FPC binding structure

Abstract

The utility model discloses an FPC binding structure, which relates to the field of electronic devices, and comprises a glass substrate and an FPC, the glass substrate is provided with a wiring area, the FPC is provided with a binding end, the binding end is crimped in the wiring area through a conductive adhesive, so that the FPC is electrically bound with the wiring area on the glass substrate, the glass substrate is provided with metal coatings at two sides of the wiring area, and the metal coatings are coated on the glass substrate. Extending parts are arranged on the two sides of the binding end, the extending parts are bonded with the metal coating, and the protective paper covers the binding position of the glass substrate and the FPC; according to the utility model, when the FPC is subjected to pulling force, the protective paper firstly resists pulling force and is matched with the bonding of the metal coating and the extension part on the FPC, so that the purpose of double-layer resistance is achieved, the tensile strength of the FPC is greatly improved, the FPC is prevented from being broken and falling off from the glass substrate, the binding stability of the FPC and the glass substrate is ensured, the reliability of an electronic display product is ensured, and the service life of the electronic display product is prolonged. And the quality of electronic products is improved, and the method is suitable for binding narrow-edge FPCs.

Description

Technical Field

[0001] The utility model relates to the technical field of electronic devices, and particularly relates to an FPC binding structure. Background Art

[0002] The flexible printed circuit board, abbreviated as FPC, is a highly reliable and excellent flexible printed circuit board made of polyimide or polyester film as the base material, and has the characteristics of high wiring density, light weight, thin thickness, and good bendability.

[0003] When the flexible printed circuit board is connected to the display module, one end of the flexible printed circuit board needs to be bound to the gold fingers on the glass substrate. After binding, the binding position between the flexible printed circuit board and the glass substrate is prone to tearing, and there is a risk of the flexible printed circuit board falling off. Patent Application No. 202221916158.X discloses an anti-tearing FPC, including an FPC flexible circuit board. A receptor electronic component is arranged below the FPC flexible circuit board, and the FPC flexible circuit board is electrically connected to the receptor electronic component. Two tensile protection layers are arranged above the FPC flexible circuit board. The upper parts of the back surfaces of the two tensile protection layers are respectively bonded to the two lower corners of the FPC flexible circuit board through adhesives, and the lower parts of the back surfaces of the two tensile protection layers are both bonded to the receptor electronic component through adhesives. The tensile protection layers arranged in this structure are equivalent to arranging two reinforcing ribs between the FPC flexible circuit board and the receptor electronic component, enhancing the tensile strength on both sides of the binding position between the FPC flexible circuit board and the receptor electronic component, avoiding the fracture of both sides of the binding position between the FPC flexible circuit board and the receptor electronic component, and effectively improving the qualification rate and production efficiency of the FPC component.

[0004] With the rapid development of the automotive industry, intelligence has also been applied to automobiles, and intelligent displays have been installed in automobiles, improving the driving experience of drivers. However, with the popularization of the use of displays in automobiles, the design requirements for more and more special-shaped displays in automobiles are also increasing. The binding position size between the TFT glass substrate and the FPC is also required to be smaller and smaller. However, after reducing the binding size, the bonding strength between the FPC and the glass substrate is reduced, the tensile strength of the bonding position is weak, and when the FPC is pulled, the bonding position is prone to falling off, posing a quality risk to the reliability of the product. Only using the tensile protection layer is difficult to improve the bonding strength between the FPC and the glass substrate. Therefore, the utility model discloses an FPC binding structure to solve the above problems. Summary of the Utility Model

[0005] Based on this, in view of the above technical problems, it is necessary to provide an FPC bonding structure. The bonding ends on both sides of the FPC are extended outward to form extension parts, and a metal coating is added on the glass substrate, thereby increasing the bonding size between the FPC and the glass substrate, improving the adhesion between the FPC and the glass substrate, further enhancing the tensile force resistance at the bonding position, and a protective paper is provided at the bonding position, increasing the bonding strength between the FPC and the glass substrate. When the FPC is subjected to a pulling force, the protective paper resists the pulling first, and in cooperation with the bonding between the metal coating and the extension parts on the FPC, the purpose of double-layer resistance is achieved, greatly improving the tensile strength of the FPC, avoiding the fracture and detachment of the FPC from the glass substrate, ensuring the bonding stability between the FPC and the glass substrate, ensuring the reliability of electronic display products, improving the quality of electronic products, and being applicable to the bonding of narrow-edge FPCs.

[0006] To solve the above technical problems, the present utility model adopts the following technical solutions:

[0007] An FPC bonding structure, which includes a glass substrate and an FPC. A wiring area is provided on the glass substrate, and a bonding end is provided on the FPC. The bonding end is press-bonded to the wiring area through conductive adhesive, so that the FPC is electrically bonded to the wiring area on the glass substrate. Metal coatings are provided on both sides of the glass substrate at the wiring area, extension parts are provided on both sides of the bonding end, the extension parts are bonded to the metal coatings, and a protective paper covers the bonding position between the glass substrate and the FPC.

[0008] As a preferred embodiment of the FPC bonding structure provided by the present utility model, the two sides of the FPC and the bonding end are smoothly butted.

[0009] As a preferred embodiment of the FPC bonding structure provided by the present utility model, the extension parts and the metal coatings are bonded by an adhesive layer.

[0010] As a preferred embodiment of the FPC bonding structure provided by the present utility model, the bonding force between the extension parts and the metal coatings is greater than the bonding force between the bonding end and the wiring area.

[0011] As a preferred embodiment of the FPC bonding structure provided by the present utility model, the metal coating is a rectangular structure and there is a gap between the metal coating and the wiring area.

[0012] As a preferred embodiment of the FPC bonding structure provided by the present utility model, the outer edge of the protective paper is 1 - 5 mm away from the bonding position between the glass substrate and the FPC, and the protective paper is provided on the front side of the glass substrate.

[0013] As a preferred embodiment of the FPC bonding structure provided by the present utility model, protective adhesive layers are coated on both sides of the bonding position between the FPC and the glass substrate. The protective adhesive layers are located between the protective paper and the glass substrate, and the protective adhesive layers bond the upper surface of the bonding end of the FPC to the glass substrate.

[0014] As a preferred embodiment of the FPC bonding structure provided by the present utility model, the protective adhesive layer is a UV adhesive.

[0015] As a preferred embodiment of the FPC bonding structure provided by the present utility model, alignment marks are provided on the glass substrate. The alignment marks are set in two groups and are respectively located on one side of the two metal coatings away from each other.

[0016] As a preferred embodiment of the FPC bonding structure provided by the present utility model, the alignment marks are cross-line mark structures, and the two corner ends on both sides of the bonding end of the FPC are aligned with the alignment marks.

[0017] Compared with the prior art, the present utility model has the following beneficial effects: For the FPC bonding structure provided by the present utility model, extension parts are formed by extending both sides of the bonding end of the FPC outwards, and metal coatings are added on the glass substrate, thereby increasing the bonding size between the FPC and the glass substrate, improving the adhesion between the FPC and the glass substrate, further increasing the tensile strength of the bonding position, and a protective paper is provided at the bonding position to increase the bonding strength between the FPC and the glass substrate. When the FPC is subjected to a pulling force, the protective paper resists the pulling first, and cooperates with the bonding of the metal coating and the extension part on the FPC to achieve the purpose of double-layer resistance, greatly improving the tensile strength of the FPC, preventing the FPC from breaking and falling off the glass substrate, ensuring the bonding stability between the FPC and the glass substrate, ensuring the reliability of electronic display products, improving the quality of electronic products, and being applicable to the bonding of narrow-edge FPCs. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to more clearly illustrate the solutions in the present utility model, the following will briefly introduce the drawings required for use in the description of the embodiments. Obviously, the following-described drawings are some embodiments of the present utility model. For those of ordinary skill in the art, other drawings can be obtained based on these drawings without creative efforts.

[0019] Figure 1 It is a three-dimensional schematic diagram of the overall structure of the FPC bonding structure provided by the present utility model;

[0020] Figure 2 It is a disassembled schematic diagram of the overall structure of the FPC bonding structure provided by the present utility model;

[0021] Figure 3Schematic diagram of the FPC structure in the FPC bonding structure provided by the present utility model;

[0022] Figure 4 Planar schematic diagram of the overall structure of the FPC bonding structure provided by the present utility model;

[0023] Figure 5 is Figure 4 Enlarged schematic diagram at position A in

[0024] The markings in the figure are explained as follows:

[0025] 1. Glass substrate; 2. FPC; 3. Wiring area; 4. Bonding end; 5. Metal coating; 6. Extension part; 7. Protective paper; 8. Protective adhesive layer; 9. Alignment marking line. Specific implementation manner

[0026] In order to enable those skilled in the art to better understand the solution of the present utility model, the technical solutions in the embodiments of the present utility model will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all the embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present utility model.

[0027] As described in the background art, with the popularization of the use of display screens in vehicles, the design requirements for more and more special-shaped screens in vehicles are also increasing. The binding position size between the TFT glass substrate and the FPC is also required to be smaller and smaller. However, after reducing the binding size, the bonding strength between the FPC and the glass substrate is reduced, the tensile strength of the bonding position is weak, and when the FPC is pulled, the bonding position is prone to falling off, which poses a quality risk to the reliability of the product. Only using a tensile protection layer is difficult to improve the bonding strength between the FPC and the glass substrate.

[0028] To solve this technical problem, the present utility model provides an FPC bonding structure, which is applied to the field of electronic devices.

[0029] Specifically, please refer to Figures 1-5 , the FPC bonding structure specifically includes a glass substrate 1 and an FPC 2. A wiring area 3 is provided on the glass substrate 1, and a bonding end 4 is provided on the FPC 2. The bonding end 4 is press-bonded to the wiring area 3 through a conductive adhesive, so that the FPC 2 is electrically bonded to the wiring area 3 on the glass substrate 1. Metal coatings 5 are provided on both sides of the glass substrate 1 at the wiring area 3, extension parts 6 are provided on both sides of the bonding end 4, the extension parts 6 are bonded to the metal coatings 5, and a protective paper 7, and the protective paper 7 covers the bonding position of the glass substrate 1 and the FPC 2.

[0030] The FPC binding structure provided by the present utility model extends the two sides of the binding end 4 of the FPC 2 outward to form extension parts 6, and adds a metal coating 5 on the glass substrate 1, thereby increasing the binding size between the FPC 2 and the glass substrate 1, improving the adhesion between the FPC 2 and the glass substrate 1, further improving the tensile strength of the binding position, and arranging a protective paper 7 at the binding position, increasing the bonding strength between the FPC 2 and the glass substrate 1. When the FPC 2 is subjected to a pulling force, the protective paper 7 first resists the pulling force, and cooperates with the bonding of the metal coating 5 and the extension part 6 on the FPC 2 to achieve the purpose of double-layer resistance, greatly improving the tensile strength of the FPC 2, avoiding the FPC 2 from breaking and falling off the glass substrate 1, ensuring the binding stability between the FPC 2 and the glass substrate 1, ensuring the reliability of the electronic display product, improving the quality of the electronic product, and being applicable to the binding of narrow-edge FPC 2.

[0031] In order to enable those skilled in the art to better understand the solution of the present utility model, the technical solutions in the embodiments of the present utility model will be clearly and completely described below with reference to the accompanying drawings.

[0032] It should be noted that, without conflict, the embodiments in the present utility model and the features and technical solutions in the embodiments can be combined with each other.

[0033] It should be noted that similar reference numerals and letters denote similar items in the following drawings. Therefore, once an item is defined in one drawing, it does not need to be further defined and explained in subsequent drawings.

[0034] Please refer to Figures 1-5 , which provides an FPC binding structure, which includes a glass substrate 1 and an FPC 2. A wiring area 3 is provided on the glass substrate 1, and a plurality of wiring heads are provided at the wiring area 3. A binding end 4 is provided on the FPC 2, and a gold finger is provided at the binding end 4. The binding end 4 is press-connected to the wiring area 3 through a conductive adhesive to bind the FPC 2 to the glass substrate 1, and the gold finger is docked with the wiring head one by one to complete

[0035] The FPC2 is electrically bonded to the wiring area 3 on the glass substrate 1. Since the size of the FPC2 is small, the area for bonding and positioning is small, and the tensile force is weak. Therefore, metal coatings 5 are provided on both sides of the glass substrate 1 at the wiring area 3, and extension parts 6 are provided on both sides of the bonding end 4. The extension parts 6 are bonded to the metal coatings 5 to widen the width of the bonding and positioning area, thereby increasing the bonding area between the FPC2 and the glass substrate 1, further enhancing the tensile force of the bonding and positioning area. After the FPC2 and the glass substrate 1 are bonded, a protective paper 7 is covered on the bonding and positioning area of the glass substrate 1 and the FPC2. The protective paper 7 is provided on the front side of the glass substrate 1, and the outer side edge of the protective paper 7 is 1-5 mm away from the bonding and positioning area of the glass substrate 1 and the FPC2, so that the protective paper 7 can completely cover the bonding end 4 of the FPC2, the wiring area 3 on the glass substrate 1, and the metal coatings 5, to increase the adhesive force and prevent the protective paper 7 from resisting the pulling force first when there is a lateral pulling force.

[0036] The two sides of the FPC2 are smoothly butted against the bonding end 4, so that an inclined structure is formed between the two sides of the bonding area of the FPC2 and the side wall of the main body part of the FPC2. When the FPC2 is pulled, the main body part of the FPC2 and the bonding end 4 are prevented from being torn, so as to achieve the purpose of protecting the FPC2.

[0037] When bonding, for the purpose of conducting electricity, the bonding area of the FPC2 is bonded to the wiring area 3 through a conductive adhesive that can conduct electricity, while the bonding of the extension part 6 to the metal coating 5 does not require conductivity, and a glue layer with strong adhesive force can be used to bond the extension part 6 to the metal coating 5, so that the adhesive force between the extension part 6 and the metal coating 5 is greater than the adhesive force between the bonding end 4 and the wiring area 3. The metal coating 5 is a rectangular structure and there is a gap between the metal coating 5 and the wiring area 3 to avoid the metal coating 5 affecting the electrical connection effect of the FPC2.

[0038] The FPC bonding structure provided in Embodiment 1 is further optimized. Specifically, as Figure 2 、 5 shown, in order to further improve the bonding strength between the FPC2 and the glass substrate 1, after the FPC2 and the glass substrate 1 are bonded, a protective glue layer 8 is coated on both sides of the bonding and positioning area between the FPC2 and the glass substrate 1. The protective glue layer 8 is located between the protective paper 7 and the glass substrate 1. The protective glue layer 8 bonds the upper surface of the bonding end 4 of the FPC2 to the glass substrate 1 together to increase the tensile resistance ability at both ends of the FPC2 and the glass substrate 1. The protective glue layer 8 is selected as UV glue. After the protective glue layer 8 is coated, it can be quickly cured by ultraviolet irradiation, improving the processing efficiency.

[0039] The FPC bonding structure provided in Embodiment 2 is further optimized. Specifically, as Figure 2 、 5As shown in the figure, alignment marks 9 are provided on the glass substrate 1. The alignment marks 9 are divided into two groups and are respectively located on the sides of the two metal coatings 5 away from each other. The alignment marks 9 are used to position the FPC 2 to ensure the bonding accuracy of the FPC 2. Moreover, the alignment marks 9 are in the structure of crosshair marks. The two corner ends on both sides of the bonding end 4 of the FPC 2 are aligned with the alignment marks 9. The crosshair mark structure can be used to align the two sides of the corner of the bonding end 4 of the FPC 2, thereby further improving the bonding accuracy of the FPC 2.

[0040] The working principle of the FPC bonding structure provided by the present utility model is as follows: A conductive adhesive layer is coated on the wiring area 3 of the glass substrate 1, and a glue layer is coated on the surface of the metal coating 5. Then, after aligning the two sides of the bonding end 4 of the FPC 2 with the alignment marks 9, the FPC 2 is pressed down so that the FPC 2 is bonded and fixed to the glass substrate 1. After the bonding is completed, a protective glue layer 8 is coated again on both sides of the bonding end 4 of the FPC 2. The protective glue layer 8 covers the bonding position of the FPC 2 and the glass substrate 1 to increase the tensile strength at both ends of the FPC 2. Finally, a protective paper 7 is covered on the FPC 2. The protective paper 7 completely covers the bonding end 4 of the FPC 2, the wiring area 3 on the glass substrate 1, and the metal coating 5. The two sides of the bonding end 4 of the FPC 2 extend outward to form an extension part 6, and a metal coating 5 is added on the glass substrate 1, thereby increasing the bonding size between the FPC 2 and the glass substrate 1, improving the adhesive force between the FPC 2 and the glass substrate 1, further increasing the tensile strength at the bonding position, and a protective paper 7 is provided at the bonding position to increase the bonding strength between the FPC 2 and the glass substrate 1. When the FPC 2 is subjected to a pulling force, the protective paper 7 resists the pulling first, and cooperates with the bonding of the metal coating 5 and the extension part 6 on the FPC 2 to achieve the purpose of double-layer resistance, greatly improving the tensile strength of the FPC 2, preventing the FPC 2 from breaking and falling off the glass substrate 1, ensuring the bonding stability of the FPC 2 and the glass substrate 1, ensuring the reliability of the electronic display product, improving the quality of the electronic product, and being applicable to the bonding of narrow-edge FPC 2.

[0041] In the present utility model, unless otherwise clearly defined and limited, terms such as "installation", "connection", "connection", "fixation", etc. should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or integrated; it can be a mechanical connection, an electrical connection, or communication with each other; it can be directly connected, or indirectly connected through an intermediate medium, which can be the internal communication of two components or the interaction relationship between two components, unless otherwise clearly defined. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood according to specific situations.

[0042] Obviously, the embodiments described above are only a part of the embodiments of the present utility model, rather than all of them. The preferred embodiments of the present utility model are shown in the accompanying drawings, but do not limit the patent scope of the present utility model. The present utility model can be implemented in many different forms. On the contrary, the purpose of providing these embodiments is to make the understanding of the disclosed content of the present utility model more thorough and comprehensive. Although the present utility model has been described in detail with reference to the foregoing embodiments, for those skilled in the art, they can still modify the technical solutions recorded in the foregoing specific embodiments, or perform equivalent replacements for some of the technical features. Any equivalent structures directly or indirectly using the content of the specification and drawings of the present utility model in other related technical fields are similarly within the scope of the patent protection of the present utility model.

Claims

1. An FPC binding structure, comprising a glass substrate and an FPC, characterized in that: The glass substrate is provided with a wiring area, the FPC is provided with a binding end, the binding end is crimped to the wiring area by conductive adhesive, so that the FPC is electrically bound to the wiring area on the glass substrate, the glass substrate is provided with a metal coating on both sides of the wiring area, and the binding end is provided with an extension part on both sides, the extension part is bonded to the metal coating, and protective paper is provided, and the protective paper covers the binding position of the glass substrate and the FPC.

2. The FPC binding structure according to claim 1, characterized in that: The FPC is smoothly butted against both sides of the binding end.

3. The FPC binding structure according to claim 1, characterized in that: The extension part and the metal coating are bonded by using a glue layer.

4. The FPC binding structure according to claim 3, characterized in that: The bonding force between the extension portion and the metal coating is greater than the bonding force between the binding end and the wiring area.

5. The FPC binding structure according to claim 1, characterized in that: The metal coating is a rectangular structure and a gap is left between the metal coating and the wiring area.

6. The FPC binding structure according to claim 1, characterized in that: The protective paper is arranged on the front side of the glass substrate, and the outer side edge of the protective paper is 1-5 mm away from the binding position between the glass substrate and the FPC.

7. The FPC binding structure according to claim 1, characterized in that: Protective adhesive layers are coated on both sides of the binding position of the FPC and the glass substrate. The protective adhesive layers are located between the protective paper and the glass substrate. The protective adhesive layers adhere the upper surface of the binding end of the FPC to the glass substrate.

8. The FPC binding structure according to claim 7, characterized in that: The protective adhesive layer is UV adhesive.

9. The FPC binding structure according to claim 1, characterized in that: The glass substrate is provided with alignment marking lines, which are arranged in two groups and are respectively located at the sides of the two metal coatings that are away from each other.

10. The FPC binding structure according to claim 9, characterized in that: The alignment mark is a cross mark structure, and the corner ends on both sides of the binding end of the FPC are aligned with the alignment mark.

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