Two-dimensional code structure

Abstract

The utility model relates to the technical field of two-dimensional codes, and discloses a two-dimensional code structure, which comprises an ink layer arranged on a PCB (printed circuit board), the ink layer is formed by coating solder mask ink, the surface of the ink layer is a two-dimensional code area, and laser is aligned with the two-dimensional code area for engraving, so that the thickness of a part of the ink layer is reduced, and the color of the part of the ink layer is changed to form a two-dimensional code. The utility model provides a two-dimensional code structure capable of reducing the engraving offset rate.

Description

Technical Field

[0001] The utility model relates to the technical field of two-dimensional codes, and in particular to a two-dimensional code structure. Background Art

[0002] At present, in order to permanently and fully track the production and use of PCB boards, manufacturers often mark the surface of PCB boards with QR codes, barcodes, production batch numbers, etc. This is an energy-saving, environmentally friendly and efficient process. Before the PCB products are completed, the quality control and inspection procedures will record each PCB and separate the unqualified products before distribution to achieve product traceability.

[0003] Most of the methods of engraving QR codes on PCB boards on the market are to print a layer of white ink block on the QR code area, and then print a layer of black ink on top of the white ink block, and then use laser engraving to etch away part of the surface black ink to expose the white ink underneath to form a QR code. However, during laser engraving, the etched area needs to be aligned with the bottom white ink area, which is prone to engraving offset, resulting in an incomplete QR code, which can easily lead to product scrapping and increase product costs. Therefore, it is necessary to provide a QR code structure that can avoid the above problems. Utility Model Content

[0004] The utility model aims to provide a two-dimensional code structure, so as to provide a two-dimensional code structure with reduced engraving deviation rate.

[0005] To achieve the above-mentioned purpose, the utility model adopts the following technical scheme: a two-dimensional code structure, including an ink layer arranged on a PCB board, the ink layer is coated with a solder-resistant ink, the surface of the ink layer is a two-dimensional code area, and a laser is aimed at the two-dimensional code area for engraving so that the thickness of part of the ink layer is reduced and the color changes to form a two-dimensional code.

[0006] The beneficial effects of this program are:

[0007] The traditional method is to cover the white ink with a layer of black ink and then perform laser engraving. At this time, the laser engraving position needs to be aligned with the white ink, but there is often an error in the alignment of the white ink covered under the black ink, so the engraving offset problem often occurs, which makes it difficult to scan the QR code, and then causes the PCB board to need to be reprocessed. Compared with the traditional ink printing method, the solder mask ink coating structure of this technical solution is simpler. Only a layer of black solder mask ink needs to be applied. When aligning, only the laser engraving area needs to be aligned with the surface ink. The laser engraving process is more precise and the processing requirements are reduced. At the same time, the process of applying white ink is reduced, which can reduce production costs and improve production efficiency.

[0008] The surface of the laser engraved ink layer, the engraved part is burned by the laser to form an oxide layer, which causes the burned part to change color, which is different from the original color and can form a two-dimensional code pattern. The two-dimensional code pattern in the present technical solution can be obtained using only one layer of ink. The use of solder-resistant ink as the basic material makes the formed two-dimensional code more durable and stable, and it is not easy to be scratched during transportation, resulting in damage to the surface of the two-dimensional code, thereby improving the reliability of the product. At the same time, the size of the laser-made two-dimensional code area can be increased. Through the above method, the two-dimensional code can be set at any position of the PCB board, and a larger two-dimensional code can be printed without damaging the PCB board. The two-dimensional code directly engraved on the board is generally small in area and not easy to scan.

[0009] Preferably, as an improvement, the ink layer is black.

[0010] The beneficial effects are: the ink layer is set to black, and the contrast between the discolored area and the black area after laser printing is high, providing obvious contrast, which helps to ensure that the QR code is easier to read when scanning; black ink is more stable under different environmental conditions than other colors, and is not easily affected by light or other factors. Color change; black is usually more resistant to sunlight and oxidation, and can provide better durability, ensuring that the QR code remains clear and readable during the product life cycle.

[0011] Preferably, as an improvement, the thickness of the ink layer is in the range of 35-55 μm.

[0012] The beneficial effects are: within this thickness range, the ink layer is thin enough to ensure that the details of the QR code are clearly visible, and thick enough to provide sufficient contrast, making the QR code easier to read when scanning; the appropriate ink layer thickness can provide stability during laser engraving, helping to ensure the accuracy and consistency of the QR code, too thin an ink layer may cause instability during the laser engraving process, while too thick an ink layer may affect the clarity of the details.

[0013] Preferably, as an improvement, the thickness of the portion of the ink layer where the thickness is reduced is engraved to a range of 10-25 μm.

[0014] The beneficial effect is that the color rendering of the discolored part can be guaranteed. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a schematic diagram of an embodiment of the utility model. DETAILED DESCRIPTION

[0016] The following is further described in detail through specific implementation methods:

[0017] The reference numerals in the drawings of the specification include: ink layer 1, QR code area 2, PCB board 3, and exposed copper area 4.

[0018] Example

[0019] The embodiment is basically as follows Figure 1 As shown, Figure 1 A two-dimensional code structure shown includes an ink layer 1 provided on a PCB board 3 and a copper exposed area 4 next to the ink layer 1. The ink layer 1 is coated with solder mask ink, and the surface of the ink layer 1 is a two-dimensional code area 2. The laser is aligned with the two-dimensional code area 2 to engrave so that the thickness of part of the ink layer 1 is reduced and the color changes to form a two-dimensional code. The surface of the laser engraved ink layer 1 is burned by the laser to form an oxide layer, which causes the burned part to change color, which is different from the original color and can form a two-dimensional code pattern. The two-dimensional code pattern in the technical solution can be obtained using only one layer of ink. The solder mask ink is used as the basic material, so that the two-dimensional code is more durable and stable, and it is not easy to be scratched during transportation to cause damage to the surface of the two-dimensional code, which improves the reliability of the product. At the same time, the size of the laser-made two-dimensional code area can be increased. In the above method, a two-dimensional code can be set at any position of the PCB board 3, and a larger two-dimensional code can be printed without damaging the PCB board 3. The two-dimensional code directly engraved on the PCB board 3 is generally small in area and difficult to scan.

[0020] The ink layer 1 of this embodiment is black. The ink layer 1 is set to black, and the contrast between the discolored area and the black area after laser printing is high, providing obvious contrast, which helps to ensure that the two-dimensional code is easier to read when scanning; black ink is more stable under different environmental conditions than other colors, and is not easy to change color due to light or other factors; black is generally more resistant to sunlight and oxidation, and can provide better durability, ensuring that the two-dimensional code remains clear and readable during the product life cycle.

[0021] The thickness of the ink layer 1 ranges from 35 to 55 μm; the thickness of the reduced ink layer 1 that is engraved ranges from 10 to 25 μm. Within this thickness range, the ink layer 1 is thin enough to ensure that the details of the QR code are clearly visible, and thick enough to provide sufficient contrast, making the QR code easier to read when scanning; the appropriate thickness of the ink layer 1 can provide stability during laser engraving, helping to ensure the accuracy and consistency of the QR code. Too thin an ink layer 1 may cause instability during laser engraving, while too thick an ink layer 1 may affect the clarity of details.

[0022] The specific implementation process is as follows:

[0023] The traditional method is to cover the white ink with a black ink layer 1, and then perform laser engraving. At this time, the laser engraving position needs to be aligned with the white ink, but there is often an error in the alignment of the white ink covered under the black ink, so the engraving offset problem often occurs, which makes it difficult to scan the QR code, and then causes the PCB board 3 to need to be reprocessed. Compared with the traditional ink printing method, the solder mask ink coating structure of the technical solution is simpler. Only a layer of black solder mask ink needs to be applied. When aligning, only the laser engraving area needs to be aligned with the surface ink. The laser engraving process is more precise and the processing requirements are reduced. At the same time, the process of applying white ink is reduced, which can reduce production costs and improve production efficiency.

[0024] The above is only an embodiment of the utility model, and the common knowledge such as the known specific technical solutions and / or characteristics in the solution is not described in detail here. It should be pointed out that for those skilled in the art, without departing from the technical solution of the utility model, several deformations and improvements can be made, which should also be regarded as the protection scope of the utility model, and these will not affect the effect of the implementation of the utility model and the practicality of the patent. The scope of protection required by this application shall be based on the content of its claims, and the specific implementation methods and other records in the specification can be used to interpret the content of the claims.

Claims

1. A two-dimensional code structure, characterized in that: It includes an ink layer arranged on a PCB board, the ink layer is coated with solder-resistant ink, the surface of the ink layer is a QR code area, and a laser is aimed at the QR code area for engraving so that the thickness of a part of the ink layer is reduced and the color changes to form a QR code; the thickness range of the ink layer is 35-55μm; the thickness range of the part of the ink layer where the thickness is reduced is 10-25μm.

2. A two-dimensional code structure according to claim 1, characterized in that: The ink layer is black.

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