Conductive metal grid film flexible circuit board composite board, equipment and alarm method
By using conductive metal mesh thin film flexible circuit board clad plate in the equipment, combined with the design of fragile lines, the problem that existing equipment cannot prevent physical disassembly and hacker modification is solved, and multiple security protection of the equipment is achieved.
Patent Information
- Application Number
- CN202411789095.X
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2024-12-06
- Publication Date
- 2025-03-11
AI Technical Summary
Existing equipment cannot effectively prevent physical disassembly and hacker modifications, resulting in the leakage of security information and the risk of personal injury.
The flexible circuit board clad is adopted for conductive metal mesh thin film, including flexible circuit boards and fragile circuits. The fragile circuits can tear and disconnect the circuit under the action of external forces, and trigger an alarm.
Effectively prevent physical disassembly and illegal modification of the equipment, ensure that the equipment can trigger alarms when faced with soft spy and physical disassembly, lock the equipment, and improve user safety.
Smart Images
Figure CN119603856A_ABST
Abstract
Description
Technical Field
[0001] The present invention relates to the field of electronics, and in particular to a conductive metal grid film flexible circuit board laminate, equipment and an alarm method. Background Art
[0002] At present, the financial communications industry has been facing the problem of hackers stealing security information. Major POS manufacturers are taking security protection measures for such bad behavior. Intercoms in the Middle East were maliciously modified and explosive devices were installed, resulting in a large number of casualties. At the same time, the mobile phone industry is facing such security risks.
[0003] At present, the only anti-hacker soft-peeping protection from the security protection mechanism of the financial communication industry is far from enough. The existing anti-hacker soft-peeping protection is to set two signal lines in the POS machine security signal line system. When the hacker uses the prying scheme to steal the user's card swiping information, the POS machine starts the protection command to make the POS machine system lock the alarm. After the alarm is locked, it must be returned to the original factory for repair before it can be used again to protect the safety of the POS machine. However, this protection principle still has shortcomings: when the hacker physically disassembles the POS machine and re-implants the theft line avoiding the two signal lines, this protection method will become invalid. At the same time, hackers can also modify and implant explosive devices in the POS machine to make the user's personal safety unprotected.
[0004] Currently, mobile phones and walkie-talkies on the market do not have protection measures to prevent third-party hackers from dismantling the devices and installing explosive devices, which greatly threatens the personal safety of humans when using mobile phones and walkie-talkies.
[0005] In summary, existing communication devices such as mobile phones and walkie-talkies, and existing financial payment devices such as POS machines, all need to improve their protection levels to ensure that the devices have both the existing anti-hacker soft prying function and the function of preventing illegal disassembly and assembly.
[0006] In view of this, it is necessary to provide a conductive metal grid film flexible circuit board laminate, equipment and alarm method. Summary of the invention
[0007] The present invention provides a conductive metal grid film flexible circuit board laminate, equipment and alarm method, which effectively solves the problem that the existing equipment cannot prevent physical disassembly.
[0008] The technical solution adopted by the present invention is:
[0009] A conductive metal grid film flexible circuit board laminate comprises a flexible circuit board and a fragile circuit. The flexible circuit board and the fragile circuit are bonded and connected. The two ends of the fragile circuit are part one and part two respectively. Part one is arranged on the flexible circuit board, and part two is exposed on the outside of the flexible circuit board. One side of part two is provided with adhesive.
[0010] Furthermore, the adhesive backing is arranged on the front side of the second part, and a release film is arranged on the front side of the second part.
[0011] Furthermore, the fragile circuit includes a front silver paste circuit, a back silver paste circuit, a connecting circuit and a non-conductive substrate layer, the non-conductive substrate layer is provided with a through hole, the front silver paste circuit is printed on the front of the non-conductive substrate layer, the back silver paste circuit is printed on the back of the non-conductive substrate layer, the connecting circuit is provided in the through hole, and the two ends thereof are respectively connected to the front silver paste circuit and the back silver paste circuit, the front silver paste circuit and the back silver paste circuit are connected to the flexible circuit board. The non-conductive substrate layer is a PET layer.
[0012] Furthermore, the fragile circuit also includes a front non-conductive coating arranged on the front side of the non-conductive substrate layer and a back non-conductive coating arranged on the back side of the non-conductive substrate layer, the front silver paste circuit is located between the front non-conductive coating layer and the non-conductive substrate layer, and the back silver paste circuit is located between the back non-conductive coating layer and the non-conductive substrate layer.
[0013] Furthermore, the second part is used to be attached to the back of the display screen of the device to be protected, and the second part can cause the fragile circuit to tear under the action of external force, so that the fragile circuit loses the transmission line.
[0014] Furthermore, the thickness of the fragile circuit is 5um to 7um.
[0015] Furthermore, the flexible circuit board is an FPC circuit board. The FPC circuit includes a substrate and five layers of conductors arranged on the substrate.
[0016] A device includes a rear shell, a power supply unit, a display screen, and a protection circuit arranged on the rear shell, wherein the protection circuit is connected to a flexible circuit board, the display screen and the power supply unit are installed on the rear shell, the power supply unit supplies power to the display screen, and the protection circuit forms a loop with a conductive metal grid film flexible circuit board laminate.
[0017] Furthermore, a dielectric layer is disposed on the back of the display screen, the area of the dielectric layer is larger than the area of the second part, and the second part is completely disposed on the dielectric layer.
[0018] An alarm method is used to protect equipment. When the protected equipment is faced with soft spying and information theft, the power grid wall formed by the protection line will alarm; when the equipment is disassembled from the display screen side, pulling the display screen will cause the fragile line to be torn and the circuit to be disconnected, thereby triggering an alarm, causing the equipment to be locked and unable to use functions; when the equipment is disassembled from the back shell side, the connection between the protection line and the flexible circuit board will be disconnected and the circuit will be disconnected, thereby triggering an alarm, causing the equipment to be locked and unable to use functions; once the equipment alarms and the equipment is locked, it must be returned to the original factory for decryption and system recovery before it can be used again.
[0019] Beneficial effects of the invention:
[0020] 1. On the basis of the existing financial communication information relying on a single flexible circuit board to prevent hacker soft prying and stealing, a fragile line that is easy to tear is added. The fragile line is easy to break to ensure that the protection line short circuit triggers an alarm when the equipment is dismantled, and prevents the solution of avoiding two signal lines and re-implanting the stolen line after the equipment is physically disassembled. At the same time, it fills the technical gap of hackers modifying equipment to add explosive devices.
[0021] 2. It fills the gap in anti-hacker modification technology in the mobile communication and walkie-talkie industries, making users safer when using mobile phones and walkie-talkies.
[0022] 3. Change the existing 7-layer board structure of the flexible anti-tampering circuit to a 5-layer board structure plus a fragile circuit structure. The fragile circuit has double-sided silver paste on the front side and the back side, which can save 30% of the cost.
[0023] 4. By providing a release film on the adhesive backing surface of the fragile circuit, it can be ensured that the fragile circuit has good adhesion before use. BRIEF DESCRIPTION OF THE DRAWINGS
[0024] Figure 1 An overall schematic diagram of the conductive metal mesh film flexible circuit board laminate provided in an embodiment of the present application.
[0025] Figure 2 This is a functional schematic diagram of the conductive metal mesh film flexible circuit board laminate provided in an embodiment of the present application when in use.
[0026] The markings in the figure are: 1, flexible circuit board; 2, fragile circuit; 3, release film; 21, part No. 1; 22, part No. 2; 101, conductive contact. DETAILED DESCRIPTION
[0027] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, the specific embodiments of the present invention are described in detail below with reference to the accompanying drawings.
[0028] like Figure 1 As shown, the first embodiment provided by the present application is a conductive metal mesh film flexible circuit board 1 laminate, including a flexible circuit board 1 and a fragile circuit 2, wherein the flexible circuit board 1 and the fragile circuit 2 are bonded and conductive, and the two ends of the fragile circuit 2 are respectively a No. 1 portion 21 and a No. 2 portion 22, wherein the No. 1 portion 21 is arranged on the flexible circuit board 1, and the No. 2 portion 22 is exposed on the outside of the flexible circuit board 1, and one side of the No. 2 portion 22 is provided with a backing adhesive.
[0029] It should be noted that the flexible circuit board 1 is an existing structure, such as Figure 1 As shown, the conductive contact sheet 101 on the back side of the flexible circuit board 1 is used for conducting with the outside.
[0030] like Figure 2 As shown, in actual use, the second part 22 is connected to the back of the display screen of the device to be protected through the adhesive, and is connected to the protection circuit of the device to be protected through the flexible circuit board 1. The flexible circuit board 1, the fragile circuit and the device back shell protection circuit together form a loop. When the protected device is facing soft prying and stealing information, the protection circuit can alarm and lock the device like the existing technology and make it impossible to use functions. When the protected device is facing physical disassembly, if it is disassembled from the display screen side, then Figure 2 The tear-proof function at point b in the figure is activated. During the disassembly process, since the fragile circuit is bonded to the back of the display screen, pulling the display screen will cause the fragile circuit 2 to be torn, resulting in a disconnected circuit, which will trigger an alarm and cause the device to be locked and unable to use functions. If the device is disassembled from the back shell side, the connection between the protection circuit and the flexible circuit board 1 at point a will be disconnected, resulting in a disconnected circuit, which will trigger an alarm and cause the device to be locked and unable to use functions. Once the device alarms and the device is locked, it must be returned to the original factory for decryption and system recovery before it can be used again.
[0031] The above design can protect the security of financial equipment communication information and prevent hackers from soft spying. It can prevent physical disassembly of the protected equipment and prevent illegal modification of mobile phone communications and walkie-talkie industries, thereby improving the safety performance of users.
[0032] Specifically: Figure 2 As shown, the adhesive backing is arranged on the front of the second portion 22 , and a release film 3 is arranged on the front of the second portion 22 .
[0033] In actual use, the back side of the flexible circuit board 1 is connected to the protective circuit in the rear shell of the device to be protected, and the release film 3 is attached to the front side of the second part 22. When it is necessary to assemble the conductive metal mesh film flexible circuit board 1 laminate of the present application on the device to be protected, first tear off the release film 3 from the second part 22, and then attach the second part 22 to the protected device.
[0034] In the above design, by setting a release film 3 on the front of the second part 22, the conductive metal mesh film flexible circuit board 1 laminate of the present application can be protected during transportation. The second part 22 is in a pollution-free state under the protection of the release film 3, effectively ensuring the adhesion of the back glue.
[0035] Specifically: the fragile circuit 2 includes a front silver paste circuit, a back silver paste circuit, a connecting circuit and a non-conductive substrate layer, the non-conductive substrate layer is provided with a through hole, the front silver paste circuit is printed on the front side of the non-conductive substrate layer, the back silver paste circuit is printed on the back side of the non-conductive substrate layer, and the connecting circuit is arranged in the through hole, and the two ends thereof are respectively connected to the front silver paste circuit and the back silver paste circuit.
[0036] In actual use, the front silver paste circuit, the back silver paste circuit and the connecting circuit are supported by the non-conductive substrate layer. The front silver paste circuit, the connecting circuit and the back silver paste circuit together form a silver paste wire, which is connected to the flexible circuit board 1. After the flexible circuit board 1 is connected to the protection circuit in the rear shell of the device to be protected, the protection circuit and the silver paste wire form a loop with the flexible circuit board 1.
[0037] In the above design, the structural design of the silver paste circuit and the specific implementation method are convenient for saving space.
[0038] Specifically, the second portion 22 is used to be attached to the back of the display screen of the device to be protected. The second portion 22 can cause the fragile circuit 2 to tear under the action of external force, so that the fragile circuit 2 loses the transmission line.
[0039] In the above design, the second portion 22 is easy to tear and can quickly cause circuit breaking protection of the fragile circuit 2 .
[0040] Specifically: the fragile circuit 2 also includes a front non-conductive coating arranged on the front side of the non-conductive substrate layer and a back non-conductive coating arranged on the back side of the non-conductive substrate layer, the front silver paste circuit is located between the front non-conductive coating layer and the non-conductive substrate layer, and the back silver paste circuit is located between the back non-conductive coating layer and the non-conductive substrate layer.
[0041] In actual use, the front non-conductive film or the back non-conductive film corresponding to the second portion 22 is bonded to the back of the display screen of the device to be protected through the adhesive.
[0042] The above design can effectively prevent the silver paste wire from short-circuiting after the fragile circuit 2 is installed.
[0043] Specifically: the non-conductive substrate layer is a PET layer.
[0044] In the above design, PET has good insulation and can effectively carry the front silver paste circuit, the back silver paste circuit and the connecting circuit. At the same time, PET has good film-forming properties and can be torn when subjected to external force at a certain thickness.
[0045] Specifically, the thickness of the fragile circuit 2 is 5um to 7um.
[0046] In the above design, when the thickness of the fragile circuit 2 is 5um to 7um, it can not only meet the normal conductive performance, but also ensure the thinness of the product, so that the silver paste circuit can be torn when subjected to external force.
[0047] Specifically: the flexible circuit board 1 is an FPC circuit.
[0048] Specifically: the FPC circuit includes a substrate and five layers of conductors arranged on the substrate.
[0049] In the above design, space can be saved by setting the FPC line as a five-layer conductor.
[0050] The second embodiment provided by the present application is a conductive metal mesh film flexible circuit board 1 laminate, including a flexible circuit board 1 and a fragile circuit 2, wherein the flexible circuit board 1 is bonded and connected to the fragile circuit 2, and the two ends of the fragile circuit 2 are respectively a first part 21 and a second part 22, wherein the first part 21 is arranged on the flexible circuit board 1, and the second part 22 is exposed on the outside of the flexible circuit board 1, and one side of the second part 22 is provided with a back glue. The back glue is arranged on the front of the second part 22, and a release film 3 is arranged on the front of the second part 22. The fragile circuit 2 includes a front silver paste circuit, a back silver paste circuit, a connecting circuit and a non-conductive substrate layer, wherein the non-conductive substrate layer is provided with a through hole, wherein the front silver paste circuit is printed on the front of the non-conductive substrate layer, and the back silver paste circuit is printed on the back of the non-conductive substrate layer, and the connecting circuit is arranged in the through hole and the two ends are respectively connected to the front silver paste circuit and the back silver paste circuit. The fragile circuit 2 also includes a front non-conductive coating arranged on the front of the non-conductive substrate layer and a back non-conductive coating arranged on the back of the non-conductive substrate layer. The front silver paste circuit is located between the front non-conductive coating layer and the non-conductive substrate layer, and the back silver paste circuit is located between the back non-conductive coating layer and the non-conductive substrate layer. The non-conductive substrate layer is a PET layer. The thickness of the fragile circuit 2 is 5um to 7um. The flexible circuit board 1 is an FPC circuit board. The FPC circuit includes a substrate and five layers of conductors arranged on the substrate.
[0051] In actual use, first tear off the release mold, and attach the front of the second part 22 to the back of the display screen of the device to be protected, and connect the flexible circuit board 1 to the protection circuit on the back shell of the device to be protected. When hackers use soft probing to spy on the protection circuit of the back shell or the flexible circuit board 1, they can be protected by the protection net formed after the protection circuit and the flexible circuit board 1 are connected. When the device is physically disassembled, if you try to disassemble it from the back shell, it will cause the conductive contact 101 of the flexible circuit board 1 to be disconnected from the pin of the protection circuit, thereby triggering an alarm. If you try to disassemble it from the display screen, the fragile circuit 2 will be torn when the display screen is pulled, causing the circuit to be disconnected and triggering an alarm.
[0052] The above design can play multiple protective roles for the protected equipment, including preventing soft spying by hackers, preventing illegal disassembly and modification of the equipment, and protecting the information security of the equipment, the personal safety and property safety of the equipment users.
[0053] like Figure 2 As shown, the third embodiment provided by the present application is a device, including a back shell, a power supply unit, a display screen, and a protection circuit arranged on the back shell, wherein the protection circuit is connected to the flexible circuit board 1, the display screen and the power supply unit are installed on the back shell, the power supply unit supplies power to the display screen, and the protection circuit forms a loop with the conductive metal mesh film flexible circuit board 1 laminate.
[0054] In actual use, when the device is illegally disassembled, if the disassembly starts from the rear shell, the protection circuit and the flexible circuit board 1 will be disconnected, thereby triggering an alarm. If the disassembly starts from the display side, when the display is pulled, the second part 22 bonded to the back of the display will be torn, thereby disconnecting the circuit and triggering an alarm.
[0055] In the above design, the device can be effectively protected, preventing both soft intrusion by hackers and physical disassembly and modification.
[0056] Specifically, a dielectric layer is further disposed on the back of the display screen, the area of the dielectric layer is larger than the area of the second portion 22, and the second portion 22 is completely disposed on the dielectric layer.
[0057] In the above design, the area of the dielectric layer is larger than the area of the second portion 22 , which can provide a sufficient area for bonding the second portion 22 .
[0058] The fourth embodiment provided by the present application is an alarm method for protecting a device. When the protected device faces soft spying and information theft, the power grid wall formed by the protection line will alarm; when the device is disassembled from the display screen side, pulling the display screen will cause the fragile line 2 to be torn, resulting in the circuit being disconnected, thereby triggering an alarm, causing the device to be locked and unable to use functions; when the device is disassembled from the back shell side, the connection between the protection line and the flexible circuit board 1 will be disconnected, resulting in the circuit being disconnected, thereby triggering an alarm, causing the device to be locked and unable to use functions; once the device alarms and the device is locked, it must be returned to the original factory for decryption and system recovery before it can be used again.
[0059] To further explain in detail, it should be understood that the above is only a specific embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.
Claims
1. Conductive metal grid film flexible circuit board laminate, characterized by: The invention comprises a flexible circuit board (1) and a fragile circuit (2), wherein the flexible circuit board (1) and the fragile circuit (2) are bonded and connected, and the two ends of the fragile circuit (2) are respectively a first part (21) and a second part (22), wherein the first part (21) is arranged on the flexible circuit board (1), and the second part (22) is exposed on the outside of the flexible circuit board (1), and one side of the second part (22) is provided with a backing adhesive.
2. The conductive metal mesh film flexible circuit board laminate according to claim 1, characterized in that: The adhesive backing is arranged on the front side of the No. 2 portion (22), and a release film (3) is arranged on the front side of the No. 2 portion (22).
3. The conductive metal mesh film flexible circuit board laminate according to claim 1, characterized in that: The fragile circuit (2) comprises a front silver paste circuit, a back silver paste circuit, a connecting circuit and a non-conductive substrate layer, wherein the non-conductive substrate layer is provided with a through hole, the front silver paste circuit is printed on the front side of the non-conductive substrate layer, the back silver paste circuit is printed on the back side of the non-conductive substrate layer, and the connecting circuit is arranged in the through hole, and the two ends thereof are respectively connected to the front silver paste circuit and the back silver paste circuit; and the non-conductive substrate layer is a PET layer.
4. The conductive metal mesh film flexible circuit board laminate according to claim 3, characterized in that: The fragile circuit (2) also includes a front non-conductive coating arranged on the front side of the non-conductive substrate layer and a back non-conductive coating arranged on the back side of the non-conductive substrate layer, the front silver paste circuit is located between the front non-conductive coating layer and the non-conductive substrate layer, and the back silver paste circuit is located between the back non-conductive coating layer and the non-conductive substrate layer.
5. The conductive metal mesh film flexible circuit board laminate according to claim 3, characterized in that: The second part (22) is used to be attached to the back of the display screen of the device to be protected. The second part (22) can cause the fragile circuit (2) to tear under the action of external force, so that the fragile circuit (2) loses the transmission line.
6. The conductive metal mesh film flexible circuit board laminate according to claim 1, characterized in that: The thickness of the fragile circuit (2) is 5um to 7um.
7. The conductive metal mesh film flexible circuit board laminate according to claim 1, characterized in that: The flexible circuit board (1) is an FPC circuit board; the FPC circuit comprises a substrate and five layers of conductors arranged on the substrate.
8. A device, characterized in that: It comprises a rear shell, a power supply unit, a display screen, and a protection circuit arranged on the rear shell, wherein the protection circuit is connected to a flexible circuit board (1), the display screen and the power supply unit are mounted on the rear shell, the power supply unit supplies power to the display screen, and the protection circuit forms a loop with a conductive metal mesh film flexible circuit board laminate.
9. The device according to claim 8, characterized in that: A dielectric layer is also arranged on the back of the display screen, the area of the dielectric layer is larger than the area of the second portion (22), and the second portion (22) is completely arranged on the dielectric layer.
10. An alarm method for protecting the device according to any one of claims 8 to 9, characterized in that: When the protected device is faced with soft spying and information theft, the electric grid wall formed by the protection circuit will sound an alarm; when the device is disassembled from the display screen side, pulling the display screen will cause the fragile circuit (2) to be torn, resulting in a disconnected circuit, thereby triggering an alarm, causing the device to be locked and unable to use functions; when the device is disassembled from the back shell side, the connection between the protection circuit and the flexible circuit board (1) will be disconnected, resulting in a disconnected circuit, thereby triggering an alarm, causing the device to be locked and unable to use functions; once the device alarms and the device is locked, it must be returned to the original factory for decryption and system recovery before it can be used again.