Detection device for rapidly detecting CAF failure of circuit board

Abstract

The utility model relates to the technical field of circuit board CAF failure detection, and discloses a detection device for rapidly detecting circuit board CAF failure, which comprises a machine body, a detection shell is arranged in the machine body, two sensors are fixedly mounted on the upper surface of the detection shell, and the detection end of each sensor penetrates through the detection shell. A drawing plate is arranged in the detection shell, two sliding grooves are formed in the bottom face of the drawing plate, and a guide rail is slidably connected into each sliding groove. The detection device for rapidly detecting the CAF failure of the circuit board is provided with a machine body, a detection shell, a sensor, a drawing plate, a sliding groove, a guide rail, a heating and refrigerating all-in-one machine, a humidifying and dehumidifying all-in-one machine, a high-voltage power supply, a condensate water preventing clamp, a circuit board main body, an ultrasonic scanning microscope, a lifting block, a lifting sliding rail, a first sliding rail, a connecting plate, a movable sliding block and a second sliding rail. Through non-contact scanning and real-time data analysis, rapid detection and diagnosis of the CAF failure of the circuit board are realized.

Description

Technical Field

[0001] The utility model relates to the technical field of circuit board CAF failure detection, in particular to a detection device for quickly detecting circuit board CAF failure. Background Technique

[0002] With the rapid development of electronic technology, the integration and complexity of electronic products are increasing continuously. As the core component of electronic products, the quality and reliability of circuit boards are directly related to the overall performance and lifespan of products. However, various failure problems often occur during the production and use of PCBs. Among them, conductive anode filament failure is a relatively common one. The CAF phenomenon not only affects the performance of circuit boards but may also cause serious safety hazards and economic losses. CAF failure refers to the migration of copper ions along the interface between resin and glass fiber under specific conditions in the insulating layer of circuit boards, forming a filament-like conductive channel, thereby resulting in a decline in the insulation performance of circuit boards and even causing faults such as short circuits.

[0003] PCB failure analysis mainly relies on traditional techniques such as visual inspection, X-ray fluoroscopy, section analysis, thermal analysis, and scanning electron microscopy. These techniques can, to a certain extent, identify and analyze the causes of PCB failures, but there are problems such as long detection cycles, strong sample destructiveness, and complex operations. Especially for CAF failure, traditional detection methods are difficult to achieve fast, non-destructive, and efficient detection. Therefore, those skilled in the art have provided a detection device for quickly detecting circuit board CAF failure to solve the problems raised in the above background technique. Content of the Utility Model

[0004] The purpose of the utility model is to provide a detection device for quickly detecting circuit board CAF failure to solve the problems raised in the above background technique.

[0005] To achieve the above purpose, the utility model provides the following technical solutions:

[0006] A detection device for quickly detecting the CAF failure of a circuit board, comprising a machine body. Inside the machine body, there is a detection housing. On the upper surface of the detection housing, two sensors are fixedly installed, and the detection end of each sensor passes through the detection housing. Inside the detection housing, there is a pull-out plate. On the bottom surface of the pull-out plate, two sliding grooves are opened. Inside each sliding groove, a guide rail is slidably connected. The bottom surface of each guide rail is fixedly connected to the inner bottom wall of the machine body. Inside the pull-out plate, a heating and cooling integrated machine is fixedly installed. Inside the pull-out plate, a humidifying and dehumidifying integrated machine is fixedly installed. Inside the pull-out plate, two high-voltage power supplies are fixedly installed. Above each high-voltage power supply, there is an anti-condensation water clamp. Inside each anti-condensation water clamp, there is a circuit board main body. Above the detection housing, there is an ultrasonic scanning microscope. On the outer surface of the ultrasonic scanning microscope, a lifting block is fixedly installed. The outer surface of the lifting block is slidably connected to a lifting slide rail. The outer surface of the lifting slide rail is slidably connected to a first slide rail. On the front and back surfaces of the first slide rail, connecting plates are fixedly installed. On one side surface of the two connecting plates close to each other, moving sliders are fixedly installed. Inside each moving slider, a second slide rail is slidably connected.

[0007] As a further scheme of the present utility model: Two groups of bases are fixedly installed on the bottom surface of the machine body, and the two groups of bases are distributed in a rectangular shape below the machine body.

[0008] As a further scheme of the present utility model: Two installation grooves are opened on the upper surface of the machine body. Each second slide rail is installed on the inner wall of the installation groove, and the outer surface of each moving slider is in contact with the inner wall of the installation groove.

[0009] As a further scheme of the present utility model: A transparent plate is arranged on the outer surface of the machine body, and the inner wall of the transparent plate is in contact with the outer surface of the detection housing.

[0010] As a further scheme of the present utility model: A support plate is fixedly installed on the front surface of the machine body, and a control machine is fixedly installed on the upper surface of the support plate.

[0011] As a further scheme of the present utility model: Two groups of telescopic pressure rods are fixedly installed on the upper surface of each high-voltage power supply. The outer surface of each telescopic pressure rod is threadedly connected with a mounting plate, and a fixing rod is fixedly installed on the inner wall of each mounting plate.

[0012] As a further scheme of the present utility model: The outer surface of each group of telescopic pressure rods is threadedly connected with a fastening nut, and the bottom surface of each fastening nut is in contact with the upper surface of the mounting plate.

[0013] Compared with the prior art, the beneficial effects of the present utility model are:

[0014] The utility model realizes the rapid detection and diagnosis of CAF failure of the circuit board through non-contact scanning and real-time data analysis by setting an organism, a detection housing, a sensor, a draw plate, a chute, a guide rail, a heating and cooling integrated machine, a humidifying and dehumidifying integrated machine, a high-voltage power supply, an anti-condensation fixture, a circuit board main body, an ultrasonic scanning microscope, a lifting block, a lifting slide rail, a first slide rail, a connecting plate, a moving slider and a second slide rail. The high-voltage power supply can simulate the voltage stress in the actual working environment, accelerate the formation or appearance of CAF, and can provide a suitable temperature and humidity environment for the CAF detection of the circuit board. Finally, the ultrasonic scanning microscope scans the abnormal area of the failed PCB board, so as to show the CAF failure phenomenon. The overall structure can greatly shorten the detection cycle, improve the production efficiency, adopt non-contact detection, avoid damaging the sample, and reduce the detection cost. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 FIG. 7 is a schematic diagram of the overall structure of a detection device for rapidly detecting CAF failure of a circuit board;

[0016] Figure 2 FIG. 11 is a three-dimensional structure diagram of the detection housing in a detection device for rapidly detecting CAF failure of a circuit board;

[0017] Figure 3 FIG. 15 is a three-dimensional structure diagram of the first slide rail in a detection device for rapidly detecting CAF failure of a circuit board;

[0018] Figure 4 FIG. 19 is a three-dimensional structure diagram of the body in a detection device for rapidly detecting CAF failure of a circuit board;

[0019] Figure 5 FIG. 23 is a three-dimensional structure diagram of the draw plate in a detection device for rapidly detecting CAF failure of a circuit board;

[0020] Figure 6 FIG. 27 is a three-dimensional structure diagram of the telescopic push rod in a detection device for rapidly detecting CAF failure of a circuit board.

[0021] In the figure: 1. Body; 2. Transparent plate; 3. Support plate; 4. Control machine; 5. Draw plate; 6. Detection housing; 7. Sensor; 8. First slide rail; 9. Moving slider; 10. Connecting plate; 11. Second slide rail; 12. Base; 13. Lifting slide rail; 14. Lifting block; 15. Ultrasonic scanning microscope; 16. Guide rail; 17. Installation groove; 18. Chute; 19. Heating and cooling integrated machine; 20. Humidifying and dehumidifying integrated machine; 21. High-voltage power supply; 22. Fastening nut; 23. Fixed rod; 24. Circuit board main body; 25. Anti-condensation fixture; 26. Installation plate; 27. Telescopic push rod. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0022] Please refer to Figure 1-6 , a detection device for quickly detecting the CAF failure of a circuit board, comprising a body 1. Inside the body 1, a detection housing 6 is provided. On the upper surface of the detection housing 6, two sensors 7 are fixedly installed, and the detection end of each sensor 7 passes through the detection housing 6. Inside the detection housing 6, a pull-out plate 5 is provided. On the bottom surface of the pull-out plate 5, two sliding grooves 18 are opened. Inside each sliding groove 18, a guide rail 16 is slidably connected. The bottom surface of each guide rail 16 is fixedly connected to the inner bottom wall of the body 1. Inside the inner wall of the pull-out plate 5, a heating and cooling integrated machine 19 is fixedly installed. Inside the inner wall of the pull-out plate 5, a humidifying and dehumidifying integrated machine 20 is fixedly installed. Inside the inner wall of the pull-out plate 5, two high-voltage power supplies 21 are fixedly installed. Above each high-voltage power supply 21, an anti-condensation clamp 25 is provided. Inside each anti-condensation clamp 25, a circuit board main body 24 is provided. Above the detection housing 6, an ultrasonic scanning microscope 15 is provided. On the outer surface of the ultrasonic scanning microscope 15, a lifting block 14 is fixedly installed. On the outer surface of the lifting block 14, a lifting slide rail 13 is slidably connected. On the outer surface of the lifting slide rail 13, a first slide rail 8 is slidably connected. On the front and back surfaces of the first slide rail 8, connecting plates 10 are fixedly installed. On the side surfaces of the two connecting plates 10 close to each other, moving sliders 9 are fixedly installed. Inside each moving slider 9, a second slide rail 11 is slidably connected.

[0023] On the bottom surface of the body 1, two groups of bases 12 are fixedly installed, and the two groups of bases 12 are distributed in a rectangle below the body 1. By providing the bases 12, the function of supporting the body 1 is achieved, which can facilitate the stable placement of the body 1. On the upper surface of the body 1, two installation grooves 17 are opened. Each second slide rail 11 is installed on the inner wall of the installation groove 17. The outer surface of each moving slider 9 is in contact with the inner wall of the installation groove 17. By providing the installation grooves 17, the installation of the second slide rails 11 is facilitated, and it is convenient to fix the second slide rails 11 on the body 1. On the outer surface of the body 1, a transparent plate 2 is provided. The inner wall of the transparent plate 2 is in contact with the outer surface of the detection housing 6. Through the transparent plate 2, the detection part above the body 1 can be enclosed, which can prevent external objects from affecting the detection.

[0024] A support plate 3 is fixedly installed on the front of the body 1, and a control machine 4 is fixedly installed on the upper surface of the support plate 3. Through the support plate 3 and the control machine 4, the control machine 4 adopts a human-machine interaction interface to simplify the operation process. On the upper surface of each high-voltage power supply 21, two sets of telescopic pressure rods 27 are fixedly installed. A mounting plate 26 is threadedly connected to the outer surface of each telescopic pressure rod 27. A fixing rod 23 is fixedly installed on the inner wall of each mounting plate 26. Through the telescopic pressure rod 27, the mounting plate 26, and the fixing rod 23, the mounting plate 26 rotates at the top of the telescopic pressure rod 27 to change the direction and position of the fixing rod 23, and the height can be adjusted by the telescopic pressure rod 27 to fix the circuit board body 24. A fastening nut 22 is threadedly connected to the outer surface of each set of telescopic pressure rods 27. The bottom surface of each fastening nut 22 is in contact with the upper surface of the mounting plate 26. Through the fastening nut 22, the mounting plate 26 is limited to prevent the mounting plate 26 from being easily screwed off the telescopic pressure rod 27.

[0025] The working principle of the present utility model is as follows: When in use, the draw-out plate 5 is pulled out from the detection housing 6. Outside the body 1, the circuit board body 24 is installed in the anti-condensation water fixture 25, and the position of the fixing rod 23 is adjusted, and the height of the fixing rod 23 is adjusted. The fixing rod 23 is used to fix the circuit board body 24. After the circuit board body 24 is fixed, the circuit board body 24 is sent into the detection housing 6. Before detection, the heating and cooling integrated machine 19 and the humidification and dehumidification integrated machine 20 can be started respectively. According to the required working environment, the heating and cooling integrated machine 19 and the humidification and dehumidification integrated machine 20 create a working environment for CAF failure detection. During detection, the high-voltage power supply 21 applies a controllable high voltage to the circuit board body 24 to simulate the voltage stress in the actual working environment and accelerate the formation or manifestation of CAF. Then, the ultrasonic scanning microscope 15 scans the circuit board body 24. Using ultrasonic waves to image microscopic objects, it can detect possible CAF failure problems inside the circuit board body 24. When the ultrasonic scanning microscope 15 is in use, the movement of the ultrasonic scanning microscope 15 in each direction is controlled by the first slide rail 8, the second slide rail 11, the lifting slide rail 13, etc., and the circuit board body 24 can be detected quickly, accurately, and without damage.

[0026] The above-mentioned is only the preferred specific implementation manner of the present utility model, but the protection scope of the present utility model is not limited thereto. Any person skilled in the art within the technical scope disclosed by the present utility model, according to the technical solution of the present utility model and its inventive concept, makes equivalent replacements or changes, and should be covered by the protection scope of the present utility model.

Claims

1. A detection device for quickly detecting CAF failure of a circuit board, comprising a body (1), characterized in that: Inside the body (1), a detection housing (6) is provided. On the upper surface of the detection housing (6), two sensors (7) are fixedly installed, and the detection end of each sensor (7) passes through the detection housing (6). Inside the detection housing (6), a drawer plate (5) is provided. On the bottom surface of the drawer plate (5), two sliding grooves (18) are formed. Inside each sliding groove (18), a guide rail (16) is slidably connected. The bottom surface of each guide rail (16) is fixedly connected to the inner bottom wall of the body (1). Inside the inner wall of the drawer plate (5), a heating and cooling integrated machine (19) is fixedly installed. Inside the inner wall of the drawer plate (5), a humidifying and dehumidifying integrated machine (20) is fixedly installed. Inside the inner wall of the drawer plate (5), two high-voltage power supplies (21) are fixedly installed. Above each high-voltage power supply (21), a condensation prevention clamp (25) is provided. Inside each condensation prevention clamp (25), a circuit board main body (24) is provided. Above the detection housing (6), an ultrasonic scanning microscope (15) is provided. On the outer surface of the ultrasonic scanning microscope (15), a lifting block (14) is fixedly installed. On the outer surface of the lifting block (14), a lifting slide rail (13) is slidably connected. On the outer surface of the lifting slide rail (13), a first slide rail (8) is slidably connected. On the front and back surfaces of the first slide rail (8), connecting plates (10) are fixedly installed. On one side surface of the two connecting plates (10) close to each other, moving sliders (9) are fixedly installed. Inside each moving slider (9), a second slide rail (11) is slidably connected.

2. The detection device for quickly detecting the CAF failure of a circuit board according to claim 1, characterized in that: On the bottom surface of the body (1), two groups of bases (12) are fixedly installed, and the two groups of bases (12) are distributed in a rectangular shape below the body (1).

3. The detecting device for quickly detecting CAF failure of a circuit board according to claim 1, characterized in that: On the upper surface of the body (1), two installation grooves (17) are formed. Each second slide rail (11) is installed on the inner wall of the installation groove (17), and the outer surface of each moving slider (9) is in contact with the inner wall of the installation groove (17).

4. The detection device for quickly detecting the CAF failure of a circuit board according to claim 1, characterized in that: On the outer surface of the body (1), a transparent plate (2) is provided, and the inner wall of the transparent plate (2) is in contact with the outer surface of the detection housing (6).

5. The detection device for rapidly detecting CAF failure of a circuit board according to claim 1, wherein: On the front surface of the body (1), a support plate (3) is fixedly installed, and on the upper surface of the support plate (3), a control machine (4) is fixedly installed.

6. The detecting device for quickly detecting the CAF failure of a circuit board according to claim 1, wherein: On the upper surface of each high-voltage power supply (21), two groups of telescopic pressure rods (27) are fixedly installed. On the outer surface of each telescopic pressure rod (27), a mounting plate (26) is threadedly connected. Inside the inner wall of each mounting plate (26), a fixing rod (23) is fixedly installed.

7. The detecting device for quickly detecting CAF failure of a circuit board according to claim 6, wherein: On the outer surface of each group of telescopic pressure rods (27), a fastening nut (22) is threadedly connected, and the bottom surface of each fastening nut (22) is in contact with the upper surface of the mounting plate (26).

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