Flexible circuit forming machine and method of making same

Abstract

The application discloses a flexible circuit forming machine and a manufacturing method thereof, and relates to the technical field of flexible circuit manufacturing.The device comprises a support assembly, a laser assembly, a spraying assembly, a rolling assembly and a control assembly, a graphene pattern is formed on the surface of a polyimide film through scanning by a 450nm blue light semiconductor laser, curing is carried out through twice spraying of special three-proofing paint for circuit boards, and finally, rolling and packaging are carried out through a flexible silica gel film.The application provides a device and a method for low-cost preparation of a flexible conductive circuit, a strain sensor and a low-voltage electric heating device, and the device is small in size and convenient to operate, and is suitable for teaching demonstration, maker design and other scenes.

Description

Technical Field

[0001] This invention patent relates to the field of flexible circuit manufacturing technology, specifically to a flexible circuit forming machine and its manufacturing method. Background Technology

[0002] Traditional flexible circuits require custom manufacturing on specialized production lines using processes such as photolithography and chemical deposition, resulting in high equipment costs, long delivery cycles, and overall high cost. Laser-induced graphene (LIG) technology was first proposed in 2014 by James Tour, a chemist at Rice University. This technology involves laser sintering away non-carbon components from polyimide polymers or other materials, allowing carbon atoms to recombine and form conductive graphene. However, existing LIG equipment primarily uses CO2 lasers (10.6 μm wavelength), which suffer from high laser operating costs, low electro-optical efficiency, and the tendency for the sintered graphene to detach, hindering the widespread application of LIG technology in flexible circuit fabrication and applications. Summary of the Invention

[0003] The purpose of this invention is to provide a flexible circuit forming machine and its manufacturing method to solve the problems mentioned in the background art.

[0004] To address the aforementioned technical problems, this invention provides the following technical solution: a flexible circuit forming machine, comprising: a support assembly including a horizontal frame, a moving crossbeam, and a front-to-back moving drive mechanism; a laser assembly including a laser, a laser support, and a left-to-right moving drive mechanism; a spraying assembly including a storage box, a peristaltic pump, a nozzle that can align with the laser path, and a synchronous spraying drive mechanism; a roll forming assembly including a flexible rubber roller and a moving platform mechanism; a control assembly for coordinating the automated control of multiple processes including laser sintering, conformal coating spraying, and roll forming encapsulation; and a flexible substrate, which is the object to be laser sintered and used to generate flexible conductive patterns.

[0005] Furthermore, the forward and backward movement drive mechanism includes a beam drive motor, a beam belt, beam rollers, a transmission rod, and beam pulleys. The beam drive motor is fixed to one side of the moving beam. The transmission rod is fixedly mounted on the output shaft of the beam drive motor. A beam pulley is mounted on each side of the transmission rod near the two ends of the moving beam. The beam belt is mounted on the beam pulleys, and both ends of the beam belt are fixed to the horizontal frame. The beam pulleys are toothed pulleys, and the beam belt is a toothed belt. The beam rollers are located on both sides of the beam pulleys and are used to press the beam belt against the beam pulleys. When the beam drive motor rotates, it drives the transmission rod to rotate the beam pulleys on both sides synchronously. The beam pulleys move along the beam belt, thereby driving the moving beam to move along the beam belt, thus achieving the purpose of driving the laser assembly to move forward and backward.

[0006] Furthermore, the left-right movement drive mechanism includes a laser bracket drive motor, a laser bracket pulley, laser bracket rollers, and a laser bracket belt. The laser and the laser bracket drive motor are respectively fixed on the front and rear sides of the laser bracket. The laser bracket pulley is mounted on the output shaft of the laser bracket drive motor, and a laser bracket roller is mounted on each side of the laser bracket pulley. When the laser bracket drive motor rotates, it drives the laser bracket pulley to rotate, thereby driving the laser assembly to move along the laser bracket belt, achieving the purpose of driving the laser assembly to move left and right.

[0007] Furthermore, the spraying assembly also includes a spraying bracket, an inlet pipe, an outlet pipe, and a nozzle bracket. The synchronous spraying drive mechanism includes a spraying drive motor, a moving block, slide rods, and a lead screw. The storage box contains circuit board-specific conformal coating. Both the storage box and the peristaltic pump are fixedly mounted on the spraying bracket, which is fixed to the moving crossbeam. The inlet pipe of the peristaltic pump is embedded in the storage box, and the outlet pipe of the peristaltic pump is connected to the nozzle bracket. The nozzle bracket has a through channel through which the conformal coating is delivered to the nozzle. The nozzle bracket is fixedly connected to the moving block via two slide rods, which pass through the front end of the laser bracket. The moving block has a threaded hole in the middle, and the lead screw passes through the threaded hole of the moving block. One end of the lead screw is fixed to the front end of the laser bracket, and the other end is fixedly connected to the output shaft of the spraying drive motor. When the spraying drive motor rotates, it drives the nozzle bracket to move the nozzle back and forth.

[0008] Furthermore, the roller pressing assembly also includes a roller support, and the moving platform mechanism includes a moving platform, a moving platform drive motor, moving platform pulleys, moving platform rollers, and a moving platform belt; there is one roller support on each side and it is fixed to the horizontal frame. A bearing is installed at the center of the roller support, and the two ends of the roller are fixed to the inner holes of the bearings; the moving platform is located below the roller, and the gap between the moving platform and the roller is 0-0.3mm; four rollers are provided at the left and right ends of the moving platform, and the rollers are engaged in the grooves of the horizontal frame, allowing the moving platform to move smoothly back and forth; the moving platform drive motor is installed on one side of the bottom of the moving platform, and the moving platform pulley is fixed on the output shaft of the driving motor. The moving platform belt is installed on the pulley, and the two ends of the belt are fixed to the horizontal frame. The rollers press the belt against the pulley. When the driving motor rotates, it drives the pulley to rotate, thereby moving the platform back and forth.

[0009] Furthermore, the laser is a blue laser with a wavelength of about 450nm, an optical power range of 2.5-3.5W, a scanning rate range of 2000-2100mm / min, and a sintering point number range of 10-13 dots / mm, in order to generate a graphene conductive pattern, and the flexible substrate is a polyimide film.

[0010] Furthermore, the pressure roller is a composite structure consisting of a metal core layer and a rubber outer layer with a Shore hardness of 65±5.

[0011] A method for fabricating a flexible circuit includes the following steps:

[0012] Step 1: Two laser sintering processes are used to form a graphene conductive pattern;

[0013] Step 2: Apply two coats of conformal coating and allow them to cure.

[0014] Step 3: Laying the conductive lead-out layer;

[0015] Step 4: Flexible silicone film roll forming encapsulation.

[0016] The beneficial effects achieved by this invention patent are as follows: A graphene conductive pattern is formed by sintering the surface of a polyimide film twice with a blue laser at specific optical power and scanning rate. Then, a circuit board-specific conformal coating is sprayed onto the surface of the polyimide film to perform a first curing of the graphene pattern to prevent graphene from falling off. After the conformal coating has cured, a second conformal coating is sprayed and cured again. Then, a conductive lead-out layer is laid. Finally, a flexible silicone film is covered on the surface of the graphene pattern and rolled with a pressure roller to integrate the flexible silicone film and the polyimide film into one unit, completing the encapsulation. This flexible circuit molding machine is small in size and low in cost. It is a desktop flexible circuit molding machine that can quickly and cost-effectively produce flexible conductive circuits, suitable for makers to make various flexible circuits themselves. Attached Figure Description

[0017] Figure 1 This is a side view of a flexible circuit forming machine as described in the embodiment.

[0018] Figure 2 This is a rear view schematic diagram of a flexible circuit forming machine according to an embodiment;

[0019] Figure 3 This is a schematic diagram of the support assembly in the embodiment;

[0020] Figure 4 As in the embodiments Figure 3 Enlarged schematic diagram of the structure of region A in the middle;

[0021] Figure 5 This is a schematic diagram of the laser component in the embodiment;

[0022] Figure 6 This is a schematic diagram of the side front view structure of the spraying assembly in the embodiment;

[0023] Figure 7 This is a side right view of the structure of the spraying assembly in the embodiment when it is not in operation;

[0024] Figure 8 As in the embodiments Figure 6 Enlarged front view of the structure of region B in the middle;

[0025] Figure 9 This is a side right view of the spraying assembly in operation in the embodiment.

[0026] Figure 10 This is a schematic diagram of the roller pressing assembly structure in the embodiment;

[0027] Figure 11 As in the embodiments Figure 10 Schematic diagram of the cross-sectional structure in the middle CC direction;

[0028] Figure 12 As in the embodiments Figure 10 Schematic diagram of the D-direction structure;

[0029] Figure 13 This is a schematic diagram of the pressure roller and pressure roller support structure in the embodiment. Detailed Implementation

[0030] The present invention will be further described below with reference to the accompanying drawings.

[0031] like Figure 1 , 2 As shown, the flexible circuit forming machine includes a support assembly 100, a laser assembly 200, a spraying assembly 300, a rolling assembly 400, and a control assembly 500. The support assembly 100 provides support. The laser assembly 200 emits a laser beam. The spraying assembly 300 applies a conformal coating specifically for circuit boards, a mature product on the market. The rolling assembly 400 supports the polyimide film 600 and rolls the silicone film onto the polyimide film 600, which is not shown in the diagram but covers the polyimide film 600. The control assembly 500 controls the forward, backward, left, and right movement of the laser assembly 200, the spraying operation of the spraying assembly 300, and the rolling operation of the rolling assembly 400.

[0032] like Figure 3 and Figure 4 As shown, the support assembly 100 includes a horizontal frame 101, a movable crossbeam 102, a crossbeam drive motor 103, a crossbeam belt 104, a crossbeam roller 105, a transmission rod 106, and a crossbeam pulley 107. The crossbeam drive motor 103 is fixed to one side of the movable crossbeam 102. A transmission rod 106 is fixedly mounted on the output shaft of the crossbeam drive motor 103. A crossbeam pulley 107 is mounted on each side of the transmission rod 106 near the two ends of the movable crossbeam 102. A crossbeam belt 104 is mounted on the crossbeam pulley 107, and both ends of the crossbeam belt 104 are fixed to the horizontal frame 101. The crossbeam pulley 107 is a toothed pulley, and the crossbeam belt 104 is a toothed belt. The crossbeam rollers 105 are disposed on both sides of the crossbeam pulleys 107 along the extension direction of the crossbeam belt 104, and the crossbeam rollers 105 are used to press the crossbeam belt 104 onto the crossbeam pulleys 107. When the crossbeam drive motor 103 rotates, the drive motor 103 drives the two crossbeam pulleys 107 on both sides to rotate synchronously through the transmission rod 106. The crossbeam pulleys 107 move back and forth along the crossbeam belt 104 through mutual meshing and transmission, thereby driving the moving crossbeam 102 to move back and forth along the crossbeam belt 104, so as to achieve the purpose of driving the laser component 200 to move back and forth.

[0033] like Figure 1 and 5As shown, the laser assembly 200 includes a laser 201, a laser bracket 202, a laser bracket drive motor 203, a laser bracket pulley 204, laser bracket rollers 205, and a laser bracket belt 206. The laser 201 and the laser bracket drive motor 203 are fixed to the front and rear sides of the laser bracket 202, respectively. The laser bracket pulley 204 is mounted on the output shaft of the laser bracket drive motor 203, and a laser bracket roller 205 is mounted diagonally below each side of the laser bracket pulley 204. When the laser bracket drive motor 203 rotates, it drives the laser bracket pulley 204 to rotate, thereby driving the laser assembly 200 to move along the laser bracket belt 206, achieving the purpose of driving the laser head 2011 to move left and right.

[0034] like Figure 6 and Figure 7 As shown, the spraying assembly 300 includes a storage box 301, a peristaltic pump 302, a spraying bracket 303, an inlet pipe 304, an outlet pipe 305, a nozzle bracket 306, a nozzle 307, a spraying drive motor 308, a moving block 309, a slide bar 310, and a lead screw 311. The storage box 301 contains a circuit board-specific conformal coating, such as acrylic or polyurethane conformal coating. Both the storage box 301 and the peristaltic pump 302 are fixedly mounted on the spraying bracket 303, which is fixed to the moving crossbeam 102. The inlet pipe 304 of the peristaltic pump 302 is embedded in the storage box 301, and the other end of the outlet pipe 305 of the peristaltic pump 302 is connected to the nozzle bracket 306. The reason for using a peristaltic pump 302 is that its working principle is to drive the liquid through compression. On the one hand, it does not require negative pressure pumping; even if the conformal coating level in the storage box 301 is lower than the peristaltic pump 302, it can still pump normally. On the other hand, when not pumping, the flexible tubing inside the peristaltic pump 302 is compressed, which acts as a seal to prevent the conformal coating from drying and hardening. Furthermore, as... Figure 8 As shown, the nozzle holder 306 has a through channel 3601 inside, through which the conformal coating is delivered to the nozzle 307.

[0035] like Figure 7 As shown, the nozzle holder 306 is fixedly connected to the movable block 309 via two slide rods 310, which pass through the front end of the laser holder 202. The movable block 309 has a threaded hole in the middle, through which a lead screw 311 passes and is threadedly connected to the other. One end of the lead screw 311 is fixed to the front end of the laser holder 202, and the other end is fixedly connected to the output shaft of the spraying drive motor 308. When the spraying drive motor 308 rotates, it drives the nozzle holder 306 to move the nozzle 307 back and forth.

[0036] The specific principle is as follows: Figure 7 , 9As shown. When the molding machine does not require the application of conformal coating, the nozzle position is as follows. Figure 7 As shown, the nozzle holder 306 is on the right side and rests against the front end of the laser holder 202. When conformal coating needs to be applied, the spraying drive motor 308 rotates, driving the lead screw 311 to rotate. The rotational motion of the lead screw 311 is converted into the movement of the moving block 309 through a threaded connection. When the moving block 309 moves forward, it pushes the nozzle holder 306 and the nozzle 307 to move together through the two slide rods 310. Figure 9 As shown, when nozzle 307 moves to a position directly below and aligned with laser head 2011, the spraying drive motor 308 stops. After spraying, the spraying drive motor 308 rotates in the opposite direction, causing nozzle 307 to return to its initial position to prevent it from obstructing laser head 2011. The reason why nozzle 307 needs to move forward to a position directly below laser head 2011 and align with it during conformal coating application is that the path for applying conformal coating needs to be the same as the path for laser sintering to ensure complete coating of the circuitry.

[0037] like Figures 10 to 12 As shown, the roller pressing assembly 400 includes a pressure roller 401, a pressure roller support 402, a moving platform 403, a moving platform drive motor 404, a moving platform pulley 405, a moving platform roller 406, and a moving platform belt 407. Among them, as... Figure 13 As shown, the pressure roller 401 is a cylinder with a metal core and a flexible rubber outer layer. Pressure roller supports 402 are fixed to the horizontal frame 101 by screws, with one support on each side. A bearing 4021 is fixedly mounted at the center of the pressure roller support 402, and the two ends of the pressure roller 401 are fixed to the inner holes of the bearing 4021.

[0038] like Figure 10 and 11 As shown, the moving platform 403 is located below the pressure roller 401, and the gap between the moving platform 403 and the pressure roller 401 can be designed to be 0-0.3mm. The specific value of the gap needs to be determined according to the thickness of the polyimide film 600.

[0039] like Figure 11 and 12 As shown, two moving platform rollers 406 are provided at each of the left and right ends below the moving platform 403. The moving platform rollers 406 are engaged in the aluminum profile grooves of the horizontal frame 101, allowing the moving platform 403 to move smoothly back and forth. In addition, a moving platform drive motor 404 is installed on the bottom left side of the moving platform 403, as shown... Figure 11As shown, a mobile platform pulley 405 is fixed on the output shaft of the mobile platform drive motor 404. A mobile platform belt 407 is mounted on the mobile platform pulley 405. Both ends of the mobile platform belt 407 are fixed in the aluminum profile grooves of the horizontal frame 101. The mobile platform rollers 406 on both sides of the mobile platform pulley 405 press the mobile platform belt 407 against the mobile platform pulley 405. When the mobile platform drive motor 404 rotates, it drives the mobile platform pulley 405 to rotate, thereby causing the mobile platform 403 to move back and forth.

[0040] The working principle of this molding machine is:

[0041] Step 1: Fix the polyimide film 600 onto the moving platform 403, and move the laser head 2011 to the center of the polyimide film 600;

[0042] Step 2: Power on and start the control component 500. The control component 500 controls the crossbeam drive motor 103 and the laser bracket drive motor 203 to rotate, so that the laser head completes the first circuit pattern sintering according to the program design path requirements.

[0043] Step 3: Restart the control component 500. The control component 500 controls the crossbeam drive motor 103 and the laser bracket drive motor 203 to rotate, so that the laser head completes the second circuit pattern sintering according to the program design path requirements.

[0044] Step 4: Control component 500 controls the spray drive motor 308 to rotate, driving nozzle 307 to move and align with the laser head 2011 directly below;

[0045] Step 5: The control component 500 controls the peristaltic pump 302 to deliver the conformal coating in the storage box 301 to the nozzle 307 and spray it out. Simultaneously, it controls the crossbeam drive motor 103 and the laser bracket drive motor 203 to rotate, so that the nozzle 307 completes the first spraying along the laser sintering path.

[0046] Step Six: After letting it stand for 1-3 minutes, repeat Step Five to complete the second spraying;

[0047] Step 7: After letting it stand for 1-3 minutes, cover the circuit pattern with lead wires or conductive foil;

[0048] Step 8: Cover the circuit pattern with a flexible silicone film;

[0049] Step 9: The control component 500 controls the drive motor 404 of the moving platform to rotate, so that the moving platform 403 moves back and forth, and the pressure roller 401 rolls the polyimide film 600 and the flexible silicone film together.

[0050] The laser 201 of this molding machine uses a blue laser with a wavelength of approximately 450nm. By reasonably setting the laser parameters, stable graphene patterns can be sintered on the surface of polyimide films at low cost. The optical power range is 2.5-3.5W, the scanning rate range is 2000-2100mm / min, and the number of sintering points ranges from 10-13 dots / mm.

[0051] The graphene circuits processed by this machine can be used as flexible conductive circuits or as low-precision strain gauge sensors. When used as sensors, they can be applied in flexible wearables, such as joint rotation detection and pressure deformation detection. They can also be used as low-voltage electrically driven heating elements (24 volts) in heated wearables, such as low-voltage therapeutic heating, heated gloves, and heated scarves. This molding machine is small, lightweight, and low-cost, making it a desktop-level device. While the flexible sensors produced by this machine have lower precision and are not suitable for high-precision applications, their extremely low cost makes them suitable for scenarios where high precision is not required. Like a desktop 3D printer, this molding machine can be used in laboratories, educational settings, and homes, making it an easy-to-use DIY flexible circuit fabrication device.

[0052] The above are merely preferred embodiments of the present invention, but the scope of protection of the present invention is not limited thereto. Any equivalent substitutions or modifications made by those skilled in the art within the scope of the technology disclosed in the present invention, based on the technical solution and inventive concept of the present invention, should be covered within the scope of protection of the present invention.

Claims

1. A flexible circuit forming machine, characterized in that, include: The support assembly (100) includes a horizontal frame (101), a movable crossbeam (102), and a front and rear movement drive mechanism (103-107). The laser assembly (200) includes a laser (201), a laser bracket (202), and a left-right movement drive mechanism (203-206). The spraying assembly (300) includes a storage box (301), a peristaltic pump (302), a nozzle (307) that can be aligned with the laser path, and a synchronous spraying drive mechanism (308-311) so that the path of the spraying assembly (300) spraying conformal coating is the same as the path of laser sintering, ensuring that the circuit is completely sprayed. The roller pressing assembly (400) includes a flexible rubber roller (401) and a moving platform mechanism (403-407). Control unit (500) is used to coordinate the automated control of multiple processes, including laser sintering, conformal coating, and roll encapsulation. The flexible substrate (600) is the object of laser sintering and is used to generate laser-induced flexible conductive graphene patterns. The laser (201) is a blue laser with a wavelength of 450nm, an optical power range of 2.5-3.5W, a scanning rate range of 2000-2100mm / min, and a sintering point range of 10-13dot / mm, in order to generate a graphene conductive pattern. The flexible substrate (600) is a polyimide film.

2. The flexible circuit forming machine according to claim 1, characterized in that: The forward and backward movement drive mechanism (103-107) includes a beam drive motor (103), a beam belt (104), a beam roller (105), a transmission rod (106), and a beam pulley (107). The beam drive motor (103) is fixed to one side of the moving beam (102). The transmission rod (106) is fixedly installed on the output shaft of the beam drive motor (103). A beam pulley (107) is installed on each side of the transmission rod (106) near the two ends of the moving beam (102). The beam belt (104) is installed on the beam pulley (107). The two ends of the beam belt (104) are fixed on the horizontal frame (101). The crossbeam pulley (107) is a meshing pulley with meshing teeth, the crossbeam belt (104) is a meshing belt with meshing teeth, the crossbeam rollers (105) are disposed on both sides of the crossbeam pulley (107), and the crossbeam rollers (105) are used to press the crossbeam belt (104) onto the crossbeam pulley (107); When the beam drive motor (103) rotates, it drives the transmission rod (106) to drive the beam pulleys (107) on both sides to rotate synchronously. The beam pulleys (107) move along the beam belt (104), thereby driving the moving beam (102) to move along the beam belt (104), thereby achieving the purpose of driving the laser component (200) to move back and forth.

3. The flexible circuit forming machine according to claim 1, characterized in that: The left and right movement drive mechanism (203-206) includes a laser bracket drive motor (203), a laser bracket pulley (204), a laser bracket roller (205), and a laser bracket belt (206). The laser (201) and the laser bracket drive motor (203) are respectively fixed on the front and rear sides of the laser bracket (202). The laser bracket pulley (204) is installed on the output shaft of the laser bracket drive motor (203). A laser bracket roller (205) is installed on each side of the laser bracket pulley (204). When the laser bracket drive motor (203) rotates, it drives the laser bracket pulley (204) to rotate, thereby driving the laser component (200) to move along the laser bracket belt (206) to achieve the purpose of driving the laser component (200) to move left and right.

4. The flexible circuit forming machine according to claim 1, characterized in that: The spraying assembly (300) also includes a spraying bracket (303), an inlet pipe (304), an outlet pipe (305), and a nozzle bracket (306). The synchronous spraying drive mechanism (308-311) includes a spraying drive motor (308), a moving block (309), a slide bar (310), and a lead screw (311). The storage box (301) contains a special conformal coating for circuit boards. The storage box (301) and the peristaltic pump (302) are both fixedly mounted on the spraying bracket (303). The spraying bracket (303) is fixed on the moving crossbeam (102). The inlet pipe (304) of the peristaltic pump (302) is embedded in the storage box (301). The outlet pipe (305) of the peristaltic pump (302) is connected to the nozzle bracket (306). The nozzle bracket (306) has a through channel (3601) inside. The conformal coating is delivered to the nozzle (307) through the channel (3601). The nozzle bracket (306) is fixedly connected to the moving block (309) via two slide rods (310). The two slide rods (310) pass through the front end of the laser bracket (202). The moving block (309) has a threaded hole in the middle. The lead screw (311) passes through the threaded hole of the moving block (309). One end of the lead screw (311) is fixed to the front end of the laser bracket (202), and the other end is fixedly connected to the output shaft of the spraying drive motor (308). When the spraying drive motor (308) rotates, it can drive the nozzle bracket (306) to move the nozzle (307) back and forth.

5. The flexible circuit forming machine according to claim 1, characterized in that: The roller pressing assembly (400) also includes a roller support (402), and the moving platform mechanism (403-407) includes a moving platform (403), a moving platform drive motor (404), a moving platform pulley (405), a moving platform roller (406), and a moving platform belt (407). There is one pressure roller bracket (402) on each side and it is fixed on the horizontal frame (101). A bearing (4021) is installed at the center of the pressure roller bracket (402), and the two ends of the pressure roller (401) are fixed on the inner hole of the bearing (4021). The movable platform (403) is disposed below the pressure roller (401), and the gap between the movable platform (403) and the pressure roller (401) is 0-0.3mm. The mobile platform (403) is provided with four mobile platform rollers (406) at its left and right ends. The mobile platform rollers (406) are engaged in the grooves of the horizontal frame (101) and enable the mobile platform (403) to move smoothly back and forth. The mobile platform drive motor (404) is installed on one side of the bottom of the mobile platform (403). The mobile platform pulley (405) is fixed on the output shaft of the mobile platform drive motor (404). The mobile platform belt (407) is installed on the mobile platform pulley (405). The two ends of the mobile platform belt (407) are fixed on the horizontal frame (101). The mobile platform roller (406) presses the mobile platform belt (407) tightly on the mobile platform pulley (405). When the mobile platform drive motor (404) rotates, it drives the mobile platform pulley (405) to rotate, thereby causing the mobile platform (403) to move back and forth.

6. The flexible circuit forming machine according to any one of claims 1-5, characterized in that: The pressure roller (401) is a composite structure consisting of a metal core layer and a rubber outer layer with a Shore hardness of 65±5.

7. A method for fabricating a flexible circuit, characterized in that, Using the molding machine according to any one of claims 1-6, the steps include: Step 1: Two laser sintering processes are used to form a graphene conductive pattern; Step 2: Apply two coats of conformal coating and allow them to cure. Step 3: Laying the conductive lead-out layer; Step 4: Flexible silicone film roll forming encapsulation.

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