Fingerprint chip testing method and fingerprint chip testing system

Abstract

This application provides a fingerprint chip testing method and a fingerprint chip testing system. The testing method includes: using a test head to attract a fingerprint chip and placing the fingerprint chip onto a test socket on a load board, establishing a communication connection between the fingerprint chip and the load board; running a test program, and when the test program executes to the simulated finger pressure test, sending a pressure test command to a pneumatic controller using the load board; using the pneumatic controller to control the finger pressure head to extend according to the pressure test command, so that the finger pressure head contacts the fingerprint sensing area of ​​the fingerprint chip; performing a simulated finger pressure test on the fingerprint chip; after the simulated finger pressure test is completed, sending a test end command to the pneumatic controller using the load board; and using the pneumatic controller to control the finger pressure head to retract to its original position according to the test end command. This application, through automated placement, precise pneumatic finger pressure testing, and integrated control of the testing process, forms a testing method adapted to individual finished fingerprint chips, improving the reliability and integrity of fingerprint chip testing.

Description

Technical Field

[0001] This application relates to the field of fingerprint chip testing technology, and in particular to a fingerprint chip testing method and a fingerprint chip testing system. Background Technology

[0002] Fingerprint chips are the core components for fingerprint acquisition, recognition, and authentication. They typically integrate sensor arrays, signal processing, analog-to-digital conversion, and interface circuits. They can convert the differences in the ridges of the finger's epidermis into electrical signals, which are then processed by algorithms to extract and compare features. They are widely used in devices that require identity verification, such as mobile phones, tablets, laptops, door locks, vehicle in-vehicle systems, and payment terminals.

[0003] Currently, fingerprint chip testing involves either die testing or strip testing. There is no strategy for testing individual fingerprint chips at the finished product stage. Summary of the Invention

[0004] In view of this, the purpose of this application is to propose a fingerprint chip testing method to solve the above-mentioned technical problems.

[0005] To achieve the above objectives, this application provides a fingerprint chip testing method, comprising:

[0006] A fingerprint chip is adsorbed using a test head and placed onto a test socket on a load board, thereby establishing a communication connection between the fingerprint chip and the load board. The test head includes a mounting base and a finger pressure head, which is retractably mounted on the mounting base. When the test program is executed to the simulated finger pressure test, the load board sends a pressure test command to the air pressure controller. The air pressure controller is used to control the extension of the finger pressure head according to the pressure test command, so that the finger pressure head contacts the fingerprint sensing area of ​​the fingerprint chip; The fingerprint chip was subjected to a simulated finger pressure test; After the simulated finger pressure test is completed, the load board sends a test end command to the air pressure controller; The pressure controller is used to retract the finger pressure head back to its original position according to the test end command.

[0007] Optionally, the step of using a test head to adsorb the fingerprint chip and placing the fingerprint chip onto the test socket of the load board to establish a communication connection between the fingerprint chip and the load board includes the following prior steps: Place the fingerprint chip in the loading area of ​​the machine; The fingerprint chip is picked up from the loading area and transferred to the first conveying mechanism using a loading arm; The fingerprint chip is transported to the testing area using the first transport mechanism; The step of using a test head to adsorb the fingerprint chip and placing the fingerprint chip onto the test socket of the load board to establish a communication connection between the fingerprint chip and the load board includes: The fingerprint chip in the test area is adsorbed by the test head and then transferred to the load board.

[0008] Optionally, the step of placing the fingerprint chip in the loading area of ​​the machine includes: The fingerprint chip is picked up and placed in the temperature-controlled area using the loading arm. The fingerprint chip is preheated or precooled using the temperature control zone; The fingerprint chip is picked up from the temperature-controlled area and transferred to the first conveying mechanism using the loading arm.

[0009] Optionally, the step of using the air pressure controller to control the finger pressure head to retract to its original position according to the test end command includes: The fingerprint chip on the load plate is adsorbed by the test head and then transferred to the second transport mechanism; The fingerprint chip is transported to the unloading area using the second conveying mechanism.

[0010] Optionally, the step of using the second conveying mechanism to convey the fingerprint chip to the unloading area includes: The fingerprint chips in the unloading area are sorted and unloaded according to the test results using an unloading arm.

[0011] Optionally, the step of using a test head to adsorb the fingerprint chip and placing the fingerprint chip onto the test socket of the load board to establish a communication connection between the fingerprint chip and the load board includes: The test head is used to attract the non-fingerprint sensing area of ​​the fingerprint chip and move the fingerprint chip above the test base; The test head is controlled to press down on the non-fingerprint sensing area, so that the fingerprint chip comes into contact with the test socket and establishes a communication connection; Control the test head to maintain or remove the adsorption force on the non-fingerprint sensing area.

[0012] Optionally, the step of using the air pressure controller to control the extension of the finger pressure head according to the pressure test command, so that the finger pressure head contacts the fingerprint sensing area of ​​the fingerprint chip, includes: The air pressure controller provides air pressure to the positive pressure air channel of the test head to control the extension of the finger pressure head, so that the end face of the finger pressure head pressing against the fingerprint sensing area is flush with the end face of the test head pressing against the non-fingerprint sensing area; wherein, the air pressure controller is connected to the finger pressure head through the positive pressure air channel.

[0013] Based on the same inventive concept, this application also provides a fingerprint chip testing system, which includes: The machine is provided with a loading area, a first conveying mechanism and a testing area in sequence. The loading area includes a loading platform and a loading arm. The loading arm is used to pick up the fingerprint chip from the loading platform and transfer it to the first conveying mechanism. The first conveying mechanism is used to transport the fingerprint chip to the testing area. A fingerprint chip testing device is disposed in the testing area, and the fingerprint chip testing device includes: A load board includes a test socket for placing a fingerprint chip, the load board being configured to send a pressure test command when the test program executes to a simulated finger pressure test, and the load board being further configured to send a test end command after the simulated finger pressure test is completed; The test head is used to adsorb the fingerprint chip and move the fingerprint chip onto the test base, so that the fingerprint chip establishes a communication connection with the load board; the test head includes a mounting base and a finger pressure head, the finger pressure head is retractably mounted on the mounting base, and the finger pressure head is used to contact the fingerprint sensing area of ​​the fingerprint chip during simulated finger pressure testing; A pneumatic controller is provided, which is used to control the finger pressure head to extend and contact the fingerprint sensing area after receiving the pressure test command. The pneumatic controller is also used to control the finger pressure head to retract to its original position after receiving the test end command.

[0014] Optionally, the machine tool further includes: A temperature control zone is located between the feeding zone and the first conveying mechanism, and is used to preheat or precool the fingerprint chip.

[0015] Optionally, the machine also includes a second conveying mechanism and a feeding area; the test head is further used to adsorb the fingerprint chip on the load plate after the finger pressure head retracts to its original position, and to transfer the fingerprint chip to the second conveying mechanism, which is used to transport the fingerprint chip to the feeding area; the feeding area includes a feeding platform and a feeding arm, which is used to grab the fingerprint chip from the second conveying mechanism and transfer it to the feeding area.

[0016] This application provides a fingerprint chip testing method, comprising: using a test head to adsorb a fingerprint chip and placing the fingerprint chip onto a test socket on a load board, establishing a communication connection between the fingerprint chip and the load board; during the testing process, running a test program, and when the test program executes to the simulated finger pressure test, sending a pressure test command to a pneumatic controller using the load board; using the pneumatic controller to control the finger pressure head of the test head to extend according to the pressure test command, so that the finger pressure head contacts the fingerprint sensing area of ​​the fingerprint chip; performing a simulated finger pressure test on the fingerprint chip; after the simulated finger pressure test is completed, sending a test end command to the pneumatic controller using the load board; and using the pneumatic controller to control the finger pressure head to retract to its original position according to the test end command. This application, through automated placement, precise pneumatic finger pressure, and integrated control of the testing process, forms an efficient and reliable testing method adapted to finished single fingerprint chips, which can improve the reliability and integrity of fingerprint chip testing. Attached Figure Description

[0017] To more clearly illustrate the technical solutions in this application or related technologies, the drawings used in the description of the embodiments or related technologies will be briefly introduced below. Obviously, the drawings described below are only embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0018] Figure 1 This is a schematic flowchart of a fingerprint chip testing method according to an embodiment of this application; Figure 2 This is a schematic structural diagram of a fingerprint chip testing apparatus according to an embodiment of this application; Figure 3 This is a schematic structural diagram of a fingerprint chip testing system according to an embodiment of this application.

[0019] Marker explanation: 100. Fingerprint chip testing device; 10. Load board; 11. Test socket; 20. Test head; 21. Mounting base; 211. Positive pressure airway; 212. Negative pressure airway; 22. Finger pressure head; 23. Cover structure; 231. Nozzle; 1. Fingerprint chip testing system; 210. Loading area; 220. First conveying mechanism; 230. Testing area; 240. Second conveying mechanism; 250. Unloading area. Detailed Implementation

[0020] To make the objectives, technical solutions, and advantages of this application clearer, the following detailed description is provided in conjunction with specific embodiments and the accompanying drawings.

[0021] It should be noted that, unless otherwise defined, the technical or scientific terms used in the embodiments of this application should have the ordinary meaning understood by one of ordinary skill in the art to which this application pertains. The terms "first," "second," and similar terms used in the embodiments of this application do not indicate any order, quantity, or importance, but are merely used to distinguish different components. Terms such as "comprising" or "including" mean that the element or object preceding the word encompasses the elements or objects listed following the word and their equivalents, without excluding other elements or objects. Terms such as "connected" or "linked" are not limited to physical or mechanical connections, but can include electrical connections, whether direct or indirect. Terms such as "above" and "inside" are only used to indicate relative positional relationships; when the absolute position of the described object changes, the relative positional relationship may also change accordingly.

[0022] like Figure 1 As shown in the figure, this application provides a fingerprint chip testing method, which includes: In step S100, the fingerprint chip is adsorbed by the test head 20 and placed on the test seat 11 of the load board 10, so that the fingerprint chip and the load board 10 establish a communication connection; wherein, the test head 20 includes a mounting base 21 and a finger pressure head 22, and the finger pressure head 22 is retractably mounted on the mounting base 21. Step S200: Run the test program. When the test program reaches the simulated finger pressure test, use the load board 10 to send a pressure test command to the air pressure controller. In step S300, the air pressure controller is used to control the finger pressure head 22 to extend according to the pressure test command, so that the finger pressure head 22 contacts the fingerprint sensing area of ​​the fingerprint chip. Step S400: Perform a simulated finger pressure test on the fingerprint chip; Step S500: After the simulated finger pressure test is completed, the load board 10 sends a test end command to the air pressure controller. In step S600, the pressure controller is used to retract the finger pressure head 22 back to its original position according to the test end command.

[0023] This application embodiment forms an efficient and reliable testing method adapted to a single finished fingerprint chip by using automated placement, pneumatic precise finger pressure, and integrated control of the testing process, which can improve the reliability and integrity of fingerprint chip testing.

[0024] In step S100, the adsorption structure of the test head 20 stably picks up a single finished fingerprint chip, then precisely transfers and mounts the fingerprint chip onto the load board 10, enabling electrical connection between the fingerprint chip's interface circuit and the load board 10, establishing a communication link for test commands and data, thereby completing the physical positioning and electrical connection between the fingerprint chip and the load board 10. The adsorption and placement method of the test head 20 allows for non-destructive picking and precise positioning of the finished single fingerprint chip, avoiding damage to the fingerprint chip's appearance and fingerprint sensing area caused by the clamping structure, while also ensuring the positional accuracy of electrical connection and finger pressure contact during simulated finger pressure testing.

[0025] In step S200, the test system runs a preset test program. After completing routine tests such as basic electrical and interface communication, when the test process reaches the simulated finger pressure test stage, the load board 10 sends a pressure test command to the air pressure controller to trigger the simulated finger pressure action process.

[0026] The load plate 10 is linked with the air pressure controller, which can realize the synchronous execution of the test program and mechanical action. The simulated finger pressure test is automatically triggered by the load plate 10 and the test head 20 is automatically pressed, without manual intervention, which effectively improves test efficiency and consistency.

[0027] In step S300, after receiving the pressure test command, the air pressure controller adjusts the air pressure output to drive the finger pressure head 22 on the test head 20 to extend precisely, so that the finger pressure head 22 makes stable contact with the fingerprint sensing area of ​​the fingerprint chip with controllable pressure, simulating the real state of a human finger pressing on the fingerprint sensing area, which helps to improve the stability and reliability of fingerprint chip testing.

[0028] The retractable finger pressure head 22, combined with air pressure drive, can stably and controllably simulate the real finger pressing state, ensuring the reliability of finger pressure test, while avoiding damage to the fingerprint chip due to excessive pressure, making the test results closer to the actual use scenario. At the same time, the test action has fast response and high stability, making it suitable for batch automated testing.

[0029] In step S400, under the premise that the finger pressure head 22 is in reliable contact with the fingerprint sensing area, the load board 10 applies an excitation signal to the fingerprint chip. The sensing array, signal processing, and analog-to-digital conversion circuit inside the fingerprint chip work together to convert the physical contact of simulated finger pressure into an electrical signal and complete algorithm processing such as feature extraction and comparison. The load board 10 synchronously collects the chip output signal to verify whether its fingerprint acquisition, recognition, and identity authentication functions are normal.

[0030] In step S500, after the simulated finger pressure test is completed, the load board 10 sends a test end command to the air pressure controller, triggering the finger pressure retraction process. The load board 10 and the air pressure controller are linked for control, which can realize the synchronous execution of the test program and mechanical action. The test ends automatically triggered by the load board 10 and the test head 20 automatically resets without manual intervention, effectively improving test efficiency and consistency.

[0031] In step S600, after receiving the test end command, the air pressure controller controls the test head 20 to depressurize, causing the finger pressure head 22 to retract to its initial position, releasing the contact and pressure on the fingerprint chip. The test head 20 can then be used to process the fingerprint chip that has undergone the simulated finger pressure test or to perform other functional tests.

[0032] This embodiment of the application, through the coordinated operation of the load board 10, the test head 20, and the air pressure controller, enables the pressure bonding test of a single fingerprint chip at the finished product stage, improving the integrity and reliability of fingerprint chip testing. Specifically, the test head 20 serves as the fingerprint chip placement and pressure application actuator, the load board 10 serves as the test control center and signal interaction carrier, and the air pressure controller serves as a precise power source. Simultaneously, the retractable finger pressure head 22 simulates the real finger pressing action, allowing the fingerprint sensing area to complete the fingerprint chip pressure test under controlled pressure, realistically replicating the performance of the fingerprint chip under pressing conditions, and realizing simulated finger pressure testing of a single finished fingerprint chip.

[0033] In some embodiments, the test head 20 may include multiple finger pressure heads 22. The air pressure controller can control the test head 20 to perform adsorption, transfer and finger pressure actions on multiple fingerprint chips at one time. That is, in a multi-station testing scenario, multiple finger pressure heads 22 simultaneously press against their corresponding fingerprint chips. The test head 20 can complete the adsorption, transfer and simulated finger pressure test of multiple fingerprint chips at one time, thereby enabling multi-station simulated finger pressure test of a single fingerprint chip in the finished product stage, which can improve the testing efficiency of fingerprint chips.

[0034] In some embodiments, step S100, which involves using the test head 20 to adsorb the fingerprint chip and placing the fingerprint chip onto the test socket 11 of the load board 10, includes the following steps prior to: Step S10: Place the fingerprint chip in the loading area 210 of the machine. Step S20: The fingerprint chip is picked up from the loading area 210 and transferred to the first conveying mechanism 220 using the loading arm; In step S30, the fingerprint chip is transported to the test area 230 using the first transport mechanism 220.

[0035] Step S100 involves using the test head 20 to attract the fingerprint chip and placing it onto the test socket 11 of the load board 10, thereby establishing a communication connection between the fingerprint chip and the load board 10. This includes: The fingerprint chip in the test area 230 is adsorbed by the test head 20 and then transferred to the load board 10.

[0036] Here, the loading area 210 of the machine provides the starting position for materials for batch automated testing. The loading arm and the first conveying mechanism 220 are used to complete the flow from the loading station to the testing station. When the fingerprint chip arrives at the testing area 230, the testing head 20 adsorbs and picks up the fingerprint chip, using adsorption to achieve non-destructive fixation and precise gripping of the finished single fingerprint chip, and then stably moves the fingerprint chip onto the load board 10 to complete the positioning and docking before testing.

[0037] By coordinating multiple organizations, the entire process of fingerprint chip assembly, transportation, placement, and test preparation can be automated, which can improve testing efficiency and consistency, while avoiding scratches, misalignment, or poor contact of fingerprint chips during the transfer process, thus ensuring the reliability and repeatability of the finished fingerprint chip test.

[0038] This embodiment achieves stable, continuous, and non-destructive testing of finished single fingerprint chips through an integrated automated process of feeding, transferring, and testing. It relies on the machine, feeding arm, first conveying mechanism 220, test head 20, load board 10, and pneumatic control mechanism to form a complete automated testing link. The segmented material flow replaces manual or simple handling, ensuring accurate positioning and reliable transfer of the fingerprint chip from entering the machine to completing the test.

[0039] In some embodiments, step S10 involves placing the fingerprint chip in the loading area 210 of the machine, followed by: Step S21: Use the loading arm to grab the fingerprint chip and move it to the temperature-controlled area; Step S22: Preheat or precool the fingerprint chip using the temperature control zone; Step S23: The fingerprint chip is picked up from the temperature control area and transferred to the first transport mechanism 220 using the loading arm.

[0040] Here, the fingerprint chip to be tested enters the machine from the loading area 210. The loading arm then picks up the fingerprint chip from the loading area 210 and transfers it to the temperature control area. The temperature control area preheats or precools the fingerprint chip to ensure its internal temperature reaches the set value required for testing and remains stable, providing stable temperature conditions for subsequent functional testing. After temperature and processing are completed, the loading arm picks up the fingerprint chip, now at the target temperature, from the temperature control area and transfers it to the first transport mechanism 220. The first transport mechanism 220 then directionally transports the fingerprint chip to the testing area 230.

[0041] The entire process, through the multi-station transfer of the loading arm and the temperature regulation of the temperature control zone, achieves fully automated control from room temperature loading to temperature pretreatment and then to pre-test transportation. This not only ensures the effectiveness of fingerprint chip testing under different temperature environments, but also avoids testing errors caused by manual intervention or uneven temperature, further improving the testing reliability of finished fingerprint chips.

[0042] This embodiment, based on automated fingerprint chip loading and testing, adds a temperature control pre-processing step. Before the fingerprint chip enters the formal testing, it is preheated or pre-cooled in a temperature-controlled zone to raise the chip to the target testing temperature and achieve temperature uniformity, thereby simulating the working state of the fingerprint chip under different operating conditions such as high and low temperatures. The fingerprint chip testing system 1 uses a loading arm to achieve non-destructive transfer of the fingerprint chip between different stations, ensuring that the fingerprint chip enters the testing process under stable temperature conditions, which helps to improve the authenticity and reliability of the test results.

[0043] In some embodiments, step S600 involves using a pneumatic controller to control the finger pressure head 22 to retract to its original position according to a test completion command, followed by: In step S700, the fingerprint chip on the load plate 10 is adsorbed by the test head 20 and transferred to the second transport mechanism 240. In step S800, the fingerprint chip is transported to the unloading area 250 using the second conveying mechanism 240.

[0044] Here, the second conveying mechanism 240 is used to receive the fingerprint chips after testing and transport them from the testing area 230 to the unloading area 250, thus connecting testing and unloading. The unloading platform in the unloading area 250 is used to store qualified and defective chips, and the unloading arm is used to grab the fingerprint chips on the second conveying mechanism 240 according to the test results and classify and move them to the corresponding areas.

[0045] After the simulated finger pressure test is completed, the mechanism is quickly reset and the chip is unloaded by relying on the coordinated action of the load board 10, the air pressure controller and the test head 20, so that the entire test device returns to the initial standby state. This can ensure the safety of the chip and the equipment, and also improve the continuity and automation of the test process.

[0046] After the fingerprint chip test is completed, this embodiment adds a second conveying mechanism 240 and a feeding area 250. Through the automatic reset of the testing mechanism and the automatic feeding of the chip, the complete automation of the finished fingerprint chip testing process is realized. This avoids damage to the fingerprint chip caused by chip retention after testing and continuous pressure from the finger pressure head 22. At the same time, it clears the workstation for the next fingerprint chip, ensuring continuous, stable and efficient batch testing.

[0047] Specifically, after the simulated finger pressure test is completed, the load board 10 sends a test end command to the air pressure controller. The air pressure controller drives the finger pressure head 22 to retract to its original position, releasing the pressure and contact on the fingerprint sensing area, completing the reset action of the test execution mechanism, and preventing the fingerprint chip from being damaged due to continuous pressure. Then, the unloading process begins. The test head 20 once again adsorbs and fixes the fingerprint chip that has completed all the test items on the load board 10, safely and without damage picking up the fingerprint chip from the test station, and sequentially transferring it to the second transport mechanism 240 and the unloading area 250, completing the finished product test of a single fingerprint chip.

[0048] This embodiment utilizes the test head 20 to perform the chip unloading action, which can eliminate the manual handling of fingerprint chips, reduce the risk of fingerprint chip scratches, contamination, and misalignment, and also eliminate the need for an additional robotic arm, reducing costs. At the same time, it enables the rapid release of the testing station, realizes continuous automated testing of multiple fingerprint chips, and further improves the efficiency, stability, and security of finished fingerprint chip testing.

[0049] In some embodiments, step S800 involves using the second conveying mechanism 240 to convey the fingerprint chip to the unloading area 250, followed by: In step S900, the fingerprint chips in the unloading area 250 are sorted and unloaded according to the test results using the unloading arm.

[0050] Here, after the test head 20 moves the fingerprint chip that has completed all tests from the load board 10 to the unloading area 250, the machine control system obtains the results from the previous testing process, such as whether the function is normal and whether the performance meets the standards. Based on the test results, it controls the unloading arm to identify and judge the chip, and then executes the corresponding classification and unloading actions. For example, for fingerprint chips that pass the test, the unloading arm moves them to the qualified product storage station. For fingerprint chips that fail the test or are functionally inoperable, the unloading arm moves them to the dedicated defective product storage station, thereby achieving the physical separation and orderly collection of qualified and defective chips.

[0051] This embodiment, through the coordinated operation of the test head 20, the unloading arm, and the machine control system, performs classification and unloading of fingerprint chips with different test results according to preset classification standards, realizing the integration of testing and sorting. This can avoid problems such as low efficiency, misclassification, omission, and chip damage caused by manual sorting, and is conducive to improving the accuracy and efficiency of fingerprint chip factory quality control.

[0052] In some embodiments, step S100, which involves using the test head 20 to adsorb the fingerprint chip and placing the fingerprint chip onto the test socket 11 of the load board 10 to establish a communication connection between the fingerprint chip and the load board 10, includes: Step S110: Use the test head 20 to attract the non-fingerprint sensing area of ​​the fingerprint chip and move the fingerprint chip above the test base 11; Step S120: Control the test head 20 to press down on the non-fingerprint sensing area, so that the fingerprint chip comes into contact with the test base 11 and establishes a communication connection. Step S130: Control the test head 20 to maintain or remove the adsorption force on the non-fingerprint sensing area.

[0053] In step S110, the test head 20 uses negative pressure to stably adsorb the non-fingerprint sensing area, avoiding the fingerprint sensing area, and preventing the adsorption force or mechanical action from affecting the fingerprint sensing area. Then, by moving the test head 20, the fingerprint chip is smoothly moved above the test base 11 to complete the alignment.

[0054] In step S120, the test head 20 is controlled to apply downward pressure. By applying downward pressure to the non-fingerprint sensing area, the bottom pins of the fingerprint chip are tightly abutted against the test socket 11, thereby realizing the electrical conduction and communication connection between the internal circuit of the fingerprint chip and the test socket 11, providing a stable and reliable electrical path and physical support for subsequent simulated finger pressure test and functional test.

[0055] In step S130, the fingerprint chip testing method provides two selectable testing modes. These modes correspond to the test head 20 maintaining or removing its adsorption force on the non-fingerprint sensing area, adapting to different testing requirements of the finished fingerprint chip and further improving the adaptability and stability of the fingerprint chip test. The two testing modes can be automatically switched by the testing program according to actual testing needs.

[0056] When the test head 20 maintains its adsorption force on the non-fingerprint sensing area, it achieves flexible fixation through adsorption and further strengthens positioning through pressing, taking into account both the stability and flexibility of the fixation, ensuring that the fingerprint chip does not shift or fall off during the test, while avoiding damage from hard contact.

[0057] When the test head 20 removes its adhesive force on the non-fingerprint sensing area, rigid fixation is achieved solely through the mechanical pressing force of the test head 20. This is suitable for scenarios requiring higher fixation strength and where the non-fingerprint sensing area of ​​the chip has strong tolerance. Both testing modes can achieve stable fixation of the fingerprint chip on the test base 11, which is beneficial for the smooth conduct of subsequent simulated finger pressure tests.

[0058] This embodiment selects a non-fingerprint sensing area as the point of application for adsorption, transport, and alignment, ensuring accurate positioning and stable posture of the fingerprint chip during transfer and pressing. It also avoids direct contact between the test head 20 and the fingerprint sensing area, preventing signal abnormalities or physical damage. The two selectable test modes can adapt to diverse testing needs, improving the compatibility and stability of automated testing of finished fingerprint chips and ensuring the efficiency and reliability of batch testing results.

[0059] In some embodiments, step S300, using a pneumatic controller to control the extension of the finger pressure head 22 according to the pressure test command, so that the finger pressure head 22 contacts the fingerprint sensing area of ​​the fingerprint chip, includes: An air pressure controller provides air pressure to the positive pressure air passage 211 of the test head 20 to control the extension of the finger pressure head 22, so that the end face of the finger pressure head 22 that presses against the fingerprint sensing area is flush with the end face of the test head 20 that presses against the non-fingerprint sensing area. The air pressure controller is connected to the finger pressure head 22 through the positive pressure air passage 211.

[0060] Here, when the air pressure controller receives the pressure test command, it outputs stable air pressure to the finger pressure head 22 through the positive pressure air channel 211 connected to the finger pressure head 22, converting the air pressure energy into a linear driving force for the finger pressure head 22, controlling the finger pressure head 22 to extend smoothly. After the finger pressure head 22 extends into place, the end face of the finger pressure head 22 used to press the fingerprint sensing area remains flush with the end face of the test head 20 used to press the non-fingerprint sensing area, so that the finger pressure head 22 can contact the surface of the fingerprint sensing area in a uniform and close manner, avoiding the problem of excessive protrusion damaging the fingerprint chip or insufficient protrusion to effectively trigger the sensing.

[0061] Based on the flush pressing, the fingerprint sensing area and non-fingerprint sensing area of ​​the fingerprint chip are subjected to the same force, and the fingerprint chip will not warp, shift or stress concentration, ensuring stable communication connection between the fingerprint chip and the load board 10. At the same time, the fingerprint sensing array can normally convert physical contact into electrical signals and successfully complete the simulated finger pressure test.

[0062] This embodiment utilizes a pneumatic controller to provide stable and controllable air pressure to the inside of the test head 20 through the positive pressure air channel 211. The air pressure is used as a power source to drive the finger pressure head 22 to extend smoothly, avoiding the impact and displacement deviation caused by rigid mechanical transmission. At the same time, by setting the end face of the finger pressure head 22 that presses against the fingerprint sensing area to be flush with the end face of the test head 20 that presses against the non-fingerprint sensing area, local overload, tilting, or poor contact of the fingerprint chip due to height difference is avoided, improving the accuracy and consistency of finger pressure action. Thus, while protecting the chip structure, it realistically reproduces the actual use state of the fingerprint chip when the finger is pressed, ensuring that the fingerprint chip is subjected to uniform force and the signal acquisition is stable during the test, providing reliable physical conditions for simulated finger pressure test, and effectively improving the accuracy and repeatability of test results.

[0063] like Figure 2 and Figure 3As shown in the figure, this application embodiment also provides a fingerprint chip testing system 1, which includes a machine base and a fingerprint chip testing device 100. The machine base is sequentially provided with a loading area 210, a first conveying mechanism 220, and a testing area 230. The loading area 210 includes a loading platform and a loading arm. The loading arm is used to pick up the fingerprint chip from the loading platform and transfer it to the first conveying mechanism 220. The first conveying mechanism 220 is used to transport the fingerprint chip to the testing area 230.

[0064] A fingerprint chip testing device 100 is disposed in the testing area 230. The fingerprint chip testing device 100 includes a load board 10, a testing head 20, and a pneumatic controller. The load board 10 includes a testing socket 11 for placing the fingerprint chip. The load board 10 is configured to send a pressure test command when the testing program executes to the simulated finger pressure test. The load board 10 is also configured to send a test end command after the simulated finger pressure test is completed.

[0065] The test head 20 is used to attract the fingerprint chip and place it onto the test base 11, establishing a communication connection between the fingerprint chip and the load board 10. The test head 20 includes a mounting base 21 and a finger pressure head 22. The finger pressure head 22 is retractably mounted on the mounting base 21 and is used to contact the fingerprint sensing area of ​​the fingerprint chip during simulated finger pressure testing. A pneumatic controller is used to control the finger pressure head 22 to extend and contact the fingerprint sensing area upon receiving a pressure test command. The pneumatic controller is also used to control the finger pressure head 22 to retract to its original position upon receiving a test completion command.

[0066] The fingerprint chip testing system 1 of this application realizes fully automated testing of a single finished fingerprint chip from feeding and transfer to testing through the orderly layout of the functional areas of the machine and the coordinated cooperation of the various mechanisms. The fingerprint chip testing system 1 uses the machine as a carrier and connects the feeding area 210, the first conveying structure and the testing area 230 in sequence. The fingerprint chip testing device 100 is set in the testing area 230, which can realize efficient, accurate and stable testing of batch fingerprint chips.

[0067] The fingerprint chip testing device 100, through the coordinated operation of the load plate 10, the finger pressure head 22, and the air pressure controller, enables pressure bonding testing of individual fingerprint chips at the finished product stage, improving the integrity and reliability of fingerprint chip testing. Furthermore, the load plate 10 is equipped with a dedicated test socket 11, which can directly position and electrically connect the finished fingerprint chip without relying on the strip or bare die structure before packaging. This solution enables pressure bonding testing of finished fingerprint chips, which helps improve the accuracy of fingerprint chip factory inspection.

[0068] The machine serves as the installation and support platform for the entire fingerprint chip testing system 1. Through the rational layout of its functional areas, it ensures a smooth flow path for the fingerprint chips, providing a foundation for the stable operation of each mechanism. The loading platform in the loading area 210 is used to place fingerprint chips to be tested in batches. The loading arm is used to pick up the fingerprint chips from the loading platform and transfer them to the first conveying mechanism 220, realizing automated loading and initial transfer of the fingerprint chips.

[0069] The first conveying mechanism 220 receives materials from the loading arm and then transports the fingerprint chip to be tested smoothly and oriented along a preset path to the testing area 230, completing the pre-processing flow from loading to testing. The fingerprint testing device in the testing area 230 is used to perform fingerprint chip positioning, communication connection and simulated finger pressure testing, and other functional tests.

[0070] The test socket 11 on the load board 10 is used to precisely place the fingerprint chip, providing a stable physical positioning and electrical connection foundation for the fingerprint chip. The load board 10 contacts the electrical pins of the fingerprint chip through the test socket 11, and has the function of issuing test commands and transmitting test signals. Specifically, the test socket 11 carries the fingerprint chip and establishes a stable electrical connection with the fingerprint chip, which is used to test the fingerprint chip and obtain test results. It can completely export the electrical signals and recognition signals generated by the fingerprint chip under simulated pressing, thereby completing the effective testing of the acquisition, recognition, and signal output of a single finished fingerprint chip.

[0071] The mounting base 21 of the test head 20 provides fixation and extension guidance for the finger pressure head 22. The contact between the finger pressure head 22 and the fingerprint sensing area is used to simulate the finger pressing action in real-world usage scenarios to complete the simulated finger pressure test. The air pressure controller receives instructions from the load board 10 via an electrical connection and provides smooth and controllable power to the finger pressure head 22 via a transmission connection, replacing rigid transmission and preventing impact damage to the fingerprint chip. At the same time, the precise control of the extension and retraction of the finger pressure head 22 ensures the consistency and stability of the test action.

[0072] During the test, the test head 20 adsorbs and places the fingerprint chip into the test holder 11, establishing a stable communication connection between the fingerprint chip and the load board 10. When the test program reaches the simulated finger pressure test stage, the load board 10, acting as the control center, sends a pressure test command to the pneumatic controller electrically connected to it.

[0073] After receiving the pressure test command, the air pressure controller drives the finger pressure head 22 on the mounting base 21 to extend smoothly through the transmission connection with the test head 20 until the finger pressure head 22 makes precise contact with the fingerprint sensing area of ​​the fingerprint chip on the test base 11, simulating the real state of human finger pressing and providing physical conditions for the simulated finger pressure test.

[0074] After the simulated finger pressure test is completed, the load board 10 sends a test end command to the pneumatic controller. Upon receiving the command, the pneumatic controller controls the finger pressure head 22 to retract to its original position, releasing the pressure and contact on the fingerprint chip. The subsequent testing system can then perform other tests on the fingerprint chip or, based on the pressure test results, cut the fingerprint chip into finished products.

[0075] In this way, the synchronous control of electrical signals and mechanical actions can avoid problems such as positional deviation and uneven pressure caused by manual pressing, reduce human operation errors, improve test consistency and repeatability, and facilitate automated and batch testing.

[0076] In some embodiments, the load plate 10 may include a plurality of test sockets 11, each test socket 11 being used to hold a fingerprint chip, and the fingerprint chip testing device 100 includes a plurality of test heads 20, each test head 20 including a plurality of finger pressure heads 22, each finger pressure head 22 being applied to press a fingerprint chip, thereby enabling fingerprint chip testing in multi-test station scenarios.

[0077] In some embodiments, a positive pressure air passage 211 is provided inside the mounting base 21. The air pressure controller is connected to the finger pressure head 22 through the positive pressure air passage 211. When the load board 10 issues a pressing test command, the air pressure controller starts and outputs air pressure. The airflow is stably transmitted to the finger pressure head 22 along the positive pressure air passage 211 inside the mounting base 21. Under the action of air pressure, the finger pressure head 22 is pushed to extend in a preset direction, so that it can reliably contact and press the fingerprint sensing area of ​​the fingerprint chip to be tested, simulating the finger pressing to trigger the chip to collect and recognize fingerprints.

[0078] After the simulated finger pressure test is completed, the air pressure controller releases pressure or supplies air in reverse through the positive pressure air channel 211, causing the finger pressure head 22 to retract along the extension direction under the action of air pressure difference or reset structure, releasing the pressure and contact on the fingerprint chip, and restoring it to the initial state, in preparation for the next simulated finger pressure test of the fingerprint chip.

[0079] In some embodiments, the test head 20 further includes a pressure cap structure 23, which is disposed on the side of the mounting base 21 facing the load plate 10 and located beside the finger pressure head 22. The pressure cap structure 23 is provided with a suction nozzle 231, which is used to adsorb the non-fingerprint sensing area of ​​the fingerprint chip. A negative pressure air channel 212 is provided in the mounting base 21, one end of which is connected to the suction nozzle 231, and the other end is used to connect to a vacuum generator.

[0080] Specifically, the negative pressure airway 212 transmits the negative pressure generated by the vacuum generator to the suction nozzle 231, using the negative pressure suction to adsorb and fix the non-fingerprint sensing area of ​​the fingerprint chip, thereby stably positioning the fingerprint chip on the test base 11 before testing. The pressure cover structure 23 is located beside the finger pressure head 22, which can reliably adsorb the non-fingerprint sensing area of ​​the fingerprint chip without interfering with the pressing action of the finger pressure head 22.

[0081] In some embodiments, the fingerprint chip testing system 1 further includes a temperature control zone, which is located between the loading zone 210 and the first conveying mechanism 220, for preheating or precooling the fingerprint chip.

[0082] Here, the fingerprint chip to be tested enters the machine from the loading area 210. The loading arm then picks up the fingerprint chip from the loading area 210 and transfers it to the temperature control area. The temperature control area preheats or precools the fingerprint chip to ensure its internal temperature reaches the set value required for testing and remains stable, providing stable temperature conditions for subsequent functional testing. After temperature and processing are completed, the loading arm picks up the fingerprint chip, now at the target temperature, from the temperature control area and transfers it to the first transport mechanism 220. The first transport mechanism 220 then directionally transports the fingerprint chip to the testing area 230.

[0083] The entire process, through the multi-station transfer of the loading arm and the temperature regulation of the temperature control zone, achieves fully automated control from room temperature loading to temperature pretreatment and then to pre-test transportation. This not only ensures the effectiveness of fingerprint chip testing under different temperature environments, but also avoids testing errors caused by manual intervention or uneven temperature, further improving the testing reliability of finished fingerprint chips.

[0084] This embodiment adds a temperature control zone between the loading area 210 and the first conveying mechanism 220. Before the fingerprint chip enters the formal testing, the temperature control zone preheats or precools the fingerprint chip, raising it to the target testing temperature and achieving temperature uniformity. This simulates the working state of the fingerprint chip under different operating conditions such as high and low temperatures. The fingerprint chip testing system 1 uses a loading arm to achieve non-destructive transfer of the fingerprint chip between different stations, ensuring that the fingerprint chip enters the testing process under stable temperature conditions, which helps improve the authenticity and reliability of the test results.

[0085] In some embodiments, the machine tool further includes a second conveying mechanism 240 and a unloading area 250. The test head 20 is also used to adsorb the fingerprint chip on the load plate 10 after the finger pressure head retracts to its original position and transfer the fingerprint chip to the second conveying mechanism 240, which is used to transport the fingerprint chip to the unloading area 250. The unloading area 250 includes an unloading platform and an unloading arm, which is used to pick up the fingerprint chip from the second conveying mechanism 240 and place it into the unloading area 250.

[0086] Here, the second conveying mechanism 240 is used to receive the fingerprint chips after testing and transport them from the testing area 230 to the unloading area 250, thus connecting testing and unloading. The unloading platform in the unloading area 250 is used to store qualified and defective chips, and the unloading arm is used to grab the fingerprint chips on the second conveying mechanism 240 according to the test results and classify and move them to the corresponding areas.

[0087] This embodiment adds a second conveying mechanism 240 and a material unloading area 250 after the test area 230, realizing full-process automation and process management of fingerprint chip testing, which helps to improve the reliability of fingerprint chip testing.

[0088] It should be noted that some embodiments of this application have been described above. Other embodiments are within the scope of the appended claims. In some cases, the actions or steps described in the claims can be performed in a different order than that shown in the above embodiments and still achieve the desired result. In addition, the processes depicted in the drawings do not necessarily require the specific order or sequential order shown to achieve the desired result.

[0089] Those skilled in the art should understand that the discussion of any of the above embodiments is merely exemplary and is not intended to imply that the scope of this application (including the claims) is limited to these examples; under the concept of this application, the technical features of the above embodiments or different embodiments can also be combined, the steps can be implemented in any order, and there are many other variations of different aspects of the above embodiments of this application, which are not provided in detail for the sake of brevity.

[0090] The embodiments of this application are intended to cover all such substitutions, modifications, and variations that fall within the broad scope of the appended claims. Therefore, any omissions, modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the embodiments of this application should be included within the protection scope of this application.

Claims

1. A method of testing a fingerprint chip, the method comprising: include: A fingerprint chip is adsorbed using a test head and placed onto a test socket on a load board, thereby establishing a communication connection between the fingerprint chip and the load board. The test head includes a mounting base and a finger pressure head, which is retractably mounted on the mounting base. When the test program is executed to the simulated finger pressure test, the load board sends a pressure test command to the air pressure controller. The air pressure controller is used to control the extension of the finger pressure head according to the pressure test command, so that the finger pressure head contacts the fingerprint sensing area of ​​the fingerprint chip; The fingerprint chip was subjected to a simulated finger pressure test; After the simulated finger pressure test is completed, the load board sends a test end command to the air pressure controller; The pressure controller is used to retract the finger pressure head back to its original position according to the test end command.

2. The fingerprint chip testing method of claim 1, wherein, The step of using a test head to adsorb the fingerprint chip and placing the fingerprint chip onto the test socket of the load board to establish a communication connection between the fingerprint chip and the load board includes the following prior steps: Place the fingerprint chip in the loading area of ​​the machine; The fingerprint chip is picked up from the loading area and transferred to the first conveying mechanism using a loading arm; The fingerprint chip is transported to the testing area using the first transport mechanism; The step of using a test head to adsorb the fingerprint chip and placing the fingerprint chip onto the test socket of the load board to establish a communication connection between the fingerprint chip and the load board includes: The fingerprint chip in the test area is adsorbed by the test head and then transferred to the load board.

3. The fingerprint chip testing method of claim 2, wherein, The step of placing the fingerprint chip in the loading area of ​​the machine includes: The fingerprint chip is picked up and placed in the temperature-controlled area using the loading arm. The fingerprint chip is preheated or precooled using the temperature control zone; The fingerprint chip is picked up from the temperature-controlled area and transferred to the first conveying mechanism using the loading arm.

4. The fingerprint chip testing method of claim 1, wherein, The step of using the air pressure controller to control the finger pressure head to retract to its original position according to the test end command includes: The fingerprint chip on the load plate is adsorbed by the test head and then transferred to the second transport mechanism; The fingerprint chip is transported to the unloading area using the second conveying mechanism.

5. The fingerprint chip testing method of claim 4, wherein, The process of using the second conveying mechanism to transport the fingerprint chip to the unloading area includes: The fingerprint chips in the unloading area are sorted and unloaded according to the test results using an unloading arm.

6. The fingerprint chip testing method of claim 1, wherein, The step of using a test head to adsorb the fingerprint chip and placing the fingerprint chip onto the test socket of the load board to establish a communication connection between the fingerprint chip and the load board includes: The test head is used to attract the non-fingerprint sensing area of ​​the fingerprint chip and move the fingerprint chip above the test base; The test head is controlled to press down on the non-fingerprint sensing area, so that the fingerprint chip comes into contact with the test socket and establishes a communication connection; Control the test head to maintain or remove the adsorption force on the non-fingerprint sensing area.

7. The fingerprint chip testing method of claim 6, wherein, The step of using the air pressure controller to control the extension of the finger pressure head according to the pressure test command, so that the finger pressure head contacts the fingerprint sensing area of ​​the fingerprint chip, includes: The air pressure controller provides air pressure to the positive pressure air channel of the test head to control the extension of the finger pressure head, so that the end face of the finger pressure head pressing against the fingerprint sensing area is flush with the end face of the test head pressing against the non-fingerprint sensing area; wherein, the air pressure controller is connected to the finger pressure head through the positive pressure air channel.

8. A fingerprint chip test system characterized by, include: The machine is provided with a loading area, a first conveying mechanism and a testing area in sequence. The loading area includes a loading platform and a loading arm. The loading arm is used to pick up the fingerprint chip from the loading platform and transfer it to the first conveying mechanism. The first conveying mechanism is used to transport the fingerprint chip to the testing area. A fingerprint chip testing device is disposed in the testing area, and the fingerprint chip testing device includes: A load board includes a test socket for placing a fingerprint chip, the load board being configured to send a pressure test command when the test program executes to a simulated finger pressure test, and the load board being further configured to send a test end command after the simulated finger pressure test is completed; The test head is used to adsorb the fingerprint chip and move the fingerprint chip onto the test base, so that the fingerprint chip establishes a communication connection with the load board; the test head includes a mounting base and a finger pressure head, the finger pressure head is retractably mounted on the mounting base, and the finger pressure head is used to contact the fingerprint sensing area of ​​the fingerprint chip during simulated finger pressure testing; A pneumatic controller is provided, which is used to control the finger pressure head to extend and contact the fingerprint sensing area after receiving the pressure test command. The pneumatic controller is also used to control the finger pressure head to retract to its original position after receiving the test end command.

9. The fingerprint chip test system of claim 8, wherein, The machine also includes: A temperature control zone is located between the feeding zone and the first conveying mechanism, and is used to preheat or precool the fingerprint chip.

10. The fingerprint chip test system of claim 8, wherein, The machine also includes a second conveying mechanism and a feeding area; the test head is also used to adsorb the fingerprint chip on the load plate after the finger pressure head retracts to its original position, and to transfer the fingerprint chip to the second conveying mechanism, which is used to transport the fingerprint chip to the feeding area; the feeding area includes a feeding platform and a feeding arm, which is used to grab the fingerprint chip from the second conveying mechanism and transfer it to the feeding area.

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