Flexible circuit board

Abstract

The utility model relates to the technical field of circuit boards, in particular to a flexible circuit board, which comprises a display module and a flexible printed circuit (FPC) main body connected with the display module, an integrated circuit (IC) area is arranged on the display module, the IC area and the FPC main body are respectively connected with copper foils through insulation paste and conductive double-faced adhesive tape, and the flexible circuit board is arranged on the display module. The FPC main body is provided with the bending area, the bending area is provided with the first notch and the second notch, the first notch and the second notch are formed in the two ends of the bending area, and the bending area is provided with the multiple through holes, so that on the premise that wiring of the FPC main body is not affected, materials used in the bending area are reduced, and the cost is reduced. When the FPC main body is bent, the bending stress is reduced, so that the effect of facilitating bending is achieved, the first solid copper and the second solid copper are arranged in the non-wiring area of the FPC main body to be connected with the ground wire, then the first solid copper and the second solid copper are conductively connected with the copper foil, and static electricity on the copper foil is released through the ground wire.

Description

Technical Field

[0001] The utility model relates to the technical field of circuit boards, in particular to a flexible circuit board. Background Art

[0002] With the development of science and technology, more and more electronic devices have appeared in people's lives, especially electronic devices with display screens. In order to facilitate the rational use of assembly space, electronic devices with display screens need to use flexible circuit boards, which are soft and can be bent at will. Among them, flexible circuit boards (FPCs for short) are made of polyimide or polyester film as a substrate. They are highly reliable and extremely flexible printed circuit boards with high wiring density, light weight, thin thickness, and good bendability.

[0003] In the manufacture of flexible circuit boards, conductive copper foil is usually applied to the IC area and the FPC body to increase IC heat dissipation, anti-static, and IC anti-collision force. The conductive copper foil is applied from the IC to the component area on the FPC body. However, after the conductive copper foil is applied, the thickness of the FPC bending position increases, and the stress in the FPC bending area increases, which makes it inconvenient to bend the FPC body and apply the conductive copper foil on the FPC body. The static electricity generated by the FPC cannot be released on the conductive copper foil. Utility Model Content

[0004] Based on this, the purpose of the utility model is to provide a flexible circuit board that can be easily bent and can easily release static electricity.

[0005] A flexible circuit board comprises a display module and an FPC body connected to the display module, wherein an IC area is arranged on the display module, and copper foil is connected to the IC area and the FPC body respectively through insulating glue and conductive double-sided adhesive tape, wherein a bending area is arranged on the FPC body, and a first notch and a second notch are arranged at the bending area, wherein the copper foil comprises a first covering area arranged on the FPC body, a second covering area arranged on the bending area, and a third covering area arranged on the FPC body and the IC area, and a plurality of through holes are formed through the second covering area, the conductive double-sided adhesive tape and the bending area, wherein a first solid copper and a second solid copper are arranged on the FPC body, and the first solid copper and the second solid copper are electrically connected to the first covering area through the conductive double-sided adhesive tape.

[0006] Furthermore, a plurality of grooves are provided in the bending area.

[0007] Furthermore, the first notch and the second notch are of the same size and are symmetrically arranged.

[0008] Furthermore, the through hole is circular or elliptical.

[0009] Furthermore, the groove is in an arc shape.

[0010] Furthermore, the insulating glue is black Mylar insulating glue.

[0011] Furthermore, the groove includes a first groove arranged on the bending area close to the second covering area and a second groove arranged on the side away from the second covering area, and the first groove and the second groove are of the same size and are symmetrically arranged.

[0012] Furthermore, the grooves include a fifth groove disposed on the bending area close to the second covering area, and a third groove and a fourth groove disposed on a side away from the second covering area, wherein the third groove and the fourth groove are located on both sides of the fifth groove.

[0013] The utility model forms a first notch and a second notch at both ends of the bending area and opens a plurality of through holes on the bending area, thereby reducing the material used in the bending area without affecting the wiring of the FPC body, and reducing the bending stress when the FPC body is bent, thereby facilitating the bending. In addition, the first solid copper and the second solid copper are connected to the ground wire in the non-wiring area of ​​the FPC body, and then the first solid copper and the second solid copper are conductively connected to the copper foil, so that the static electricity on the copper foil is released through the ground wire, thereby preventing the phenomenon of static electricity injury. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 It is a three-dimensional structural schematic diagram of the utility model.

[0015] Figure 2 It is a partial three-dimensional structural schematic diagram of the utility model.

[0016] Figure 3 This is a schematic diagram of the first three-dimensional structure of the bending zone of the utility model.

[0017] Figure 4 This is a schematic diagram of the second three-dimensional structure of the bending zone of the utility model.

[0018] Figure 5 It is a schematic diagram of the three-dimensional structure of the first solid copper and the second solid copper of the utility model.

[0019] Figure 6 It is a schematic diagram of the three-dimensional structure of the IC area and the insulating adhesive of the utility model.

[0020] Figure 7 It is a schematic diagram of a first three-dimensional structure of the third groove, the fourth groove and the fifth groove of the utility model.

[0021] Figure 8It is a schematic diagram of a second three-dimensional structure of the third groove, the fourth groove and the fifth groove of the utility model.

[0022] Description of main component symbols:

[0023] 1-display module, 2-FPC body, 3-copper foil, 31-first covering area, 32-second covering area, 33-third covering area, 4-bending area, 41-first notch, 42-second notch, 43-through hole, 44-first groove, 45-second groove, 46-third groove, 47-fourth groove, 48-fifth groove, 5-conductive double-sided tape, 6-first solid copper, 7-second solid copper, 8-IC area, 9-insulating glue.

[0024] The following specific implementation manner will further illustrate the present utility model in conjunction with the above-mentioned drawings. DETAILED DESCRIPTION

[0025] In order to facilitate the understanding of the present invention, the present invention will be described more fully below with reference to the relevant drawings. Several embodiments of the present invention are given in the drawings. However, the present invention can be implemented in many different forms and is not limited to the embodiments described herein. On the contrary, the purpose of providing these embodiments is to make the disclosure of the present invention more thorough and comprehensive.

[0026] It should be noted that when an element is referred to as being "fixed to" another element, it may be directly on the other element or there may be a central element. When an element is considered to be "connected to" another element, it may be directly connected to the other element or there may be a central element at the same time. The terms "vertical", "horizontal", "left", "right" and similar expressions used herein are for illustrative purposes only.

[0027] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as those commonly understood by those skilled in the art in the technical field of the present invention. The terms used herein in the specification of the present invention are only for the purpose of describing specific embodiments and are not intended to limit the present invention. The term "and / or" used herein includes any and all combinations of one or more related listed items.

[0028] A flexible circuit board, such as Figure 1-Figure 6The first embodiment of the utility model is shown, which includes a display module 1 and an FPC body 2 connected to the display module 1, wherein the display module 1 is provided with an IC area 8, and the IC area 8 and the FPC body 2 are respectively connected with a copper foil 3 through an insulating adhesive 9 and a conductive double-sided adhesive 5, and the FPC body 2 is provided with a bending area 4, and the bending area 4 is provided with a first notch 41 and a second notch 42, and the copper foil 3 includes a first covering area 31 provided on the FPC body 2 and a second covering area 32 provided on the bending area 4, and a copper foil 3 is provided between the FPC body 2 and the IC area 8. A third covering area 33 is arranged on the area 8, and a plurality of through holes 43 are formed by penetrating the second covering area 32, the conductive double-sided tape 5 and the bending area 4. A first solid copper 6 and a second solid copper 7 are arranged on the FPC body 2. The first solid copper 6 and the second solid copper 7 are electrically connected to the first covering area 31 through the conductive double-sided tape 5. A plurality of grooves are opened at the bending area 4. The first notch 41 and the second notch 42 are of the same size and are symmetrically arranged. The through hole 43 is circular or elliptical, and the groove is in an arc shape. The insulating glue 9 is black Mylar insulating glue 9.

[0029] Among them, the display module 1 is used to display data, the FPC body 2 is composed of a substrate and a covering film, wherein the covering film protects the substrate and serves as the surface insulation of the FPC body 2. The production process of the FPC body 2 is usually cutting → drilling → pasting dry film → alignment → exposure → development → etching → film stripping → surface treatment → pasting covering film → pressing → curing → surface treatment → nickel gold deposition → printing characters → cutting → electrical measurement → punching → final inspection → packaging → shipping. The IC area 8 is connected to the third covering area 33 of the copper foil 3 through the insulating glue 9, which can prevent the IC area 8 and the copper foil 3 from being connected and thus causing electrostatic damage. The FPC body 2 and the copper foil 3 on the bending area 4 are designed to be reduced in the oblique arc to form a first notch 41 and a second notch 42, thereby realizing the material width at both ends of the FPC body 2. The bending area 4 forms the first notch 41 and the second notch 42, so the material of the bending area 4 is narrow. After the FPC body 2 is bent, a lever principle is formed to reduce the stress of the FPC body 2 when it is bent. The FPC body 2 and the copper foil 3 at the bending area 4 are designed with a leak hole to form a through hole 43. The position of the through hole 43 is set in the non-routing area of ​​the FPC body 2, thereby reducing the bending stress increased by the copper foil 3 in the bending area 4 of the FPC body 2, and further making the FPC body 2 easy to bend. The first solid copper 6 and the second solid copper 7 are set in the non-routing area of ​​the FPC body 2 to connect with the ground wire, and then the covering film is opened at the positions of the first solid copper 6 and the second solid copper 7, that is, the covering film at this position is removed, and then the first solid copper 6 and the second solid copper 7 are conductively connected to the first covering area 31 of the copper foil 3 through the conductive double-sided tape 5. Since the first solid copper 6 and the second solid copper 7 are conductively connected to the first covering area 31 of the copper foil 3 and the first solid copper 6 and the second solid copper 7 are connected to the ground wire, the static electricity on the copper foil 3 will be released through the ground wire. The setting of the groove can further reduce the material used in the bending area 4, reduce the stress generated when the FPC body 2 is bent, and achieve the effect of facilitating bending.

[0030] Further description, when the operator needs to bend the FPC body 2, the operator can push one end of the FPC body 2 to bend the FPC body 2 along the bending area 4 of the FPC body 2. Since the bending area 4 is provided with a first notch 41, a second notch 42 and a groove, the material used in the bending area 4 is reduced, and the stress generated during bending can also be reduced during bending, thereby achieving an effect of facilitating bending. Moreover, by providing a plurality of through holes 43 in the bending area 4, the material used in the bending area 4 can be further reduced, and the stress generated during bending can be further reduced.

[0031] In summary, by forming the first notch 41 and the second notch 42 at both ends of the bending area 4 and opening a plurality of through holes 43 on the bending area 4, the material used in the bending area 4 is reduced without affecting the routing of the FPC body 2. The bending stress will be reduced when the FPC body 2 is bent, thereby facilitating the bending. In addition, by arranging the first solid copper 6 and the second solid copper 7 in the non-routing area of ​​the FPC body 2 to be connected to the ground wire, and then making the first solid copper 6 and the second solid copper 7 conductively connected to the copper foil 3, the static electricity on the copper foil 3 will be released through the ground wire, thereby preventing static electricity injuries.

[0032] The grooves include a first groove 44 disposed on the bending area 4 close to the second covering area 32 and a second groove 45 disposed on the side away from the second covering area 32 . The first groove 44 and the second groove 45 are of the same size and are symmetrically disposed.

[0033] Among them, since the first groove 44 and the second groove 45 are set at the bending area 4, and the first groove 44 and the second groove 45 are of the same size and symmetrically arranged, it can facilitate the routing of the FPC body 2. At the same time, the material of the FPC body 2 between the first groove 44 and the second groove 45 will be very small. When the FPC body 2 is bent, the stress generated during the bending can be further reduced.

[0034] like Figure 7-Figure 8 The second embodiment of the utility model is shown. The difference between this embodiment and the first embodiment is that the groove includes a fifth groove 48 arranged on the bending area 4 close to the second covering area 32 and a third groove 46 and a fourth groove 47 arranged on the side away from the second covering area 32, and the third groove 46 and the fourth groove 47 are located on both sides of the fifth groove 48.

[0035] The third groove 46 , the fourth groove 47 and the fifth groove 48 can disperse the stress generated by bending the bending zone 4 , avoid stress concentration, and avoid damage and failure of the FPC body 2 , and also facilitate bending of the FPC body 2 .

[0036] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "example", "specific example", or "some examples" means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the utility model. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner.

[0037] The above-mentioned embodiments only express several implementation methods of the utility model, and the descriptions thereof are relatively specific and detailed, but they cannot be understood as limiting the scope of the patent of the utility model. It should be pointed out that, for ordinary technicians in this field, several variations and improvements can be made without departing from the concept of the utility model, and these all belong to the protection scope of the utility model. Therefore, the protection scope of the utility model patent shall be based on the attached claims.

Claims

1. A flexible circuit board, characterized in that: The invention comprises a display module and an FPC body connected to the display module, wherein an IC area is arranged on the display module, and copper foil is connected to the IC area and the FPC body through insulating glue and conductive double-sided glue respectively, and a bending area is arranged on the FPC body, and a first notch and a second notch are arranged at the bending area, and the copper foil comprises a first covering area arranged on the FPC body, a second covering area arranged on the bending area, and a third covering area arranged on the FPC body and the IC area, and a plurality of through holes are formed through the second covering area, the conductive double-sided glue and the bending area, and a first solid copper and a second solid copper are arranged on the FPC body, and the first solid copper and the second solid copper are electrically connected to the first covering area through the conductive double-sided glue.

2. The flexible circuit board according to claim 1, characterized in that: A plurality of grooves are provided in the bending area.

3. The flexible circuit board according to claim 1, characterized in that: The first notch and the second notch are of the same size and are symmetrically arranged.

4. The flexible circuit board according to claim 1, characterized in that: The through hole is circular or elliptical.

5. The flexible circuit board according to claim 2, characterized in that: The groove is in an arc shape.

6. The flexible circuit board according to claim 1, characterized in that: The insulating glue is black Mylar insulating glue.

7. The flexible circuit board according to claim 5, characterized in that: The groove comprises a first groove arranged on the bending area close to the second covering area and a second groove arranged on the side away from the second covering area. The first groove and the second groove are of the same size and are symmetrically arranged.

8. The flexible circuit board according to claim 5, characterized in that: The grooves include a fifth groove disposed on the bending area close to the second covering area, and a third groove and a fourth groove disposed on the side away from the second covering area, wherein the third groove and the fourth groove are located on both sides of the fifth groove.

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