.

Referring to fig. 1 and fig. 2, the gold finger 300 includes a conductive sheet 310 and a plurality of conductive PIN PINs 320, the conductive sheet 310 is connected to the head end 110, each conductive PIN 320 is disposed on the conductive sheet 310, and a space is disposed between two adjacent conductive PIN PINs 320, and a width of the space is 0.068 mm-0.072 mm.

Thus, it should be noted that the gold finger 300 plays a role of signal transmission and reception, and the conductive sheet 310 plays a role of electrical conduction and signal transmission; the conductive PIN 320 functions as a connection for connecting with an external device, and transmitting signals to or from the external device, so as to realize data interaction with the external device. Specifically, the conductive sheet 310 and each conductive PIN 320 are an integrally molded structure. In this way, the design of the integrally molded structure can enhance the overall mechanical strength of the gold finger 300 and prolong the service life of the gold finger 300.

Referring to fig. 1 and 2, the signal connector 400 includes a reinforcing plate 410 and a signal connector 420, the reinforcing plate 410 is disposed on a side of the tail end 120, and the signal connector 420 is disposed on a side of the tail end 120 away from the reinforcing plate 410.

Therefore, it should be noted that the reinforcing sheet 410 plays a role of enhancing mechanical strength, and since the position of the tail end 120 is a signal access end, the reinforcing sheet 410 is disposed on the tail end 120, so as to enhance the overall mechanical strength of the tail end 120, and prevent the tail end 120 from being bent due to insufficient mechanical strength, thereby affecting the signal transmission stability of the flexible circuit board 10.

Further, referring to fig. 2, in an embodiment, the substrate 100 includes a substrate layer 130, a copper-clad layer 140, an additive layer 150, and an insulating layer 160, the substrate layer 130, the copper-clad layer 140, the additive layer 150, and the insulating layer 160 are sequentially stacked, and the double-sided shielding layer 200 is located on the insulating layer 160.

Therefore, it should be noted that the copper clad layer 140 plays a role in conducting electricity, and transmits voltage to each electronic component to supply power to the electronic component; the bonding layer 150 is used for wrapping the substrate layer 130 and the copper-clad layer 140, i.e. connecting the substrate layer 130 and the copper-clad layer 140; the insulating layer 160 functions as insulation.

It should be further noted that the substrate 100 is a mirror image structure, that is, one substrate 100 has one base material layer 130, two copper-clad layers 140, two additive layers 150, and two insulating layers 160, and the two copper-clad layers 140, the two additive layers 150, and the two insulating layers 160 are axially symmetrically distributed around the central axis of the substrate 100.

It should be noted that the substrate 100 is provided with a component mounting area 111, the component mounting area 111 is formed by removing part of the bonding layer 150 and the insulating layer 160 from the substrate 100, so that the copper-clad layer 140 is partially exposed, i.e., the component mounting area 111 is formed, and the electronic component is mounted on the component mounting area 111.

Further, referring to fig. 1 again, in an embodiment, a head bending portion 113 is disposed on the head end 110.

So, it should be noted that, the head end bending part 113 is arranged to improve the space utilization of the flexible printed circuit board 10, for example, when the flexible printed circuit board 10 is assembled to the mobile phone shell, the space of the mobile phone shell is limited, and other parts are required to be assembled in the mobile phone shell, so that the head end bending part 113 is arranged to be able to be assembled to the mobile phone shell well, so as to avoid other parts, and make full use of each internal space of the mobile phone shell. Specifically, the width of the head end bent portion 113 is 6 mm. As described above, the width of the head end bent portion 113 can be flexibly set according to specific conditions, and is preferably 6 mm.

Further, referring to fig. 1 again, in an embodiment, the tail end 120 is provided with a tail end bending portion 122.

As described above, the function of the tail-end bending portion 122 is the same as that of the head-end bending portion 113, and the function of the head-end bending portion 113 is referred to improve the space utilization of the flexible circuit board 10. Specifically, the width of the tail bent portion 113 is 6 mm. As described above, the width of the tail bent portion 113 can be flexibly set in accordance with actual conditions, and is preferably 6 mm.

Further, referring to fig. 2 again, in one embodiment, the head end 110 is provided with a two-dimensional code area 114.

Therefore, it should be noted that the two-dimensional code area 114 can perform a tracking function, so that when the flexible printed circuit board 10 is produced, a manufacturer can track the flexible printed circuit board 10 by scanning the two-dimensional code arranged in the two-dimensional code area 114, thereby facilitating management of the flexible printed circuit board 10.

Further, referring to fig. 2 again, in an embodiment, the signal receiver 420 includes a receiver body 421 and a plurality of connection terminals 422, the receiver body 421 is disposed on a side of the tail end 120 away from the reinforcing sheet 410, and each connection terminal 422 is disposed on the receiver body 421.

Thus, it should be noted that the access device body 421 plays a role of signal processing, and transmits a signal; the plurality of connection terminals 422 function as connections for connecting with external devices to connect signals. Specifically, the signal receiver 420 includes 30 connection terminals 422, and each of the connection terminals 422 is axially symmetrically distributed about a central axis of the receiver body 421. Thus, it should be noted that the signal access device 420 includes 30 connection terminals 422, and each connection terminal 422 is axisymmetrically distributed with the central axis of the access device body 421, and when the axisymmetric distribution enables the signal access device 420 to be connected with an external device, the connection is more stable, and the connection is prevented from being loosened.

Further, referring to fig. 1 again, in one embodiment, the head end 110 is provided with a rounded portion 115.

In this way, the rounded portion 115 can prevent the flexible printed circuit board 10 from being damaged due to excessive physical contact between the flexible printed circuit board 10 and other components.

The above-mentioned embodiments only represent some embodiments of the present invention, and the description thereof is more specific and detailed, but not to be construed as limiting the scope of the present invention. It should be noted that, for those skilled in the art, without departing from the spirit of the present invention, several variations and modifications can be made, which are within the scope of the present invention. Therefore, the protection scope of the present invention should be subject to the appended claims.

Claims

1. A flexible circuit board, comprising:

2. The flexible printed circuit board of claim 1, wherein the substrate comprises a substrate layer, a copper-clad layer, a bonding layer and an insulating layer, the substrate layer, the copper-clad layer, the bonding layer and the insulating layer are sequentially stacked, and the double-sided shielding layer is disposed on the insulating layer.

3. The flexible circuit board of claim 1, wherein the head end is provided with a head end bending portion.

4. The flexible circuit board of claim 3, wherein the width of the head bending portion is 6 mm.

5. The flexible circuit board of claim 1, wherein the tail end has a tail end bending portion.

6. The flexible circuit board of claim 1, wherein the header has a two-dimensional code area disposed thereon.

7. The flexible circuit board of claim 1, wherein the signal connector comprises a connector body and a plurality of connecting terminals, the connector body is disposed on a side of the tail end away from the reinforcing plate, and each connecting terminal is disposed on the connector body.

8. The flexible circuit board of claim 7, wherein the signal connector comprises 30 connecting terminals, and each connecting terminal is axially symmetrically distributed around a central axis of the connector body.

9. The flexible circuit board of claim 1, wherein the head end is provided with a rounded portion.

10. The flexible circuit board of claim 1, wherein the conductive sheet and each conductive PIN are integrally formed.