FPC structure with double-sided adhesive tape

Abstract

The embodiment of the utility model belongs to the technical field of FPCs (Flexible Printed Circuit). The utility model further relates to an FPC structure with the double-sided adhesive tape, the FPC structure comprises an FPC main body, the bottom surface of the FPC main body is provided with the reinforcing plate, the first hot-melting double-sided adhesive tape is attached to one surface, far away from the FPC main body, of the reinforcing plate, and the first hot-melting double-sided adhesive tape is used for realizing the connection between the reinforcing plate and a bonded body. According to the application, the first hot-melting double-sided adhesive tape is arranged, the first hot-melting double-sided adhesive tape is used for replacing a traditional double-sided adhesive tape, and the viscosity of the hot-melting double-sided adhesive tape is not reduced but is enhanced in a high-temperature environment because the hot-melting double-sided adhesive tape is melted and flows through heating in a certain temperature range according to the design principle of the hot-melting double-sided adhesive tape, so that the viscosity of the hot-melting double-sided adhesive tape is improved; therefore, even in the SMT manufacturing process of high-temperature baking, the hot melting type double-sided adhesive tape can keep good viscosity and conduction performance, and the risk of functional problems caused by reduction of viscosity is effectively avoided.

Description

Technical Field

[0001] This utility model relates to the field of FPC technology, and more specifically, to an FPC structure with double-sided adhesive. Background Art

[0002] For display touch modules, FPC is generally required to achieve circuit connectivity between the screen and the motherboard. Of course, the function realization also depends on the IC or other electronic components on the FPC. The electronic components are distributed on the front part of the FPC, and the electronic components are connected to the circuit diagram on the FPC through soldering (i.e. SMT). Placing electronic components also requires a certain carrier, that is, a steel sheet or FR4 is set on the back of the FPC. The steel sheet is a conductive material, and FR4 is a non-conductive material, depending on the needs of the motherboard. The steel sheet or FR4 is generally fixed to a specific position by double-sided adhesive, such as the screen backlight iron ore or the customer's motherboard.

[0003] Because the SMT process requires high-temperature baking, the double-sided adhesive on existing FPCs can lose viscosity after exposure to high temperatures. This is especially true for designs with a steel sheet and conductive double-sided adhesive. This reduced viscosity also reduces the conductivity between the steel sheet and the bonded object (such as the backlight frame), increasing the risk of functional issues. Therefore, we have improved this by proposing an FPC structure with double-sided adhesive. Utility Model Content

[0004] The technical problem to be solved by the embodiments of the present invention is that the viscosity of the double-sided adhesive on the existing FPC decreases after being exposed to high temperature.

[0005] In order to solve the above technical problems, the present invention adopts the following technical solutions:

[0006] An FPC structure with double-sided adhesive includes: an FPC body; a reinforcement plate is provided on the bottom surface of the FPC body; a first hot-melt double-sided adhesive is attached to the side of the reinforcement plate away from the FPC body; the first hot-melt double-sided adhesive is used to connect the reinforcement plate to the adhered object; the first hot-melt double-sided adhesive is provided to replace the traditional double-sided tape; the viscosity of the hot-melt double-sided adhesive is not reduced but enhanced in a high-temperature environment; this is because the design principle of the hot-melt double-sided adhesive is to melt and flow by heating within a certain temperature range, thereby enhancing contact and adhesion with other surfaces. Therefore, even in the high-temperature baking SMT process, the hot-melt double-sided adhesive can maintain its good viscosity and conductivity, effectively avoiding the risk of functional problems caused by reduced viscosity.

[0007] As an improvement of the present invention, a first high-temperature resistant release film is provided on the side of the first hot-melt double-sided adhesive away from the FPC body, and a tear handle is provided on one side of the first high-temperature resistant release film.

[0008] As an improvement of the present invention, the first high-temperature resistant release film is used for protection before the first hot-melt double-sided adhesive is bonded, and the tear handle is used to assist in tearing off the first high-temperature resistant release film.

[0009] As an improvement of this utility model, the top surface of the FPC body is provided with a component area, and the position of the component area corresponds to the position of the first hot melt double-sided adhesive.

[0010] As an improvement of this utility model, the FPC body has FPC gold fingers, and a foolproof opening is provided at the FPC gold fingers, the foolproof opening being located at a non-center position of the FPC gold fingers.

[0011] As an improvement of the present invention, the FPC gold finger is connected to an FPC connector, and an anti-fool protrusion is provided in the FPC connector, and the anti-fool protrusion is plugged into the inner wall of the anti-fool opening.

[0012] As an improvement of this utility model, a first connecting frame is fixedly installed on the top of the FPC connector, and a second connecting frame corresponding to the position of the first connecting frame is fixedly connected to the top of the FPC body.

[0013] As an improvement of this utility model, a second high-temperature resistant release film is also provided at the bottom of the FPC body, and a second hot melt double-sided adhesive is fixedly connected to the side of the tear handle near the second high-temperature resistant release film, and the second hot melt double-sided adhesive is bonded to the second high-temperature resistant release film.

[0014] As an improvement of the present invention, the outer dimensions of the second hot-melt double-sided adhesive are smaller than the outer dimensions of the tear handle.

[0015] As an improvement of this utility model, the first high-temperature resistant release film is also used to cooperate with the first connecting frame and the second connecting frame after the first hot melt double-sided adhesive bonding to limit the position of the FPC body and the FPC connector.

[0016] Compared with the prior art, the embodiments of the present invention have the following beneficial effects:

[0017] In order to solve the problem in the prior art that the viscosity of the double-sided adhesive on the FPC will decrease after being exposed to high temperature, the present application sets up a first hot-melt double-sided adhesive to replace the traditional double-sided tape. The viscosity of the hot-melt double-sided adhesive will not only not decrease but will increase in a high temperature environment. This is because the design principle of the hot-melt double-sided adhesive is to melt and flow it by heating within a certain temperature range, thereby enhancing contact and adhesion with other surfaces. Therefore, even in the high-temperature baking SMT process, the hot-melt double-sided adhesive can maintain its good viscosity and conductivity, effectively avoiding the risk of functional problems caused by reduced viscosity. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 A schematic diagram of the FPC structure with double-sided adhesive provided in this application;

[0019] Figure 2 A schematic diagram of the structure of a reinforcement plate with a double-sided adhesive FPC structure provided in this application;

[0020] Figure 3 A schematic diagram of the structure of the FPC structure with double-sided adhesive provided in this application;

[0021] Figure 4 The FPC structure with double-sided adhesive provided in this application Figure 3 Exploded diagram;

[0022] Figure 5 The FPC structure with double-sided adhesive provided in this application Figure 4 Schematic diagram of the structure viewed from above;

[0023] Figure 6 A schematic diagram of the structure of the first high-temperature release film with double-sided adhesive FPC structure provided in this application when inserted between the first connecting frame and the second connecting frame.

[0024] Indicated in the figure:

[0025] 1. FPC body; 101. FPC gold finger; 102. Anti-mash port; 103. Component area; 104. Reinforcement plate; 2. First hot-melt double-sided adhesive; 3. First high-temperature resistant release film; 301. Tear handle; 4. Second hot-melt double-sided adhesive; 5. Second high-temperature resistant release film; 6. FPC connector; 601. Anti-mash protrusion; 7. First connection frame; 8. Second connection frame. DETAILED DESCRIPTION

[0026] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by those skilled in the art to which this utility model belongs; the terms used in the specification of the application herein are only for the purpose of describing specific embodiments and are not intended to limit the utility model. Reference to "embodiments" herein means that the specific features, structures or characteristics described in conjunction with the embodiments may be included in at least one embodiment of the utility model. The appearance of this phrase in various places in the specification does not necessarily refer to the same embodiment, nor is it an independent or alternative embodiment that is mutually exclusive with other embodiments. It is explicitly and implicitly understood by those skilled in the art that the embodiments described herein can be combined with other embodiments.

[0027] As described in the background technology, the SMT process requires high-temperature baking. However, the double-sided adhesive on existing FPCs will lose viscosity after being exposed to high temperatures, especially for the design of steel sheet + conductive double-sided adhesive. If the viscosity decreases, the conductivity between the steel sheet and the bonded object (such as the backlight iron frame) will also decrease, increasing the risk of functional problems.

[0028] In order to solve this technical problem, the utility model provides an FPC structure with double-sided adhesive.

[0029] Specifically, please refer to Figure 1-Figure 2 , the FPC structure with double-sided adhesive specifically includes:

[0030] The FPC body 1 has a reinforcing plate 104 on its bottom surface. A first hot-melt double-sided adhesive 2 is attached to the side of the reinforcing plate 104 away from the FPC body 1. The first hot-melt double-sided adhesive 2 is used to connect the reinforcing plate 104 to the bonded object.

[0031] The utility model provides an FPC structure with double-sided adhesive. The first hot-melt double-sided adhesive 2 is set in this application to replace the traditional double-sided adhesive. The viscosity of the hot-melt double-sided adhesive will not decrease but will increase in a high-temperature environment. This is because the design principle of the hot-melt double-sided adhesive is to melt and flow it by heating within a certain temperature range, thereby enhancing contact and adhesion with other object surfaces. Therefore, even in the high-temperature baking SMT process, the hot-melt double-sided adhesive can maintain its good viscosity and conductivity, effectively avoiding the risk of functional problems caused by reduced viscosity.

[0032] In order to enable those skilled in the art to better understand the solution of the present invention, the technical solution in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings.

[0033] It should be noted that, in the absence of conflict, the embodiments of the present invention and the features and technical solutions therein can be combined with each other.

[0034] It should be noted that similar labels and letters in the following figures indicate similar items. Therefore, once an item is defined in one figure, it does not need to be further defined and explained in subsequent figures.

[0035] Embodiment 1 of the present invention: an FPC structure with double-sided adhesive.

[0036] Please refer to Figure 1-Figure 2 The present invention relates to an FPC structure with double-sided adhesive, comprising: an FPC body 1, a reinforcing plate 104 on the bottom surface of the FPC body 1, and a first hot melt double-sided adhesive 2 attached to the side of the reinforcing plate 104 away from the FPC body 1. The first hot melt double-sided adhesive 2 is used to connect the reinforcing plate 104 to the bonded body, which is a backlight iron frame. The present application replaces the traditional double-sided adhesive with the first hot melt double-sided adhesive 2. In high-temperature environments, the adhesiveness of hot melt double-sided adhesive will not decrease but will increase. This is because the design principle of hot melt double-sided adhesive is to melt and flow it within a certain temperature range, thereby enhancing the contact and adhesion with other object surfaces. Therefore, even in the SMT process of high-temperature baking, hot melt double-sided adhesive can maintain its good adhesion and conductivity, effectively avoiding the risk of functional problems caused by reduced adhesion.

[0037] Hot melt double-sided adhesive is a special type of tape whose tackiness increases with temperature. This type of tape typically contains a hot melt adhesive, which may have low tackiness at room temperature but becomes more viscous and adhesive at high temperatures. The advantage of using hot melt double-sided adhesive is that it can resist the effects of high-temperature environments on tackiness. Unlike ordinary double-sided adhesive, whose tackiness may decrease at high temperatures, hot melt double-sided adhesive actually increases in tackiness at high temperatures. This characteristic makes hot melt double-sided adhesive very suitable for use in high-temperature environments.

[0038] Embodiment 2 of this utility model with a double-sided adhesive FPC structure

[0039] This utility model further includes a double-sided adhesive FPC structure, such as... Figure 2 As shown, a first high-temperature resistant release film 3 is provided on the side of the first hot melt double-sided adhesive 2 away from the FPC body 1, and a tear handle 301 is provided on one side of the first high-temperature resistant release film 3. The first high-temperature resistant release film 3 is used for protection before the first hot melt double-sided adhesive 2 is bonded, thereby reducing the possibility of the first hot melt double-sided adhesive 2 being affected by external dust before bonding, which would cause its adhesion to decrease. The tear handle 301 is used to assist in the removal of the first high-temperature resistant release film 3. That is, by pulling the tear handle 301, the first high-temperature resistant release film 3 can be easily torn off the first hot melt double-sided adhesive 2 for easy operation during use.

[0040] Further, such as Figure 1-Figure 2 As shown, a component area 103 is provided on the top surface of the FPC body 1. The position of the component area 103 corresponds to the position of the first hot-melt double-sided adhesive 2. That is, the part of the FPC body 1 corresponding to the component area 103 can be supported by the reinforcement plate 104 to improve the stability of the component setting.

[0041] Further, such as Figure 1 As shown, the FPC body 1 has an FPC gold finger 101, and an anti-foolproofing opening 102 is opened at the FPC gold finger 101. The anti-foolproofing opening 102 is located at a non-center position of the FPC gold finger 101. Since the anti-foolproofing opening 102 is located at a non-center position of the FPC gold finger 101, the anti-foolproofing opening 102 can play an anti-foolproofing function during use, thereby reducing the situation where the staff inserts the FPC gold finger 101 upside down during use.

[0042] Embodiment 3 of the FPC structure with double-sided adhesive of the utility model

[0043] This utility model further includes a double-sided adhesive FPC structure, such as... Figure 3-Figure 5 As shown, the FPC gold finger 101 is connected to the FPC connector 6, and an anti-fool protrusion 601 is provided in the FPC connector 6. The anti-fool protrusion 601 is plugged into the inner wall of the anti-fool mouth 102. The anti-fool protrusion 601 and the anti-fool mouth 102 cooperate with each other to play an anti-fool function when the FPC gold finger 101 is plugged into the FPC connector 6. That is, if the FPC gold finger 101 is inserted upside down, the FPC gold finger 101 cannot be fully inserted due to the setting of the anti-fool protrusion 601, thereby reminding the staff.

[0044] Further, such as Figure 3-Figure 6 As shown, a first connection frame 7 is fixedly mounted on the top of the FPC connector 6 , and a second connection frame 8 corresponding to the position of the first connection frame 7 is fixedly connected to the top of the FPC body 1 .

[0045] Further, such as Figure 3-Figure 5 As shown, a second high-temperature resistant release film 5 is also provided at the bottom of the FPC body 1, and a second hot-melt double-sided adhesive 4 is fixedly connected to the side of the tear handle 301 close to the second high-temperature resistant release film 5, and the second hot-melt double-sided adhesive 4 is bonded to the second high-temperature resistant release film 5. The setting of the second high-temperature resistant release film 5 can avoid direct bonding between the second hot-melt double-sided adhesive 4 and the FPC body 1, and the second hot-melt double-sided adhesive 4 can be torn off from the second high-temperature resistant release film 5.

[0046] Furthermore, the outer dimensions of the second hot-melt double-sided adhesive 4 are smaller than the outer dimensions of the tear handle 301. This arrangement ensures that the second hot-melt double-sided adhesive 4 will not cover the entire tear handle 301, thereby ensuring that the first high-temperature resistant release film 3 is less affected by the second hot-melt double-sided adhesive 4 when used.

[0047] Further, such as Figure 6 As shown, the first high-temperature resistant release film 3 is also used to cooperate with the first connecting frame 7 and the second connecting frame 8 after the first hot-melt double-sided adhesive 2 is applied to limit the position of the FPC body 1 and the FPC connector 6. Since the first high-temperature resistant release film 3 is torn off after the first hot-melt double-sided adhesive 2 is applied, the first high-temperature resistant release film 3 is then inserted between the first connecting frame 7 and the second connecting frame 8. The two ends of the first high-temperature resistant release film 3 are then bent and fixed between the first connecting frame 7 and the second connecting frame 8 using the second hot-melt double-sided adhesive 4. The reason for bending both ends of the high-temperature release film 3 is to allow the second hot melt double-sided adhesive 4 to be adhered to the non-release surface of the first high-temperature release film 3, thereby improving the firmness of the connection between the second hot melt double-sided adhesive 4 and the first high-temperature release film 3. At this time, the cooperation of the first high-temperature release film 3, the second hot melt double-sided adhesive 4, the first connecting frame 7 and the second connecting frame 8 can reinforce the connection between the FPC body 1 and the FPC connector 6, thereby reducing the possibility of the FPC gold finger 101 separating from the FPC connector 6 due to external force acting on the FPC body 1.

[0048] In use, pulling the tear handle 301 separates the first high-temperature release film 3 from the first hot melt double-sided adhesive 2, and the second hot melt double-sided adhesive 4 from the second high-temperature release film 5. After the FPC gold finger 101 is inserted into the FPC connector 6, the first hot melt double-sided adhesive 2 is pasted in the corresponding position. After inserting the first high-temperature release film 3 between the first connecting frame 7 and the second connecting frame 8, the two ends of the first high-temperature release film 3 are bent and fixed between the first connecting frame 7 and the second connecting frame 8 by the second hot melt double-sided adhesive 4. At this time, the cooperation of the first high-temperature release film 3, the second hot melt double-sided adhesive 4, the first connecting frame 7 and the second connecting frame 8 reinforces the relationship between the FPC body 1 and the FPC connector 6, thereby reducing the possibility of the FPC gold finger 101 separating from the FPC connector 6 due to external force on the FPC body 1.

[0049] Obviously, the embodiments described above are only some embodiments of this utility model, not all embodiments. The accompanying drawings show preferred embodiments of this utility model, but do not limit the patent scope of this utility model. This utility model can be implemented in many different forms; rather, the purpose of providing these embodiments is to provide a more thorough and comprehensive understanding of the disclosure of this utility model. Although this utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing specific embodiments, or make equivalent substitutions for some of the technical features. Any equivalent structures made using the content of this utility model specification and drawings, directly or indirectly applied to other related technical fields, are similarly within the patent protection scope of this utility model.

Claims

1. An FPC structure with double-sided adhesive, characterized in that: include: An FPC body (1), wherein a reinforcing plate (104) is arranged on the bottom surface of the FPC body (1), and a first hot-melt double-sided adhesive (2) is attached to a side of the reinforcing plate (104) away from the FPC body (1), wherein the first hot-melt double-sided adhesive (2) is used to achieve connection between the reinforcing plate (104) and the adhered body.

2. The FPC structure with double-sided adhesive according to claim 1, characterized in that: A first high temperature resistant release film (3) is provided on a side of the first hot melt double-sided adhesive (2) away from the FPC body (1), and a tearing handle (301) is provided on one side of the first high temperature resistant release film (3).

3. The FPC structure with double-sided adhesive according to claim 2, characterized in that: The first high temperature resistant release film (3) is used for protection before the first hot melt double-sided adhesive (2) is bonded, and the tear handle (301) is used to assist in tearing off the first high temperature resistant release film (3).

4. The FPC structure with double-sided adhesive according to claim 3, characterized in that: A component area (103) is provided on the top surface of the FPC body (1), and the position of the component area (103) corresponds to the position of the first hot-melt double-sided adhesive (2).

5. The FPC structure with double-sided adhesive according to claim 4, characterized in that: The FPC body (1) has an FPC gold finger (101), and an anti-foolproof opening (102) is provided at the FPC gold finger (101), wherein the anti-foolproof opening (102) is located at a non-central position of the FPC gold finger (101).

6. The FPC structure with double-sided adhesive according to claim 5, characterized in that: The FPC gold finger (101) is connected to an FPC connector (6), and an anti-fool-proofing protrusion (601) is provided inside the FPC connector (6), and the anti-fool-proofing protrusion (601) is plugged into the inner wall of the anti-fool-proofing opening (102).

7. The FPC structure with double-sided adhesive according to claim 6, characterized in that: A first connection frame (7) is fixedly mounted on the top of the FPC connector (6), and a second connection frame (8) corresponding to the position of the first connection frame (7) is fixedly connected to the top of the FPC body (1).

8. The FPC structure with double-sided adhesive according to claim 7, characterized in that: A second high temperature resistant release film (5) is also provided at the bottom of the FPC body (1), and a second hot melt double-sided adhesive (4) is fixedly connected to a side of the tear handle (301) close to the second high temperature resistant release film (5), and the second hot melt double-sided adhesive (4) is bonded to the second high temperature resistant release film (5).

9. The FPC structure with double-sided adhesive according to claim 8, characterized in that: The outer dimensions of the second hot-melt double-sided adhesive (4) are smaller than the outer dimensions of the tear handle (301).

10. The FPC structure with double-sided adhesive according to claim 9, characterized in that: The first high temperature resistant release film (3) is also used to cooperate with the first connection frame (7) and the second connection frame (8) to limit the position of the FPC body (1) and the FPC connector (6) after being bonded with the first hot melt double-sided adhesive (2).

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