PCB drilling depth detection device

Abstract

The utility model provides a PCB (Printed Circuit Board) drilling depth detection device, which relates to the technical field of PCB manufacturing and comprises a transparent substrate and a buffer aluminum sheet, the transparent substrate is square, and the thickness of the transparent substrate is greater than or equal to 3.5 mm; the buffer aluminum sheet covers the transparent substrate; scale marks and / or color marks are arranged on the transparent substrate; the transparent substrate is further provided with a fixing structure used for being fixed to drilling equipment. The scale marks are arranged on the side face of the transparent substrate, and the division value of the scale marks is 0.05 mm; the color marks are different color layers prefabricated in the transparent substrate, and the different color layers correspond to different depth values. Rapid, simple, convenient and visual detection of the drilling depth of the PCB is realized. Compared with a traditional method, complex measuring steps and additional tools are not needed, and an operator can directly observe the marks on the transparent substrate through naked eyes to rapidly judge whether the drilling depth meets the requirement or not. The method is especially suitable for production scenes where whether the drilling depth is qualified needs to be rapidly judged.

Description

Technical Field

[0001] This utility model relates to the field of PCB manufacturing technology, and in particular to a PCB drilling depth detection device. Background Technology

[0002] Drilling is a crucial step in the manufacturing process of printed circuit boards (PCBs). Especially in the production of high-speed, high-density PCBs, precise control of drilling depth is paramount. Back-drilling technology is often used to control the length of stubs in multilayer PCBs to reduce signal reflection and loss. However, accurately measuring drilling depth has always been a challenge.

[0003] Traditional methods for measuring borehole depth mainly include using depth gauges and observing with a section microscope.

[0004] While using a depth gauge is convenient, its limited accuracy, the presence of debris inside the hole, and the operator's skill level can all lead to errors in the measurement results, as the probe may not reach the bottom of the stub. These errors are particularly pronounced when the borehole diameter is small and the depth is deep.

[0005] The method of observing PCB samples under a microscope requires cutting and polishing the samples before observation and measurement. Although it has high precision, the process is cumbersome, time-consuming, and costly, and it can damage the samples, making it unsuitable for online testing. In addition, the sample preparation process itself may introduce errors.

[0006] Both methods have their limitations and are difficult to meet the efficiency and accuracy requirements of modern PCB manufacturing for drilling depth detection.

[0007] Therefore, existing PCB drilling depth measurement technology needs to be improved to overcome its shortcomings. Utility Model Content

[0008] To overcome the problems of low measurement accuracy, cumbersome operation, high cost, and inability to conduct online detection in related technologies, the purpose of this utility model is to provide a PCB drilling depth detection device. This device uses a transparent substrate and sets scale marks and / or color marks on it for intuitive display of drilling depth, thereby overcoming the problems of low measurement accuracy of depth gauges, cumbersome and time-consuming observation by section microscope, high cost and sample damage, and inability to conduct online detection in existing technologies.

[0009] A PCB drilling depth detection device, comprising:

[0010] A transparent substrate, wherein the transparent substrate is square and has a thickness of 3.5 mm or more;

[0011] A buffer aluminum sheet is used to cover the transparent substrate;

[0012] The transparent substrate is provided with scale markings and / or color markings;

[0013] The transparent substrate is also provided with a fixing structure for fixing to the drilling equipment;

[0014] The scale markings are provided on the side of the transparent substrate, and the scale markings have a graduation value of 0.05 mm;

[0015] The color markings are different color layers pre-formed inside the transparent substrate, and different color layers correspond to different depth values.

[0016] The combination of a transparent substrate and scale markings and / or color markings allows the drilling depth to be displayed intuitively, enabling rapid determination of drilling depth without the need for other measuring tools, significantly improving detection efficiency and reducing operational difficulty.

[0017] The use of graduated markings enables precise measurement of borehole depth, providing quantified depth information, improving detection accuracy, and making the results more reliable. Setting the graduation value to 0.05mm meets the detection requirements of high-precision boreholes, such as depth control for small-diameter holes like back drills, further enhancing detection accuracy.

[0018] By using different color layers prefabricated inside a transparent substrate, the drilling depth can be displayed intuitively by color, making the inspection process simpler and faster.

[0019] With a transparent substrate thickness of 3.5 mm or more, it can meet the inspection needs of deeper drilling, expand the application range of the device, improve the stability of the device, and is not easily deformed.

[0020] The buffer aluminum sheet can extend the service life of the device and provide a smoother drilling surface, improving measurement accuracy.

[0021] The device is secured to the drilling equipment by a fixed structure, which can stably fix the device to the drilling equipment, avoiding displacement and deviation during the testing process and ensuring the accuracy and reliability of the measurement results.

[0022] Furthermore, the transparent substrate can be made of materials such as acrylic (PMMA), polycarbonate (PC), polysulfone (PSU), polyethersulfone (PES), cyclic olefin copolymer (COC), or polymethylpentene (PMP / TPX).

[0023] Furthermore, the transparent substrate is an acrylic sheet.

[0024] Acrylic sheets are used as transparent substrates because they have good light transmittance, are easy to process and stable, are inexpensive and easy to mass-produce.

[0025] Furthermore, the scale markings are provided on all four sides of the transparent substrate.

[0026] Scale marks are set on all four sides of the transparent substrate to facilitate observation and reading of the drilling depth from different angles, which improves the convenience and flexibility of measurement and reduces operational errors.

[0027] Furthermore, the transparent substrate is composed of a sequence of color layers of different colors stacked together.

[0028] Furthermore, the transparent substrate is composed of multiple transparent layers stacked together, with the color layer coated between adjacent transparent layers.

[0029] Furthermore, the thickness of the buffer aluminum sheet is 0.1 mm to 0.3 mm.

[0030] The thickness range is limited to 0.1mm to 0.3mm, which balances buffering effect and measurement accuracy.

[0031] Furthermore, the transparent substrate has a length of 50mm to 100mm and a width of 50mm to 100mm.

[0032] The wide range of sizes available for this transparent substrate makes it more suitable for practical applications of PCB drilling inspection, facilitating operation and placement while also meeting the needs of PCBs of different sizes.

[0033] Furthermore, the fixing structure is a threaded hole or a slot.

[0034] The beneficial effects of this utility model are as follows:

[0035] This invention provides a PCB drilling depth detection device, comprising a transparent substrate and a buffer aluminum sheet covering the transparent substrate. The transparent substrate has scale markings and / or color markings, with different color layers pre-fabricated inside the transparent substrate, each corresponding to a different depth value. This enables rapid, simple, and intuitive detection of PCB drilling depth. Compared to traditional depth gauges or section microscopes, this device eliminates the need for complex measurement steps and additional tools. Operators can directly observe the scale markings and / or color markings on the transparent substrate to quickly determine if the drilling depth meets requirements. The scale markings and / or color markings significantly simplify the detection process, improve efficiency, and reduce the skill requirements of operators. It also avoids problems such as measurement errors, sample damage, and high equipment costs associated with traditional methods. This makes it particularly suitable for production scenarios requiring rapid assessment of drilling depth, such as back drilling and other processes with strict depth control. Furthermore, this intuitive display method allows operators to adjust drilling parameters promptly, further improving production efficiency and product quality. Attached Figure Description

[0036] Figure 1 This is a side view of the PCB drilling depth detection device provided in Embodiment 1 of this application;

[0037] Figure 2 This is a perspective view of the PCB drilling depth detection device provided in Embodiment 1 of this application;

[0038] Figure 3 This is a schematic diagram of the measurement results of the PCB drilling depth detection device provided in Embodiment 1 of this application;

[0039] Figure 4 This is a schematic diagram of the operation of the PCB drilling depth detection device provided in Embodiment 1 of this application;

[0040] Figure 5 This is a schematic diagram of the PCB drilling depth detection device provided in Embodiment 2 of this application;

[0041] Figure 6 This is a schematic diagram of the fixing structure of the PCB drilling depth detection device provided in Embodiment 3 of this application;

[0042] Figure 7 This is a schematic diagram of the PCB drilling depth detection device provided in Embodiment 4 of this application.

[0043] Figure label:

[0044] 100. Transparent substrate; 110. Scale markings; 120. Color layer; 130. Fixing structure; 200. Buffer aluminum sheet; 300. Drilling. Detailed Implementation

[0045] Preferred embodiments of the present invention will now be described in more detail with reference to the accompanying drawings. While preferred embodiments of the present invention are shown in the drawings, it should be understood that the present invention may be implemented in various forms and should not be limited to the embodiments set forth herein. Rather, these embodiments are provided so that the present invention will be thorough and complete, and will fully convey the scope of the present invention to those skilled in the art.

[0046] Example 1

[0047] like Figures 1 to 7 As shown, this embodiment provides a PCB drilling depth detection device, such as... Figure 1 , Figure 2 As shown, the PCB drilling depth detection device includes:

[0048] A transparent substrate 100 is provided with graduated markings for visually displaying the drilling depth. The graduation value of the graduated markings 110 is 0.05 mm.

[0049] In this embodiment, the transparent substrate 100 is a square acrylic sheet. The thickness of the transparent substrate 100 is 3.5 mm. The length of the transparent substrate 100 is 50 mm, and the width is 50 mm.

[0050] It also includes a buffer aluminum sheet 200 for covering the transparent substrate 100.

[0051] The transparent substrate is provided with a fixing structure for fixing to the drilling equipment. In this embodiment, the fixing structure is a threaded hole that is bolted to the drilling equipment.

[0052] More specifically, in this embodiment, the scale markings 110 are provided on all four sides of the transparent substrate 100.

[0053] More specifically, in this embodiment, the thickness of the buffer aluminum sheet 200 is 0.2 mm. The buffer aluminum sheet can be made of ordinary aluminum sheet, coated aluminum sheet, lubricated aluminum sheet, film-coated aluminum sheet, etc., or other commonly used cover plate materials in the industry.

[0054] like Figure 4 As shown, in use, the device is placed on the drilling equipment, the drilling depth is set to the controlled depth plus 0.2mm of aluminum sheet thickness, and then the drilling operation is performed. Figure 3As shown, after drilling is completed, the drilling depth value can be directly read through the scale markings. To further verify the drilling depth, the transparent substrate 100 can also be sliced ​​for confirmation. The drilled transparent substrate 100 is cut along the center line of the drill hole, and then the slice is polished so that the actual drilling depth can be observed and measured under a microscope. This step is not required for every drilling inspection and is mainly used for device calibration or more precise depth analysis.

[0055] The PCB drilling depth detection device provided in this embodiment uses a transparent acrylic substrate 100 with fine 0.05mm scale markings 110 engraved on its four sides. Combined with a 0.2mm thick buffer aluminum sheet 200, it can achieve rapid, accurate, and intuitive measurement of PCB drilling depth. The device has a simple structure, low cost, and is easy to operate, making it particularly suitable for applications with moderate drilling depth accuracy requirements, such as conventional through-hole drilling inspection. Furthermore, the slicing confirmation step can further verify the accuracy of the measurement results and perform more precise depth analysis, making it suitable for applications with higher accuracy requirements.

[0056] Example 2

[0057] like Figures 1 to 7 As shown, this embodiment provides a PCB drilling depth detection device, such as... Figure 5 As shown, the PCB drilling depth detection device includes:

[0058] A transparent substrate 100 is provided with color markings for visually displaying the drilling depth. The color markings are different color layers 120 pre-formed inside the transparent substrate 100, and different color layers 120 correspond to different depth values.

[0059] In this embodiment, the transparent substrate 100 is made of polycarbonate. The thickness of the transparent substrate 100 is 4 mm. The length and width of the transparent substrate 100 are 80 mm. The transparent substrate has threaded holes at its corners for fixing to a drilling device.

[0060] Specifically, in this embodiment, the transparent substrate 100 is formed by stacking and pressing five different colored transparent material sequences, each layer having a thickness of 0.1 mm. From top to bottom, the colors are red, yellow, green, blue, and purple. A total of six layers of this transparent material sequence form a transparent polycarbonate substrate.

[0061] More specifically, each color corresponds to a depth value. For example, one layer of red represents 0.1mm, two layers of red represent 0.6mm, one layer of yellow represents 0.2mm, two layers of yellow represent 0.7mm, and so on.

[0062] In use, the device is placed on a drilling machine, and a 0.3mm thick aluminum sheet is placed on the transparent substrate 100. The drilling depth is set to the controlled depth plus the 0.3mm thickness of the aluminum sheet, and drilling is performed. After drilling is completed, the drilling depth can be directly determined by observing the color displayed at the bottom of the hole and the number of times the color repeats.

[0063] The PCB drilling depth detection device provided in this embodiment uses polycarbonate material as the transparent substrate 100, and is formed by stacking and pressing different colored transparent materials in sequence, with each color corresponding to a different depth value. This design makes the judgment of drilling depth more intuitive and convenient; the depth range can be quickly determined simply by observing the color. Polycarbonate material has excellent impact resistance and heat resistance, making the device more robust and durable, suitable for applications requiring high device durability.

[0064] Example 3

[0065] like Figures 1 to 7 As shown, this embodiment provides a PCB drilling depth detection device, such as... Figure 6 As shown, the PCB drilling depth detection device includes:

[0066] A transparent substrate 100 is provided with scale marks and color marks for visually displaying the drilling depth. The scale marks 110 have a graduation value of 0.05 mm. The color marks are different color layers 120 pre-formed inside the transparent substrate 100, and different color layers 120 correspond to different depth values.

[0067] In this embodiment, the transparent substrate 100 is a cyclic olefin copolymer material. The thickness of the transparent substrate 100 is 5 mm. The length of the transparent substrate 100 is 70 mm, and the width is 70 mm.

[0068] More specifically, in this embodiment, the scale markings 110 are provided on all four sides of the transparent substrate 100.

[0069] In this embodiment, the transparent substrate 100 is provided with a fixing structure 130 for fixing to the drilling equipment.

[0070] More specifically, in this embodiment, the fixing structure 130 is a limiting notch provided at the bottom corner of the transparent substrate 100.

[0071] In use, a 0.15mm thick aluminum sheet is placed over the transparent substrate 100 and secured with tape. The device is then fixed to the drilling equipment via a limiting notch. The drilling depth is set to the controlled depth plus the 0.15mm aluminum sheet thickness, and drilling is performed. After drilling is complete, the drilling depth can be directly read by observing the scale mark 110 on the acrylic substrate.

[0072] The PCB drilling depth detection device provided in this embodiment uses a cyclic olefin copolymer material as a transparent substrate 100, with 0.05mm scale marks 110 engraved on its four sides. It is also equipped with limiting notches for connection to drilling equipment. These limiting notches securely fix the device to the drilling equipment, avoiding displacement and errors during the measurement process, significantly improving the stability and accuracy of the measurement, making it particularly suitable for applications requiring high drilling depth accuracy. Furthermore, the cyclic olefin copolymer material possesses excellent dimensional stability and optical properties, ensuring the reliability of the measurement.

[0073] Example 4

[0074] like Figures 1 to 7 As shown, this embodiment provides a PCB drilling depth detection device, such as... Figure 7 As shown, the PCB drilling depth detection device includes:

[0075] A transparent substrate 100 is provided with scale marks and color marks for visually displaying the drilling depth. The scale marks 110 have a graduation value of 0.05 mm. The color marks are different color layers 120 pre-formed inside the transparent substrate 100, and different color layers 120 correspond to different depth values.

[0076] In this embodiment, the transparent substrate 100 is made of resin material. The thickness of the transparent substrate 100 is 4 mm. The length of the transparent substrate 100 is 100 mm, and the width is 100 mm.

[0077] Specifically, in this embodiment, the transparent substrate 100 is composed of 30 transparent resin layers, each 0.1 mm thick, and a color layer 120 is coated between adjacent transparent resin layers.

[0078] Furthermore, adjacent color layers 120 have different colors.

[0079] In use, a 0.1mm thick aluminum sheet is placed over the acrylic substrate. The device is then placed on a drilling machine, and the drilling depth is set to the control depth plus the 0.1mm aluminum sheet thickness. After drilling is complete, the drilling depth can be directly read by observing the change in the scale mark 110 on the acrylic substrate.

[0080] The device provided in this embodiment is composed of multiple layers of transparent resin, and the drilling depth is indicated by coating different colored layers 120 between adjacent resin layers. It is relatively low in cost, easy to manufacture, and can clearly display the drilling depth for easy observation and reading.

[0081] Unless otherwise specifically stated, the relative arrangement, numerical expressions, and values ​​of the components and steps set forth in these embodiments do not limit the scope of this application. Any specific values ​​in all examples shown and discussed herein should be interpreted as merely exemplary and not as limitations. Therefore, other examples of exemplary embodiments may have different values. It should be noted that similar reference numerals and letters in the following figures denote similar items; therefore, once an item is defined in one figure, it need not be further discussed in subsequent figures.

[0082] Furthermore, it should be noted that the use of terms such as "first" and "second" is merely for ease of distinction, and unless otherwise stated, these terms have no special meaning and therefore should not be construed as limiting the scope of protection of this application.

[0083] The above description is merely a preferred embodiment of this utility model and is not intended to limit the utility model. Various modifications and variations can be made to this utility model by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this utility model should be included within the protection scope of this utility model.

Claims

1. A PCB drilling depth detection device, characterized in that, include: A transparent substrate (100) is square and has a thickness of 3.5 mm or more; A buffer aluminum sheet (200) is placed on the transparent substrate (100); The transparent substrate (100) is provided with scale marks and / or color marks; The transparent substrate (100) is also provided with a fixing structure (130) for fixing to the drilling equipment; The scale mark (110) is provided on the side of the transparent substrate (100), and the scale mark (110) has a graduation value of 0.05 mm; The color markings are different color layers (120) prefabricated inside the transparent substrate (100), and different color layers (120) correspond to different depth values.

2. The PCB drilling depth detection device according to claim 1, characterized in that: The transparent substrate (100) is an acrylic sheet.

3. The PCB drilling depth detection device according to claim 1, characterized in that: The scale markings (110) are provided on all four sides of the transparent substrate (100).

4. The PCB drilling depth detection device according to claim 1, characterized in that: The transparent substrate (100) is formed by stacking color layers (120) of different colors.

5. The PCB drilling depth detection device according to claim 1, characterized in that: The transparent substrate (100) is composed of multiple transparent layers stacked together, and the color layer (120) is coated between adjacent transparent layers.

6. The PCB drilling depth detection device according to claim 1, characterized in that: The thickness of the buffer aluminum sheet (200) is 0.1 mm to 0.3 mm.

7. The PCB drilling depth detection device according to claim 1, characterized in that: The transparent substrate (100) has a length of 50 mm to 100 mm and a width of 50 mm to 100 mm.

8. The PCB drilling depth detection device according to claim 1, characterized in that: The fixing structure (130) is located at the bottom of the transparent substrate (100), and the fixing structure (130) is a threaded hole or a slot.

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