Automatic detection device for needle point position of PCB (Printed Circuit Board)
By designing an automatic detection device, the maintenance process of PCB board needle cards is simplified, efficient and accurate needle tip position detection is achieved, time-consuming, labor-intensive and cost-effective problems in the existing technology, and is suitable for the detection needs of a variety of probe cards.
Patent Information
- Application Number
- CN202422451192.X
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-10-10
- Publication Date
- 2025-07-18
- Estimated Expiration
- 2034-10-10
AI Technical Summary
In the prior art, the PCB board pin card maintenance process is time-consuming and labor-intensive, and requires frequent borrowing of equipment for verification, resulting in high testing costs and low production efficiency, and the risk of needle marks deviating from the pad.
An automatic detection device for the needle tip position of the PCB board is designed, including a conveying mechanism, a microscope and a control mechanism. Through the combination of parallel guide rails, rocker and a conveying base, the automatic detection of the needle tip position is achieved, equipped with angle and speed adjustment functions to meet different detection needs.
The maintenance process is simplified, the detection efficiency and accuracy is improved, the production impact and needle mark deviation risks caused by testing machine borrowing are reduced, and the cost is reduced. It is suitable for probe cards of different sizes and types.
Smart Images
Figure CN223122163U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of PCB board pin position detection, and specifically relates to an automatic detection device for the tip position of a PCB board. Background Art
[0002] With the continuous improvement of the integrated circuit chip manufacturing process, the accuracy requirements of testing equipment are also gradually increasing; especially in the trend of continuous reduction of chip size and density, the design and manufacturing of PCB boards (probe cards) become more complex; the PCB board is an indispensable tool in the integrated circuit chip testing, and its main function is to contact the pads of the chip through multiple fine needles to ensure accurate testing of electrical performance.
[0003] After the mainstream cantilever probe cards on the current market undergo maintenance, it is usually necessary to verify the tip position through mass production testing equipment to ensure that each tip accurately penetrates into the pad; however, this process is time-consuming and laborious, and requires frequent equipment borrowing and wafer verification, which not only increases the equipment occupation time, affects normal mass production, but also poses a risk of needle marks deviating from the pads, resulting in an increase in testing costs and a decrease in production efficiency.
[0004] Therefore, how to simplify the maintenance process of the PCB board while ensuring the maintenance quality of the needle card, and reduce the costs and risks caused by repeated verification has become an urgent technical problem in the industry. Summary of the Utility Model
[0005] The purpose of the utility model is to provide an automatic detection device for the tip position of a PCB board, and the purpose of the utility model is achieved by adopting the following technical solutions:
[0006] The utility model provides an automatic detection device for the tip position of a PCB board, which includes:
[0007] A conveying mechanism, the conveying mechanism includes a parallel guide rail, a moving base, a rocker and a conveying base which are connected in sequence from top to bottom, the parallel guide rail is arranged on the moving base along the Y direction for placing the PCB board; the rocker is arranged on the side of the moving base, and the rocker controls the movement of the moving base; the moving base is movably connected to the conveying base through a motor transmission wheel;
[0008] A microscope for capturing the tip position of the PCB board;
[0009] A control mechanism, the control mechanism is electrically connected to the conveying base for driving the conveying base to drive the moving base; the microscope is electrically connected to the control mechanism.
[0010] Preferably, a plurality of positioning holes are arranged on the parallel guide rail for fixing the PCB board.
[0011] Further, the rocker includes an X-axis rocker and a Y-axis rocker, and the movement of the moving base in the X and Y directions is controlled by the X-axis rocker and the Y-axis rocker.
[0012] Preferably, an angle adjustment knob is provided on the transfer base, and the angle adjustment knob is used to adjust the inclination angle of the transfer base so as to adjust the levelness of the PCB board.
[0013] Further, a speed adjustment knob is provided on the transfer base, and the speed adjustment knob is connected to the control mechanism for controlling the moving speed of the transfer base.
[0014] Preferably, a cold light source is further included, and the microscope is connected to the cold light source to achieve brightness adjustment.
[0015] Preferably, a support base is connected to the microscope in the Z direction, and a slide rail is connected to the support base in the X direction, and the microscope slides in the X direction through the slide rail.
[0016] Further, the microscope is fixed in the X and Y directions, and the microscope has a Z-axis travel of 5 cm in the Z direction.
[0017] Preferably, the PCB board tip position automatic detection device further includes an imager, and the imager is electrically connected to the control mechanism.
[0018] Compared with the prior art, the PCB board tip position automatic detection device provided by the present utility model has the following beneficial effects:
[0019] First, through the combination of the microscope and the control mechanism of the present utility model, the detection of the tip position of the needle card can be completed automatically, avoiding the cumbersome process of repeatedly verifying the tip position on and off the machine table in the traditional solution, and greatly simplifying the maintenance and detection process of the needle card.
[0020] Second, the combined design of the parallel guide rail, rocker and transfer base of the present utility model can achieve high-precision detection of the tip position of the needle card through precise control of the X-axis, Y-axis and Z-axis, ensuring that each tip is accurately positioned within the pad.
[0021] Third, in the process of repairing and detecting the probe card of the present utility model, the link of using the production machine and wafer for needle mark testing is omitted, avoiding the influence on the mass production efficiency due to the borrowing of the testing machine, and at the same time reducing the scrapping risk caused by needle mark deviation, saving a large amount of production costs.
[0022] Fourth, the device of the present utility model is equipped with an angle adjustment knob and a speed adjustment knob, enabling flexible adjustment of the inclination angle and moving speed of the device under different PCB board specifications and detection requirements, further improving the detection efficiency.
[0023] Fifth, the device of the present utility model can be applied to PCB boards of different sizes and various types of probe cards, having strong versatility and expandability, and is suitable for the probe card detection requirements in large-scale production environments.
[0024] Sixth, through the combination of a cold light source and a microscope, the present utility model ensures clear imaging under different lighting conditions. At the same time, the cooperation between the imager and the control mechanism enables the detection results of the tip position to be automatically recorded and generate a report, further improving the degree of detection automation. BRIEF DESCRIPTION OF THE DRAWINGS
[0025] In order to more clearly illustrate the technical solutions of the embodiments of the present utility model, the drawings required for use in the embodiments will be briefly introduced below. Obviously, the drawings in the following description are only some embodiments of the present utility model. For those of ordinary skill in the art, without creative efforts, other drawings can be obtained based on these drawings.
[0026] Figure 1 It is a schematic structural diagram of the automatic PCB board tip position detection device of the present utility model;
[0027] Figure 2 It is a flowchart of the use of the automatic PCB board tip position detection device of the present utility model.
[0028] DESCRIPTION OF THE REFERENCE NUMERALS
[0029] 1. Parallel guide rail; 2. Moving base; 31. X-axis rocker; 32. Y-axis rocker; 4. Conveyor base; 41. Angle adjustment knob; 42. Speed adjustment knob; 5. Control mechanism; 6. Microscope; 7. Cold light source; 8. Imager. DETAILED DESCRIPTION OF THE EMBODIMENTS
[0030] The embodiments of the present utility model will be described in detail below with reference to the drawings.
[0031] The following describes the implementation modes of the present utility model through specific examples. Those skilled in the art can easily understand the other advantages and effects of the present utility model from the content disclosed in this specification. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all embodiments; for example, the present utility model can also be implemented or applied through other different specific implementation modes. For example, the present utility model takes the pin position detection of the probe card as a preferred embodiment, but it should be understood that the present utility model can be applied to the pin position detection of all PCB boards; various details in this specification can also be modified or changed based on different viewpoints and applications without departing from the spirit of the present utility model. It should be noted that, without conflict, the following embodiments and the features in the embodiments can be combined with each other. Based on the embodiments in the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative work belong to the scope of protection of the present utility model.
[0032] It should be noted that the following describes various aspects of the embodiments within the scope of the appended claims. It should be obvious that the aspects described herein can be embodied in a wide variety of forms, and any specific structure and / or function described herein is illustrative only. Based on the present utility model, those skilled in the art should understand that one aspect described herein can be implemented independently of any other aspect, and two or more of these aspects can be combined in various ways. For example, any number and aspects described herein can be used to implement the device and / or practice the method. Additionally, this device can be implemented and this method can be practiced using other structures and / or functionality in addition to one or more of the aspects described herein.
[0033] Based on this, the embodiments of this specification propose a PCB board pin position detection solution: this solution uses an automatic detection method to confirm whether the pin positions of the probe card are in the correct positions.
[0034] Embodiment 1:
[0035] For example Figure 1As shown in the figure, this embodiment provides an automatic detection device for the tip position of a probe card, which includes a conveying mechanism, a microscope 6, a control mechanism 5, and a light source and an imager 8 for assisting detection; the conveying mechanism is composed of parallel guide rails 1, a moving base 2, a rocker and a conveying base 4; the parallel guide rails 1 are installed on the moving base 2 and extend along the Y direction for placing the probe card; a number of positioning holes are provided on the slide rail, and probe cards of different sizes are fixed through the positioning holes and screw pins, ensuring the stability of the probe card in the device and being able to adapt to probe cards of 6 inches, 8 inches, 12 inches and larger sizes; the moving base 2 is adjusted in position through an X-axis rocker 31 and a Y-axis rocker 32, and the operator can precisely control the position of the moving base 2 in the X and Y directions by rotating the rocker, with a positioning accuracy of up to ±2 microns; the conveying base 4 is movably connected to the moving base 2 through a motor transmission wheel to ensure smooth linear transmission; the microscope 6 is used to capture the precise position of the tip of the probe card; the microscope 6 supports a 5-cm moving stroke in the Z direction, and through this stroke, it is easy to achieve up and down focusing to ensure that the tip of the probe card is clearly visible; at the same time, the microscope 6 is equipped with a support base, and the support base is connected to the slide rail in the X direction to achieve smooth sliding of the microscope 6 in the X direction, facilitating finding the target tip position; in order to ensure clear imaging of the tip under different light conditions, the microscope 6 is equipped with a cold light source 7, and the brightness of the cold light source 7 can be adjusted according to actual needs to ensure the best quality of the tip image.
[0036] In a preferred embodiment, the X-axis rocker 31 or the Y-axis rocker 32 is connected to a screw drive system. When the X-axis rocker 31 or the Y-axis rocker 32 rotates, it drives the screw connected to it to rotate; the X-axis rocker 31 or the Y-axis rocker 32 is connected to the screw through a gear or a coupling; when the X-axis rocker 31 or the Y-axis rocker 32 rotates, the screw generates a linear displacement under the guidance of its thread; the screw is fixedly connected to the moving base 2 through a nut assembly, and the nut assembly is rigidly connected to the moving base 2 to ensure that the linear movement of the screw is directly transmitted to the moving base 2 to control its precise movement in the X-axis direction; stroke limiters can be provided at both ends of the screw to prevent the moving base 2 from exceeding the stroke range, further improving the safety and reliability of the device.
[0037] In a preferred embodiment, the control mechanism 5 is connected to the transfer base 4 through a circuit to control the movement operation of the base; the control mechanism 5 can drive the transfer base 4 according to the detection requirements of the probe card, thereby driving the moving base 2 to achieve full-automatic detection of the needle tip; during the detection process, the imager 8 performs real-time processing on the needle tip position image captured by the microscope 6, and the image signal is transmitted to the processing unit of the control mechanism 5 to automatically identify the specific position of each needle tip; in this way, the position of each needle tip of the probe card can be detected quickly and efficiently; after the detection is completed, the system will automatically generate a needle tip position report, including detailed data on whether the needle tip is correctly positioned, and any unqualified needle tip positions will be marked for the operator to further repair.
[0038] Embodiment 2:
[0039] In this embodiment, compared with Embodiment 1, Embodiment 2 adds an angle adjustment knob 41 and a speed adjustment knob 42 to meet more complex detection requirements.
[0040] In this embodiment, an angle adjustment knob 41 is provided on the transfer base 4 to adjust the level of the probe card; when different models or sizes of probe cards need to be detected, the horizontal state of the probe card may be affected. The angle adjustment knob 41 can flexibly adjust the inclination angle of the transfer base 4 to ensure that the probe card is always in the correct horizontal state, effectively avoiding needle tip positioning errors caused by horizontal deviation, and improving the detection accuracy.
[0041] In a preferred embodiment, the angle adjustment knob 41 precisely adjusts the inclination angle of the transfer base 4 through a screw drive mechanism; specifically, the angle adjustment knob 41 is connected to a rotating screw, and one end of the screw is threadedly connected to the transfer base 4; when the angle adjustment knob 41 is rotated, the screw will move along the direction of the thread, converting the rotation into a linear motion, driving the change of the inclination angle of the transfer base 4; both ends of the screw are fixed on a support frame to ensure that it does not displace during rotation, ensuring the smoothness and high precision of the adjustment, and controlling the angle change of the transfer base 4 within the micron range to meet the horizontal adjustment requirements of different types of probe cards.
[0042] To meet the speed requirements in different operation scenarios, this embodiment adds a speed adjustment knob 42 to the transfer base 4; the speed adjustment knob 42 is connected to the control mechanism 5, and the operator can adjust the moving speed of the transfer base 4 according to the complexity of the detection task; for example, in detection tasks that require higher precision, the moving speed can be reduced to ensure the precise positioning of each needle tip; while in routine detection, a higher moving speed can improve the detection efficiency.
[0043] In a preferred embodiment, the control mechanism 5 is further connected with an imager 8, which accurately captures the position of each needle tip through a microscope 6, forms a probe card needle tip image through the imager 8, and automatically generates a detailed inspection report; the inspection report will contain the inspection data of all needle tip positions, and any needle tip that fails the inspection will be marked red by the system for the operator to check and adjust.
[0044] The PCB board needle tip position detection device in the above-mentioned embodiment of this specification is not only applicable to the detection of common cantilever needles, but also compatible with various types of probe cards such as vertical needles; through flexible angle adjustment and moving speed control, the device can adapt to various probe cards with different structures, and is widely used in the detection before and after the repair of probe cards. The support for multiple types of probe cards greatly expands the applicable range of the device, enabling it to play a role in various industrial environments.
[0045] In addition, as Figure 2 shown, the PCB board needle tip position detection device in this embodiment replaces the traditional step of detecting needle marks on the machine in step S4, reducing unnecessary links in the maintenance process; and at the same time supports the detection of the needle tip positions of both cantilever needles and vertical needles. Whether it is the detection before and after the repair of the probe card, it can be automatically completed by this device; through the angle adjustment and speed adjustment functions, the operator can flexibly control the device according to different test requirements, further improving the detection efficiency and detection accuracy.
[0046] The above is only the specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any changes or substitutions that can be easily thought of by those skilled in the art within the technical scope disclosed by the present invention should be covered by the protection scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the claims.
Claims
1. An automatic detection device for the tip position of a PCB board, characterized in that, Comprising: A conveying mechanism, the conveying mechanism includes parallel guide rails, a moving base, a rocker and a conveying base which are sequentially connected from top to bottom. The parallel guide rails are arranged on the moving base along the Y direction for placing the PCB board; the rocker is arranged on the side of the moving base, and the rocker controls the movement of the moving base; the moving base is movably connected to the conveying base through a motor pulley; A microscope for capturing the tip position of the PCB board; A control mechanism, the control mechanism is electrically connected to the conveying base for driving the conveying base; The microscope is electrically connected to the control mechanism.
2. The automatic detection device for the tip position of the PCB board according to claim 1, wherein A number of positioning holes are provided on the parallel guide rails for fixing the PCB board.
3. The automatic PCB board tip position detection device according to claim 1, characterized in that, The rocker includes an X-axis rocker and a Y-axis rocker, and the movement of the moving base in the X direction and the Y direction is controlled by the X-axis rocker and the Y-axis rocker.
4. The automatic detection device for the tip position of the PCB board according to claim 1, characterized in that, An angle adjustment knob is provided on the conveying base, and the angle adjustment knob is used to adjust the inclination angle of the conveying base so as to adjust the levelness of the PCB board.
5. The automatic detection device for the tip position of the PCB board according to claim 4, characterized in that, A speed adjustment knob is provided on the conveying base, and the speed adjustment knob is connected to the control mechanism for controlling the moving speed of the conveying base.
6. The automatic detection device for the tip position of the PCB board according to claim 1, characterized in that, It further includes a cold light source, and the microscope is connected to the cold light source to achieve brightness adjustment.
7. The automatic detection device for the tip position of the PCB board according to claim 6, characterized in that, A support base is connected to the microscope in the Z direction, and a slide rail is connected to the support base in the X direction, and the microscope slides in the X direction through the slide rail.
8. The automatic PCB board tip position detection device according to claim 6, characterized in that, The microscope is fixed in the X and Y directions, and the microscope has a Z-axis travel of 5 cm in the Z direction by itself.
9. The automatic detection device for the tip position of the PCB board according to any one of claims 1-8, characterized in that, It further includes an imager, and the imager is electrically connected to the control mechanism.