FPC structure and manufacturing method
By adopting an integrated molded FPC structure with support substrate and aluminum substrate, the complex problem of traditional FPC structure processing is solved, and the effect of simplifying the process and improving efficiency is achieved.
Patent Information
- Application Number
- CN202510210459.2
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2025-02-25
- Publication Date
- 2025-03-25
- Estimated Expiration
- 2045-02-25
AI Technical Summary
During the processing of traditional FPC structures, window welding nickel sheets need to be reserved, resulting in complex and cumbersome processes.
The integrated molded FPC structure of supporting substrate and aluminum substrate is adopted to ensure the connection strength through aluminum substrate covering, reducing the processing time and cost of later welding nickel sheets.
The production process of FPC is simplified, processing efficiency is improved, processing steps is reduced, and costs are reduced.
Smart Images
Figure CN119697868A_ABST
Abstract
Description
Technical Field
[0001] The present application relates to the technical field of automotive electronics, and in particular to an FPC structure and a manufacturing method thereof. Background Art
[0002] Flexible Printed Circuit (FPC) is a printed circuit board made of flexible insulating substrate, which has the characteristics of being bendable and windable. It is widely used in aviation, aerospace, military, automobile and consumer electronics. In the field of automotive electronics, FPC boards are often used in vehicle brake control systems and other aspects to control and connect the mechanical structure inside the wheel.
[0003] The traditional FPC structure is mainly made of base material and conductive layer material, and the conductive layer material is generally made of copper. The connection port of the FPC to the external battery pack generally requires a larger connection strength. Since copper has its own large mass, in order to balance the quality and cost of the entire FPC, windows are usually reserved at the location where the battery pack is connected. In the later processing process, nickel sheets will be welded at these window positions and connected to the external battery pack through these nickel sheets.
[0004] Regarding the above-mentioned related technologies, FPC adopts a method of opening windows to weld nickel sheets during processing, and connecting external structures through the nickel sheets, which makes the process more complicated and cumbersome. Summary of the invention
[0005] In order to simplify the manufacturing process of FPC and improve processing efficiency, the present application provides an FPC structure and a manufacturing method.
[0006] In the first aspect, the present application provides an FPC structure, which adopts the following technical solution: An FPC structure comprises a supporting substrate and an aluminum substrate, wherein the supporting substrate comprises an integrally formed flexible board body and a flexible board connecting sheet, and the aluminum substrate covers the supporting substrate.
[0007] By adopting the above technical solution, the flexible board body and the flexible board connecting piece are directly formed in one piece, which greatly reduces the processing time and cost of subsequent welding of nickel sheets. At the same time, the conductive layer is made of aluminum. Compared with copper, aluminum is lighter and cheaper. The connection strength of the connecting piece can be ensured by thickening the aluminum substrate.
[0008] In a second aspect, the present application provides a method for manufacturing the above-mentioned FPC structure, comprising the following steps: Step 1: cutting and blanking, cutting the raw material consisting of the support substrate and the aluminum substrate into rectangular sheets required for production; Step 2: performing laser drilling on the rectangular sheet, wherein the same rectangular sheet has a plurality of the FPC structures; Step 3: Laminating a protective film on the rectangular sheet to protect the corresponding position on the aluminum substrate according to the FPC circuit; Step 4: Through exposure, development, and etching, the unprotected aluminum is corroded to expose the final circuit pattern; Step 5: Cover with a protective film to protect the formed circuit; at the same time, punch out the rectangular sheet according to the required shape of the FPC, and punch out the flexible board body and the flexible board connecting sheet as one piece.
[0009] By adopting the above technical solution, efficient production of FPC is achieved through a series of steps such as cutting, laser drilling, laminating protective film, exposure, development, etching and punching. In particular, in the process of cutting, the flexible board body and the flexible board connecting piece are punched and formed as one piece, which can reduce processing steps and improve processing efficiency.
[0010] Optionally, in step four, the rectangular sheet is etched using an etching device, the etching device comprising: a chassis, a conveying guide rail, a connecting component, a liquid medicine nozzle and a sheet material clamp; the sheet material clamp comprises two interconnected clamping frames, and the rectangular sheet material is clamped between the two clamping frames; the conveying guide rail is arranged in a ring along the length direction of the chassis, and one end of the conveying guide rail extends to the outside of the chassis, the connecting component is used to connect the sheet material clamp to the conveying guide rail, and the connecting component can move forward along the conveying guide rail under the drive of the conveying guide rail; the liquid medicine nozzles are respectively arranged on both sides of the conveying guide rail along the length direction of the conveying guide rail, and the liquid medicine nozzles all spray etching liquid in the direction of the conveying guide rail.
[0011] By adopting the above technical solution, the rectangular sheet is clamped and hoisted on the conveying guide rail, and the rectangular sheet is etched on both sides. This not only reduces the etching process flow and improves the etching efficiency, but also ensures that the etching progress on both sides of the rectangular sheet is the same due to the simultaneous etching of both sides, which can also improve the etching effect.
[0012] Optionally, the conveying guide rail includes a support frame, a guide rail body, a transmission chain, a sprocket and a power source, the connecting assembly includes a connecting rod and a first pulley arranged on the connecting rod, the guide rail body is mounted on the support frame, and a first slideway for the first pulley to slide is opened in the guide rail body; the sprocket is meshed with the transmission chain, the power source is used to drive the sprocket to rotate, and the upper end of the connecting rod is connected to the transmission chain.
[0013] By adopting the above technical solution, the circular transmission of rectangular sheets is realized. The conveying guide rail is composed of a support frame, a guide rail body, a transmission chain, a sprocket and a power source. Through the engagement of the sprocket with the transmission chain and the drive of the power source, the continuous movement of the connecting assembly and the sheet clamp is realized. The first pulley slides in the first slideway, which enhances the stability and smoothness of the movement and ensures the stable transmission of the sheet during the etching process.
[0014] Optionally, the etching device also includes a mounting plate, a mounting groove for mounting the sheet material clamp is provided in the mounting plate, and the mounting plate is provided with a makeshift hole running through both sides on the side wall of the mounting groove; the connecting component also includes a second pulley arranged at the lower end of the connecting rod, a second slideway for sliding of the second pulley is provided on the side wall of the mounting plate, and the connecting component also includes a flipping member for driving the mounting plate to rotate along its own axial direction.
[0015] Optionally, the flip member includes a first gear sleeved on the side wall of the mounting plate, and a first rack disposed on the guide rail body, and the first gear is meshed with the first rack.
[0016] By adopting the above technical solution, an installation groove is opened in the installation plate for installing the sheet material clamping plate, and the second pulley slides in the second slideway to realize flexible movement of the installation plate; the flip member drives the installation plate to rotate along its own axis direction through the engagement of the first gear and the first rack; the corrosion efficiency of the FPC structure at different positions on the rectangular sheet material can be kept consistent, thereby improving the etching effect.
[0017] Optionally, the chassis includes an etching area, a cleaning area and a drying area, the conveying rail passes through the three areas in sequence, the liquid medicine nozzles are all arranged in the etching area, cleaning nozzles are arranged on both sides of the conveying rail in the cleaning area, and electric heating tubes are arranged on both sides of the conveying rail in the drying area.
[0018] By adopting the above technical solution, the chassis is divided into etching area, cleaning area and drying area. The conveying rail passes through these three areas in sequence to complete the entire process of etching, cleaning and drying, thereby realizing continuous processing of the sheets after etching.
[0019] Optionally, the connecting assembly also includes a rotating member for driving the mounting disk to rotate in a vertical direction, and a limiting member for limiting the rotation of the mounting disk in a vertical direction. The limiting member and the flipping member are both arranged in the etching area and the cleaning area, and the rotation will be arranged in the drying area.
[0020] Optionally, the connecting rod includes a first rod at the upper end, and a second rod rotatably connected to the lower end of the first rod, the first pulley is arranged on the first rod, the second pulley is arranged on the second rod, the rotating member includes a second gear arranged on the side wall of the second rod, and a second rack arranged on the side wall of the guide rail body, the second gear and the second rack are meshed with each other, and the second rack is arranged in the drying area.
[0021] Optionally, the limiting member includes a limiting block arranged on the side wall of the second rod, and a limiting strip arranged on the side wall of the guide rail body, the limiting strip being arranged in the etching area and the cleaning area, and the sides of the limiting block and the limiting strip close to each other are parallel and fit together.
[0022] By adopting the above technical solution, through the cooperation of the rotating part and the limiting part, the installation disk can be flipped in the etching area and the cleaning area with the cooperation of the flipping part and the limiting part to improve the etching effect; in the drying area, it can be rotated quickly to improve the drying efficiency.
[0023] In summary, the present application includes at least one of the following beneficial effects: 1. The integrated cutting and forming of the FPC structure improves the production efficiency of FPC; 2. Through the integrated etching device and automated conveying guide design, continuous and stable conveying and etching processing of sheets are achieved, which significantly improves etching efficiency and quality. BRIEF DESCRIPTION OF THE DRAWINGS
[0024] Figure 1 It is a structural diagram of the FPC structure; Figure 2 is a schematic diagram of the structure of an etching device; Figure 3 It is a schematic diagram of the structure of the conveyor track; Figure 4 It is a schematic diagram of the exploded structure of the installation plate; Figure 5 It is a schematic diagram of the structure of the connecting components in the etching area; Figure 6 It is a schematic diagram of the structure of the connection components in the drying area.
[0025] Description of reference numerals: 101, rectangular sheet; 1, FPC structure; 11, supporting substrate; 12, aluminum substrate; 13, flexible board body; 14, flexible connecting sheet; 2, chassis; 21, etching area; 22, cleaning area; 221, cleaning nozzle; 23, drying area; 231, electric heating pipe; 3, conveying guide rail; 31, supporting frame; 32, guide rail body; 321, first slideway; 33, transmission chain; 34, sprocket; 35, power source; 4, connecting assembly; 4 1. Connecting rod; 411. First rod; 412. Second rod; 42. First pulley; 43. Second pulley; 44. Turning member; 441. First gear; 442. First rack; 45. Rotating member; 451. Second gear; 452. Second rack; 46. Limiting member; 461. Limiting block; 462. Limiting strip; 5. Liquid medicine nozzle; 6. Sheet material clamping plate; 7. Mounting plate; 71. Mounting groove; 72. Second slideway; 8. Loading assembly line; 9. Unloading assembly line. DETAILED DESCRIPTION
[0026] The following is combined with Figure 1-6 This application is described in further detail. Example
[0027] An FPC structure 1 provided in an embodiment of the present application is referred to Figure 1 , the FPC structure 1 includes a supporting substrate 11 and an aluminum substrate 12, and the supporting substrate 11 includes a flexible board body 13 and a flexible board connecting piece, and the flexible board body 13 is partially formed in one piece with the flexible board connecting piece, and the aluminum substrate 12 covers the supporting substrate 11, that is, the circuit part on the flexible board body 13 and the flexible board connecting piece are covered with the aluminum substrate 12; the conductive layer is made of aluminum material, which is lighter and cheaper than copper material, and the connection strength of the connecting piece can be ensured by thickening the aluminum substrate 12. Therefore, compared with the related art, the FPC structure 1 in this embodiment does not need to reserve a window position, and weld the nickel sheet later, and directly adopts an integrated molding method to cover the connecting piece with aluminum material, which greatly reduces the processing time and processing cost.
[0028] Reference Figure 1 In this embodiment, the aluminum substrate 12 is disposed on both sides of the support substrate 11, that is, it is configured as a double-sided board. In other embodiments, the aluminum substrate 12 can also be covered on one side and configured as a single-sided board.
[0029] Specifically, in this embodiment, the flexible board body 13 is made of one or more materials selected from polyimide (PI), polyester film (PET), and polyethylene naphthalate (PEN). As a part of the conductive layer, the aluminum substrate 12 directly affects the conductive performance and wear resistance of the FPC. This embodiment uses an aluminum substrate 12 with a thickness of 70um to 130um, and preferably an aluminum substrate 12 with a thickness of 100um, so that it can have better connection strength in the automotive field. The aluminum substrate 12 is preferably fixedly covered on the surface of the supporting substrate 11 by hot pressing, and is cut and processed together with the supporting substrate 11.
[0030] The implementation principle of an FPC structure 1 in an embodiment of the present application is: a supporting substrate 11 and an aluminum substrate 12 are integrally formed into a flexible board main body 13 and a flexible board connecting piece, and there is no need to weld a nickel sheet later, which can reduce processing time and improve production efficiency; at the same time, by using an aluminum substrate 12 instead of a copper substrate, the thickness of the conductive layer can be thickened while balancing the weight and price of the FPC structure 1, thereby ensuring the connection strength at the flexible board connecting piece. Example
[0031] An FPC manufacturing method provided in an embodiment of the present application is mainly used to produce the FPC structure 1 in Example 1, and mainly includes the following steps: Step 1: Cutting and blanking: cutting the raw material consisting of the support substrate 11 and the aluminum substrate 12 into rectangular sheets 101 of required specifications.
[0032] Step 2: Laser drilling is performed on the cut rectangular sheet 101, and a high-precision laser is used to generate multiple through holes on the same sheet surface for subsequent circuit routing. It should be noted that multiple FPC structures 1 are produced simultaneously on the same rectangular sheet 101.
[0033] Step three: Laminating a protective film on the rectangular sheet 101 to protect the corresponding position on the aluminum substrate 12 according to the FPC circuit; when laminating the protective film, the front and back sides of the FPC structure 1 need to be protected respectively.
[0034] Step 4: The unprotected aluminum material is corroded away through exposure, development, and etching, and the remaining aluminum substrate 12 forms the final circuit pattern.
[0035] Step 5: The last step is to cover the protective film to protect the formed circuit, and at the same time, the rectangular sheet 101 is punched according to the required FPC shape. It should be noted that at this time, the two parts of the flexible board body 13 and the flexible board connecting sheet are cut and formed as one piece.
[0036] In step 4 of the embodiment of the present application, the rectangular sheet 101 is etched mainly by an etching device. In the related art, the etching of the rectangular sheet 101 is generally performed by placing the rectangular sheet flat on the surface of a conveyor belt, and then feeding it into a corresponding etching machine, and etching the conductive base layer by spraying a liquid on the surface of the rectangular sheet 101. After the front etching is completed, it is cleaned and turned over, and then fed into another etching machine again to etch the back side, thereby completing the double-sided etching of the rectangular sheet 101. The entire etching process is relatively cumbersome and inefficient.
[0037] Reference Figure 2 and Figure 3 In the embodiment of the present application, the rectangular sheet 101 is hoisted to perform synchronous etching on the two square surfaces of the rectangular sheet 101. Specifically, the etching device includes a chassis 2, a conveying guide 3, a connecting component 4, a liquid medicine nozzle 5 and a sheet material clamp 6. Among them, the sheet material clamp 6 is used to clamp and position the rectangular sheet 101, and the connecting component 4 can clamp the sheet material clamp 6 on the conveying guide 3. It should be noted that the front and back sides of the sheet material clamp 6 face the two sides of the conveying guide 3 respectively; the conveying guide 3 is arranged in a ring along the length direction of the chassis 2, and one end of the conveying guide extends to the outside of the chassis 2. The liquid medicine nozzle 5 is symmetrically and evenly distributed on both sides of the conveying guide 3, and the liquid medicine is sprayed in the direction of the guide, that is, towards the two square surfaces of the sheet material clamp 6. The etching liquid is preferably an acidic copper sulfate solution. Double-sided etching by the above etching device can not only reduce the etching process flow and improve the etching efficiency, but also ensure that the etching progress on both sides of the rectangular sheet 101 is the same due to the simultaneous etching of both sides, thereby improving the etching effect.
[0038] Reference Figure 3 and Figure 4 In this embodiment, the sheet material clamping plate 6 includes two mutually connected clamping plate frames, the cross section of the clamping plate frame is a "U" shape, and the peripheral edge of the rectangular sheet material 101 is clamped between the two clamping plate frames. The two clamping plate frames can be connected to each other by clamping or by countersunk bolts.
[0039] Reference Figure 3 and Figure 5In this embodiment, the conveying guide rail 3 includes a support frame 31, a guide rail body 32, a transmission chain 33, a sprocket 34 and a power source 35; the connecting assembly 4 includes a connecting rod 41 and a first pulley 42 arranged on the connecting rod 41, and the sheet clamping plate 6 is connected to the lower end of the connecting rod 41. The guide rail body 32 is mounted on the support frame 31, and a first slideway 321 for the first pulley 42 to slide is provided in the guide rail body 32. The first slideway 321 extends along the length direction of the guide rail body 32, and the first slideway 321 is provided with a slot toward the outer wall, so that the rotating shaft connected to the first pulley 42 extends out of the guide rail body 32, and the first pulley 42 is rotatably mounted on the side wall of the connecting rod 41 through the rotating shaft. The transmission chain 33 is annularly arranged above the guide rail body 32, and the sprocket 34 is rotatably arranged on the chassis 2, and the sprocket 34 is meshed with the transmission chain 33. The power source 35 is used to drive the sprocket 34 to rotate, and the power source 35 can be a power device such as a motor. The upper end of the connecting rod 41 extends upward below the transmission chain 33. The lower surface of the transmission chain 33 can be connected to the support and is connected to the upper surface of the connecting rod 41 through the support. As the transmission chain 33 rotates, it can drive the connecting rod 41 to move forward along the transmission chain 33 and drive the sheet clamp 6 and the rectangular sheet 101 to move. The first pulley 42 slides in the first slideway 321 to guide and stabilize the connecting rod 41.
[0040] Reference Figure 4 and Figure 5 In the embodiment of the present application, the etching device further includes a mounting plate 7, which is a circular plate. A mounting groove 71 for mounting the sheet material clamping plate 6 is provided in the mounting plate 7, and a clearance hole penetrating through both sides is provided on the side wall of the mounting groove 71 of the mounting plate 7, and the clearance hole and the mounting groove 71 form a step shape; when the sheet material clamping plate 6 is clamped in the mounting groove 71, the liquid medicine nozzle 5 can spray onto the side wall of the rectangular sheet material 101 through the clearance hole. In order to facilitate loading and unloading, the sheet material clamping plate 6 and the mounting plate 7 can be fixed by magnetic attraction or interference fit.
[0041] Reference Figure 3 and Figure 5 In the embodiment of the present application, the connection assembly 4 further includes a second pulley 43 disposed at the lower end of the connection rod 41, and the second pulley 43 is also rotatably mounted on the side wall of the connection rod 41 by means of a rotating shaft; a second slideway 72 for the second pulley 43 to slide is provided on the side wall of the mounting plate 7, and the second slideway 72 is provided in a circular shape along the side wall of the mounting plate 7. The connection assembly 4 further includes a flip member 44 for driving the mounting plate 7 to rotate along its own axis direction, and correspondingly, when the mounting plate 7 rotates, the second pulley 43 slides along the second slideway 72.
[0042] Reference Figure 3 and Figure 5In the present embodiment of the application, the flipping member 44 includes a first gear 441 sleeved on the outer wall of the mounting plate 7, and a first rack 442 fixed to the lower surface of the guide rail body 32, the first rack 442 extends along the length direction of the guide rail body 32, and the first gear 441 meshes with the first rack 442. When the mounting plate 7 moves forward under the drive of the connecting rod 41 by the transmission chain 33, the first gear 441 on the outer side of the mounting plate 7 meshes with the second rack 452, and under the cooperation, the mounting plate 7 is flipped forward, so that the rectangular sheet 101 on the mounting plate 7 can be slowly flipped. Each rectangular sheet 101 has a plurality of FPC structures 1. When the chemical solution is sprayed onto the rectangular sheet 101, it will flow downward under the action of gravity. In this case, the conductive layer, i.e., the aluminum substrate 12, on the FPC structure 1 at the lower end may be corroded faster, while the conductive layer at the upper end may be corroded relatively slowly, resulting in the difficulty in maintaining consistent corrosion degrees of the FPC structures 1 on the same rectangular sheet 101, thus affecting the quality of the FPC structures 1. By flipping the rectangular sheet 101 through the flipping member 44, the etching efficiency of the FPC structures 1 at different positions on the rectangular sheet 101 can be kept consistent.
[0043] Reference Figure 2 and Figure 3 In an optional embodiment, the chassis 2 is divided into an etching area 21, a cleaning area 22 and a drying area 23. The conveying rail 3 passes through these three areas in sequence, and the size of each area can be distributed according to the actual processing time. Different areas are separated by baffles or shielding curtains. The liquid medicine nozzles 5 are all arranged in the etching area 21 to etch the rectangular sheet 101; cleaning nozzles 221 are arranged on both sides of the conveying rail 3 in the cleaning area 22 to spray clean water or cleaning liquid to clean the rectangular sheet 101 and rinse off the residual liquid medicine on the rectangular sheet 101; electric heating pipes 231 are arranged on both sides of the conveying rail 3 in the drying area 23 to dry the rectangular sheet 101.
[0044] Reference Figure 5 and Figure 6Furthermore, the connecting assembly 4 further includes a rotating member 45 for driving the mounting plate 7 to rotate in the vertical direction, and a stopper 46 for limiting the mounting plate 7 from rotating in the vertical direction. The connecting rod 41 includes a first rod 411 at the upper end and a second rod 412 at the lower end, wherein the first rod 411 is connected to the transmission chain 33, and the first pulley 42 is disposed on the first rod 411; the upper end of the second rod 412 is rotatably connected to the lower end of the first rod 411 by means of a bearing or the like, and the second pulley 43 is disposed on the side wall of the second rod 412. The rotating member 45 includes a second gear 451 arranged on the side wall of the second rod 412, and a second rack 452 arranged on the side wall of the guide rail body 32, and the second rack 452 is only arranged on the part of the guide rail body 32 located in the drying area; when the connecting rod 41 enters the drying area, the second gear 451 and the second rack 452 are engaged with each other, which can drive the second rod 412 to rotate in the vertical direction; since the diameter of the second gear 451 is relatively small, the rotation speed of the mounting plate 7 is faster, which can dry out moisture while baking, thereby improving the drying efficiency.
[0045] Reference Figure 5 and Figure 6 The limiting member 46 includes a limiting block 461 disposed on the side wall of the second rod 412, and a limiting strip 462 disposed on the side wall of the guide rail body 32. The limiting block 461 is preferably a rectangular block, and the limiting strip 462 is also rectangular in cross section. It extends along the guide rail body 32 into the etching area 21 and the cleaning area 22. When the connecting rod 41 moves into these two areas, the side wall of the limiting block 461 abuts against the side wall of the limiting strip 462, thereby limiting the rotation of the second rod 412. When the connecting rod 41 moves into the drying area, the connecting rod 41 is contact-controlled and can rotate under the action of the rotating member 45. Correspondingly, the first rack 442 also only extends into the etching area 21 and the cleaning area 22. After the connecting rod 41 enters the drying area 23, the mounting plate 7 stops flipping.
[0046] Reference Figure 1 In an optional embodiment, a loading assembly line 8 and a unloading assembly line 9 can be arranged outside the chassis 2 to facilitate loading and unloading of rectangular sheets 101. The loading assembly line 8 and the unloading assembly line 9 are both arranged at a section where the conveying guide rail 3 extends out of the chassis 2. At the same time, a manipulator can be arranged at the connection between the loading assembly line 8 and the unloading assembly line 9 and the chassis 2 for loading and unloading, and a suction plate is arranged on the manipulator for taking and placing the sheet clamping plate 6, thereby realizing automatic loading and unloading production.
[0047] The implementation principle of an FPC manufacturing method in an embodiment of the present application is: by cutting the raw materials to form the flexible board body 13 and the flexible board connecting plate in the FPC structure 1 as one piece, and replacing the copper substrate with a thicker aluminum substrate 12, the process flow of welding nickel sheets can be reduced, and the processing efficiency is higher.
[0048] At the same time, in the etching process of the FPC structure 1, a method of clamping and hoisting the rectangular sheet 101 is adopted to simultaneously etch both sides of the rectangular sheet 101, which not only improves the processing efficiency, but also makes the etching effect on the front and back sides of the rectangular sheet 101 the same; further, by setting a flip member 44, the rectangular sheet 101 is driven to rotate during etching, so that the etching efficiency of all FPC structures 1 located on the same rectangular sheet 101 is the same, avoiding the problem of partial over-etching or partial under-etching caused by different efficiencies, thereby improving the etching quality.
[0049] The above are all preferred embodiments of the present application, and the protection scope of the present application is not limited thereto. Therefore, any equivalent changes made according to the structure, shape, and principle of the present application should be included in the protection scope of the present application.
Claims
1. An FPC structure, characterized in that: It comprises a supporting substrate (11) and an aluminum substrate (12), wherein the supporting substrate (11) comprises an integrally formed flexible board body (13) and a flexible board connecting sheet, and the aluminum substrate (12) covers the supporting substrate (11).
2. A method for manufacturing an FPC, used for manufacturing the FPC structure according to claim 1, characterized in that: The following steps are involved: Step 1: cutting and blanking, cutting the raw material consisting of the support substrate (11) and the aluminum substrate (12) into rectangular sheets (101) required for production; Step 2: performing laser drilling on the rectangular sheet (101), wherein the same rectangular sheet (101) has a plurality of the FPC structures (1); Step three: laminating a protective film on the rectangular sheet (101) to protect the corresponding position on the aluminum substrate (12) according to the FPC circuit; Step 4: Through exposure, development, and etching, the unprotected aluminum is corroded to expose the final circuit pattern; Step five: Covering with a protective film to protect the formed circuit; at the same time, punching the rectangular sheet (101) according to the required shape of the FPC, and punching the flexible board body (13) and the flexible board connecting sheet into an integral shape.
3. A method for manufacturing an FPC according to claim 2, characterized in that: In the step 4, the rectangular sheet (101) is etched using an etching device, the etching device comprising: a chassis (2), a conveying guide rail (3), a connecting component (4), a liquid medicine nozzle (5) and a sheet material clamp (6); the sheet material clamp (6) comprises two mutually connected clamp frames, and the rectangular sheet material (101) is clamped between the two clamp frames; the conveying guide rail (3) is arranged in a ring shape along the length direction of the chassis (2), and one end of the conveying guide rail (3) extends outside the chassis (2); the connecting component (4) is used to connect the sheet material clamp (6) to the conveying guide rail (3), and the connecting component (4) can move forward along the conveying guide rail (3) under the drive of the conveying guide rail (3); the liquid medicine nozzle (5) is respectively arranged on both sides of the conveying guide rail (3) along the length direction of the conveying guide rail (3), and the liquid medicine nozzle (5) sprays the etching liquid in the direction of the conveying guide rail (3).
4. A method for manufacturing an FPC according to claim 3, characterized in that: The conveying guide rail (3) comprises a support frame (31), a guide rail body (32), a transmission chain (33), a sprocket (34) and a power source (35); the connecting assembly (4) comprises a connecting rod (41) and a first pulley (42) arranged on the connecting rod (41); the guide rail body (32) is mounted on the support frame (31), and a first slideway (321) is provided in the guide rail body (32) for the first pulley (42) to slide; the sprocket (34) is meshed with the transmission chain (33); the power source (35) is used to drive the sprocket (34) to rotate; and the upper end of the connecting rod (41) is connected to the transmission chain (33).
5. A method for manufacturing an FPC according to claim 4, characterized in that: The etching device further comprises a mounting plate (7), wherein a mounting groove (71) for mounting the sheet material clamping plate (6) is provided in the mounting plate (7), and a clearance hole penetrating through both sides is provided on the side wall of the mounting groove (71); the connecting component (4) further comprises a second pulley (43) arranged at the lower end of the connecting rod (41), and a second slideway (72) for sliding the second pulley (43) is provided on the side wall of the mounting plate (7); the connecting component (4) further comprises a flip member (44) for driving the mounting plate (7) to rotate along its own axis direction.
6. A method for manufacturing an FPC according to claim 5, characterized in that: The flip member (44) comprises a first gear (441) sleeved on the side wall of the mounting plate (7), and a first rack (442) arranged on the guide rail body (32), the first gear (441) meshing with the first rack (442).
7. A method for manufacturing an FPC according to claim 5, characterized in that: The chassis (2) comprises an etching area (21), a cleaning area (22) and a drying area (23); the conveying rail (3) passes through the three areas in sequence; the liquid medicine nozzles (5) are all arranged in the etching area (21); cleaning nozzles (221) are arranged on both sides of the conveying rail (3) in the cleaning area (22); and electric heating pipes (231) are arranged on both sides of the conveying rail (3) in the drying area (23).
8. A method for manufacturing an FPC according to claim 7, characterized in that: The connecting assembly (4) further comprises a rotating member (45) for driving the mounting plate (7) to rotate in a vertical direction, and a limiting member (46) for limiting the mounting plate (7) from rotating in a vertical direction. The limiting member (46) and the flip member (44) are both arranged in the etching area (21) and the cleaning area (22), and the rotating member is arranged in the drying area (23).
9. A method for manufacturing an FPC according to claim 8, characterized in that: The connecting rod (41) comprises a first rod (411) at an upper end and a second rod (412) rotatably connected to a lower end of the first rod (411); the first pulley (42) is arranged on the first rod (411); the second pulley (43) is arranged on the second rod (412); the rotating member (45) comprises a second gear (451) arranged on a side wall of the second rod (412) and a second rack (452) arranged on a side wall of the guide rail body (32); the second gear (451) and the second rack (452) are meshed with each other; and the second rack (452) is arranged in a drying area (23).
10. A method for manufacturing an FPC according to claim 9, characterized in that: The limiting member (46) comprises a limiting block (461) arranged on the side wall of the second rod (412), and a limiting strip (462) arranged on the side wall of the guide rail body (32); the limiting strip (462) is arranged in the etching area (21) and the cleaning area (22); and the sides of the limiting block (461) and the limiting strip (462) that are close to each other are parallel to each other and fit together.
Citation Information
Patent Citations
Precession type conveyor and conveying method
CN104144574A
Circuit body equipped with connector and bus bar module
CN110707272A
Temperature detection structure of FPC wire row
CN210202177U
Acquisition FPC wire row
CN210579431U
Plating device
JP1996100296A