Circuit board traceability method and manufacturing method with traceability identification code

Abstract

This invention discloses a method for tracing and manufacturing a circuit board with a traceability identification code. The circuit board with the traceability identification code includes a substrate and a traceability identification code. The traceability identification code is located on the surface of the substrate near the edge to prevent obstruction of the circuit layer. The traceability identification code consists of nine identification patterns arranged linearly. Each identification pattern is composed of multiple identification holes arranged in predetermined positions. Each identification hole is a through-hole penetrating the substrate. The identification patterns are sequentially set as a starting pattern, a model schematic pattern, an external version schematic pattern, and an internal version schematic pattern. The starting pattern is one identification pattern, which is a geometric shape composed of identification holes. The model schematic pattern is composed of six identification patterns, which are all numerical shapes composed of identification holes. The external version schematic pattern is a letter shape composed of identification holes. The internal version pattern is a numerical shape composed of identification holes.

Description

[0001] This application is a divisional application of the application filed on April 6, 2023, with application number 202310365415.8 and titled "Circuit Board with Traceability Identification Code and Traceability Method and Manufacturing Method Thereof". Technical Field

[0002] This invention relates to the field of PCB circuit board technology, and in particular to a method for tracing the origin of circuit boards with traceability identification codes and a manufacturing method thereof. Background Technology

[0003] Printed Circuit Boards (PCBs) are widely used in various electronic products and are crucial electronic connectors. The quality of the PCB directly impacts the overall quality of the electronic product. To better control product quality, it's necessary to record relevant production information for traceability, facilitating end-to-end traceability and quality control. One common technique is to set traceability identification codes on the PCB for easy tracking. These codes are typically created using laser engraving or mechanical drilling, and then read by a machine for traceability. However, the overall production cost of QR codes is relatively high, and specialized machines are required for processing them, further increasing production costs. Summary of the Invention

[0004] This invention aims to at least solve one of the technical problems existing in the prior art. To this end, this invention proposes a circuit board traceability method and manufacturing method with traceability identification codes, which can obtain the identification codes for traceability through drilling, without the need for additional equipment, simplifying the manufacturing of traceability codes and the traceability method, thereby reducing production costs and meeting traceability requirements.

[0005] A circuit board with a traceability identification code according to a first aspect embodiment of the present invention includes a substrate and a traceability identification code. The substrate has one or both sides of a circuit layer. The traceability identification code is disposed on the substrate, and the traceability identification code is located near the edge of the substrate surface to prevent obstruction of the circuit layer. The traceability identification code consists of nine identification patterns arranged linearly. Each identification pattern is composed of multiple identification holes arranged in predetermined positions. The identification holes are through holes penetrating the substrate. The identification patterns are sequentially configured as a starting pattern, a model schematic pattern, an external version schematic pattern, and an internal version schematic pattern. The starting pattern is one identification pattern, which is a geometric shape composed of the identification holes. The model schematic pattern is composed of six identification patterns, which are all numerical shapes composed of the identification holes. The external version schematic pattern is a letter shape composed of the identification holes. The internal version pattern is a numerical shape composed of the identification holes.

[0006] The circuit board with a traceability identification code according to the first aspect of the present invention has at least the following advantages: the processing of the identification pattern can be completed by drilling equipment, and the manufacturing of PCB circuit boards itself requires drilling equipment for drilling. Processing the traceability identification code during the drilling process replaces traditional traceability identification code processing such as laser engraving, eliminating the need for additional laser engraving equipment and thus indirectly reducing production costs. Furthermore, drilling is simple and convenient, has high processing efficiency, and does not require the use of chemicals, thus avoiding additional pollution. The traceability identification code consists of nine identification patterns, which are identified sequentially during traceability: The first initial graphic consists of a geometric shape formed by multiple identification holes, used to indicate the start of this coding process; the second to seventh identification graphics are model diagrams, composed of identification holes forming numerical shapes, used to represent a 6-digit model number to define different model versions of the circuit board. It should be noted that the numerical shapes include 0-9; the eighth identification graphic is an external version diagram, composed of identification holes forming letter shapes, used to indicate the version number of external data.

[0007] According to a second aspect of the present invention, a circuit board traceability method is applied to the aforementioned circuit board with a traceability identification code, comprising a substrate and a traceability identification code, wherein the substrate has one or both sides of a circuit layer. The traceability identification code is disposed on the substrate, located near the edge of the substrate surface to prevent obstruction of the circuit layer. The traceability identification code consists of nine identification patterns arranged linearly, each pattern being composed of multiple identification holes arranged in predetermined positions. Each identification hole is a through-hole penetrating the substrate. The identification patterns are sequentially configured as a starting pattern, a model schematic pattern, an external version schematic pattern, and an internal version schematic pattern. The starting pattern is one identification pattern, which is a geometric shape composed of the identification holes. The model schematic pattern consists of six identification patterns, each composed of a number shape composed of the identification holes. The external version schematic pattern is a letter shape composed of the identification holes. The internal version pattern is a number shape composed of the identification holes. The circuit board traceability method includes the following steps: Provide the circuit board with the traceability identification code and obtain the traceability identification code; Detect the initial graphic and begin reading the source identification code; Detect the schematic diagram of the model number and obtain the numerical model information; Detect the external version diagram to obtain the version number of the internal data; The internal version diagram is examined to obtain the internal data version number.

[0008] The circuit board traceability method according to a second aspect embodiment of the present invention has at least the following beneficial effects: The first starting graphic is a geometric shape composed of multiple identification holes, used to indicate the start of this coding process; the second to seventh identification graphics are model schematic graphics, composed of identification holes forming numerical shapes, used to represent a 6-digit model number to define different model versions of the circuit board. It should be noted that the numerical shapes include 0-9; the eighth identification graphic is an external version schematic graphic, composed of identification holes forming letter shapes, used to indicate the external data version number. It should be noted that the letter shapes include A, B, and C; the ninth identification graphic is an internal version schematic graphic, composed of identification holes forming numerical shapes, and the numerical shapes include 0-9, used to indicate the internal data version number. It is understood that the traceability identification code proposed by the present invention allows users to directly visually determine the corresponding traceability information, replacing QR codes, eliminating the need for additional equipment to read traceability information, simplifying and facilitating the traceability process, and further reducing traceability costs. On the other hand, traceability information can also be obtained through devices such as LDI cameras or light-transmitting sensors using traceability identification codes, controlling the cost of traceability equipment while further improving the efficiency of reading traceability information. The unique encoding method that replaces QR codes helps reduce additional costs incurred in the traceability process, improves traceability efficiency, and ensures traceability accuracy, thereby effectively ensuring the product quality of circuit boards.

[0009] According to some embodiments of the second aspect of the present invention, the traceability identification code is visually inspected and traceability information is obtained.

[0010] According to some embodiments of the second aspect of the present invention, the traceability identification code is detected by an LDI camera and traceability information is obtained.

[0011] According to some embodiments of the second aspect of the present invention, the traceability table is identified and traceability information is obtained by means of a light source and a photosensitive device.

[0012] According to a third aspect of the present invention, a method for manufacturing a circuit board, applied to a circuit board with a traceability identification code, includes a substrate and a traceability identification code. The substrate has one or two circuit layers. The traceability identification code is disposed on the substrate, located near the edge of the substrate surface to prevent obstruction of the circuit layers. The traceability identification code consists of nine identification patterns arranged linearly. Each identification pattern is composed of multiple identification holes arranged in predetermined positions. Each identification hole is a through-hole penetrating the substrate. The identification patterns are sequentially configured as a starting pattern, a model schematic pattern, an external version schematic pattern, and an internal version schematic pattern. The starting pattern is one identification pattern, which is a geometric shape composed of the identification holes. The model schematic pattern consists of six identification patterns, all of which are numerical shapes composed of the identification holes. The external version schematic pattern is a letter shape composed of the identification holes. The internal version pattern is a numerical shape composed of the identification holes. The method for manufacturing the circuit board with the traceability identification code includes the following steps: The substrate is provided, and the circuit layer is formed on one or both sides of the substrate; Holes are drilled within the circuit units of the substrate to serve as soldering holes for circuit elements; A hole is drilled near the edge of the substrate to obtain the identification hole, thereby obtaining the traceability identification code; The substrate is subjected to copper plating, electroplating, and circuit pretreatment in sequence. Apply a dry film to the substrate; The traceability identification code information is obtained to obtain the model and version number of the circuit board, and then the circuit board is exposed.

[0013] The method for manufacturing a circuit board according to a third aspect embodiment of the present invention has at least the following beneficial effects: Additional aspects and advantages of the invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. Attached Figure Description

[0014] The present invention will be further described below with reference to the accompanying drawings and embodiments, wherein: Figure 1 This is a schematic diagram of a traceability identification code according to a first aspect embodiment of the present invention; Figure 2 This is a schematic diagram of a circuit board with a traceability identification code according to a first aspect embodiment of the present invention; Figure 3 This is a flowchart illustrating the circuit board traceability method according to a second aspect of the present invention. Figure 4This is a schematic flowchart illustrating a method for manufacturing a circuit board according to a third aspect of the present invention.

[0015] Reference numerals: substrate 100; circuit layer 110; traceability identification code 200; identification hole 201; starting graphic 210; model schematic 220; external version schematic 230; internal version schematic 240. Detailed Implementation

[0016] Embodiments of the present invention are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and should not be construed as limiting the present invention.

[0017] In the description of this invention, it should be understood that the orientation descriptions, such as up, down, front, back, left, right, etc., are based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limiting this invention.

[0018] In the description of this invention, "several" means one or more, "more than" means two or more, "greater than," "less than," and "exceeding" are understood to exclude the stated number, while "above," "below," and "within" are understood to include the stated number. The use of "first" and "second" in the description is merely for distinguishing technical features and should not be construed as indicating or implying relative importance, or implicitly indicating the number of indicated technical features, or implicitly indicating the order of the indicated technical features.

[0019] In the description of this invention, unless otherwise explicitly defined, terms such as "setting," "installing," and "connecting" should be interpreted broadly, and those skilled in the art can reasonably determine the specific meaning of the above terms in this invention in conjunction with the specific content of the technical solution.

[0020] Printed Circuit Boards (PCBs) are widely used in various electronic products and are crucial electronic connectors. The quality of the PCB directly impacts the overall quality of the electronic product. To better control product quality, it's necessary to record relevant production information for traceability, facilitating end-to-end traceability and quality control. One common technique is to set traceability identification codes on the PCB for easy tracking. These codes are typically created using laser engraving or mechanical drilling, and then read by a machine for traceability. However, the overall production cost of QR codes is relatively high, and specialized machines are required for processing them, further increasing production costs.

[0021] Therefore, referring to Figure 1 and Figure 2 This invention provides a circuit board with a traceability identification code 200, including a substrate 100 and a traceability identification code 200. The substrate 100 has one or both sides of a circuit layer 110. The traceability identification code 200 is disposed on the substrate 100, and is located near the edge of the surface of the substrate 100 to prevent obstruction of the circuit layer 110. The traceability identification code 200 consists of nine identification patterns arranged linearly. Each identification pattern is composed of multiple identification holes 201 arranged in predetermined positions. The identification holes 201 are through holes penetrating the substrate 100. The identification patterns are sequentially set as follows: a starting pattern 210, a model schematic pattern 220, an external version schematic pattern 230, an internal version schematic pattern 240, a model schematic pattern, an external version schematic pattern, and an internal version schematic pattern. The version schematic diagram comprises a single identification graphic, consisting of a starting graphic 210, a model schematic diagram 220, an external version schematic diagram 230, and an internal version schematic diagram 240. The starting graphic 210, model schematic diagram 220, external version schematic diagram 230, and internal version schematic diagram 240 are geometric shapes composed of identification holes 201. The model schematic diagram consists of six identification graphics, all of which are numerical shapes formed by identification holes 201. The external version schematic diagram is a letter shape formed by identification holes 201, and the internal version schematic diagram is a numerical shape formed by identification holes 201. Preferably, the diameter of the identification hole 201 is 0.5 mm.

[0022] Understandably, the processing of identification patterns can be completed using drilling equipment, and PCB circuit board manufacturing itself requires drilling. Processing the traceability identification code 200 during the drilling process replaces traditional laser engraving methods, eliminating the need for additional laser engraving equipment and thus indirectly reducing production costs. Furthermore, drilling is a simple and convenient operation with high efficiency, requiring no chemicals and causing no additional pollution. The traceability identification code 200 consists of nine identification patterns, which are identified sequentially during traceability: The first initial graphic 210, model schematic 220, external version schematic 230, and internal version schematic 240 are geometrically formed by multiple identification holes 201, used to indicate the start of this coding process; the second to seventh identification graphics are model schematic graphics, which are numerical shapes formed by identification holes 201, used to represent a 6-digit model number to define different model versions of the circuit board. It should be noted that the numerical shapes include 0-9; the eighth identification graphic is an external version schematic graphic, which is a letter shape formed by identification holes 201, used to indicate the version number of external data.

[0023] Optionally, the traceability identification code 200 also includes nine identification frames, arranged adjacently, with each identification graphic placed within one frame. Preferably, the identification frames are rectangular, 4.048 mm long and 3.962 mm wide, and multiple frames are connected to form a long strip. It is understood that the identification frames are not specific structures on the substrate 100, but rather serve as auxiliary tools placed at corresponding positions on the substrate 100 during drilling. This helps workers or reading equipment accurately and quickly locate the traceability identification code 200, improving traceability efficiency. Furthermore, the identification frames also facilitate positioning during drilling of the traceability identification code 200, optimizing production.

[0024] Reference Figure 3 The second aspect of the present invention provides a method for tracing the origin of a circuit board, applied to a circuit board having a traceability identification code 200 as described above, comprising the following steps: S110: Provide a circuit board with traceability identification code 200 and obtain traceability identification code 200; S120: Detect the starting graphic 210, model schematic graphic 220, external version schematic graphic 230, and internal version schematic graphic 240, and start reading the traceability identification code 200; S130: Detect the model diagram and obtain the digital model information; S140: Detect the external version diagram and obtain the version number of the internal data; S150: Detect the internal version diagram and obtain the version number of the internal data.

[0025] It is understood that the first starting graphic 210, the model schematic graphic 220, the external version schematic graphic 230, and the internal version schematic graphic 240 are geometrically formed by multiple identification holes 201, used to indicate the start of this encoding; the second to seventh identification graphics are model schematic graphics, composed of identification holes 201 forming numerical shapes, used to represent a 6-digit model number to define different model versions of the circuit board. It should be noted that the numerical shapes include 0-9; the eighth identification graphic is an external version schematic graphic, composed of identification holes 201 forming letter shapes, used to indicate the version number of external data. It should be noted that the letter shapes include A, B, and C; the ninth identification graphic is an internal version schematic graphic, composed of identification holes 201 forming numerical shapes, and the numerical shapes include 0-9, used to indicate the version number of internal data. It is understood that the traceability identification code 200 proposed in this invention allows users to directly visually determine the corresponding traceability information, replacing QR codes, eliminating the need for additional equipment to read traceability information, making the traceability method simple and convenient, and further reducing traceability costs. On the other hand, traceability information from the traceability identification code 200 can also be obtained through devices such as LDI cameras or light-transmitting sensors, controlling the cost of traceability equipment while further improving the efficiency of reading traceability information. The unique encoding method that replaces QR codes helps reduce additional costs incurred in the traceability process, improves traceability efficiency, and ensures traceability accuracy, thereby effectively ensuring the product quality of circuit boards.

[0026] In some embodiments, workers can visually inspect the traceability identification code 200 and obtain traceability information. Compared to QR codes, which require additional QR code reading equipment, this intuitive approach optimizes the traceability method and reduces traceability costs.

[0027] In some embodiments, the traceability identification code 200 is detected by an LDI camera to obtain traceability information. The camera can directly read the information of a single identification graphic, and after data entry, the model and version of the circuit board can be obtained directly, further improving traceability efficiency and simplifying the traceability method.

[0028] In some embodiments, the traceability table identification pattern is acquired and traceability information is obtained through a light source and a photosensitive device. It is understood that the light source can be a light-emitting board, and the identification pattern consists of a through-hole 201 through which light can pass. The light is captured by the photosensitive device, and then analyzed to obtain the coded information on the identification pattern, further determining the circuit board model and version. This optimizes the traceability method, and the method is simple in structure and low in cost.

[0029] Reference Figure 4 The third aspect of the present invention provides a method for manufacturing a circuit board, applied to a circuit board having a traceability identification code 200 as described above, comprising the following steps: S210: Provide a substrate 100, and form a circuit layer 110 on one or both sides of the substrate 100; S220: Drill holes in the circuit unit of the substrate 100 to serve as soldering holes for circuit elements; S230: Drill holes in the portion of the substrate 100 near the edge to obtain identification holes 201, thereby obtaining traceability identification codes 200; S240: The substrate 100 is sequentially subjected to copper plating, electroplating and circuit pretreatment. S250: Apply dry film to substrate 100; S260: Obtain the traceability identification code 200 information to obtain the circuit board model and version number, and then expose the circuit board.

[0030] It's understandable that the processing of the identification pattern can be completed using drilling equipment. PCB manufacturing itself requires drilling, and the drilled holes are used for subsequent soldering of circuit components. Processing the traceability identification code 200 during the drilling process replaces traditional laser engraving methods, eliminating the need for additional laser engraving equipment and thus indirectly reducing production costs. Furthermore, drilling is simple, convenient, and efficient, requiring no chemicals and causing no additional pollution. After applying the dry film, reading the traceability identification code 200 directly reveals the PCB's model and version number, leading to an image of its circuit layers. This facilitates subsequent exposure processing, optimizing the overall PCB manufacturing process and improving efficiency.

[0031] The embodiments of the present invention have been described in detail above with reference to the accompanying drawings. However, the present invention is not limited to the above embodiments. Within the scope of knowledge possessed by those skilled in the art, various changes can be made without departing from the spirit of the present invention.

Claims

1. A method for tracing the origin of a circuit board with a traceability identification code, applied to the tracing of a circuit board with a traceability identification code, wherein the circuit board with the traceability identification code includes a substrate and a traceability identification code, and the substrate has one or two circuit layers. A traceability identification code is disposed on the substrate. The traceability identification code is located near the edge of the substrate surface to prevent obstruction of the circuit layer. The traceability identification code consists of nine identification patterns arranged linearly. Each identification pattern is composed of multiple identification holes arranged in predetermined positions. Each identification hole is a through-hole penetrating the substrate. The identification patterns are sequentially set as a starting pattern, a model schematic pattern, an external version schematic pattern, and an internal version schematic pattern. The starting pattern is one identification pattern, which is a geometric shape formed by the identification holes. The model schematic pattern consists of six identification patterns, which are all numerical shapes formed by the identification holes. The external version schematic pattern is a letter shape formed by the identification holes. The internal version pattern is a numerical shape formed by the identification holes. The traceability method for the circuit board includes the following steps: Provide the circuit board with the traceability identification code and obtain the traceability identification code; Detect the initial graphic and begin reading the traceability identification code; Detect the schematic diagram of the model number and obtain the numerical model information; Detect the external version diagram to obtain the version number of the internal data; The internal version diagram is examined to obtain the internal data version number.

2. The circuit board traceability method with traceability identification code according to claim 2, characterized in that, The traceability identification code is visually inspected to obtain traceability information.

3. The circuit board traceability method with traceability identification code according to claim 2, characterized in that, The traceability identification code is detected by an LDI camera to obtain traceability information.

4. The circuit board traceability method with traceability identification code according to claim 2, characterized in that, The traceability table is identified and traceability information is obtained by using a light source and a photosensitive device.

5. A method for manufacturing a circuit board with a traceability identification code, applied to the manufacturing of the circuit board with the traceability identification code, wherein the circuit board with the traceability identification code includes a substrate and a traceability identification code, and the substrate has one or two circuit layers. A traceability identification code is disposed on the substrate. The traceability identification code is located near the edge of the substrate surface to prevent obstruction of the circuit layer. The traceability identification code consists of nine identification patterns arranged linearly. Each identification pattern is composed of multiple identification holes arranged in predetermined positions. Each identification hole is a through-hole penetrating the substrate. The identification patterns are sequentially set as a start pattern, a model schematic pattern, an external version schematic pattern, and an internal version schematic pattern. The start pattern is one identification pattern, which is a geometric shape composed of the identification holes. The model schematic pattern consists of six identification patterns, which are all numerical shapes composed of the identification holes. The external version schematic pattern is a letter shape composed of the identification holes. The internal version pattern is a numerical shape composed of the identification holes. The manufacturing method of the circuit board with the traceability identification code includes the following steps: The substrate is provided, and the circuit layer is formed on one or both sides of the substrate; Holes are drilled within the circuit units of the substrate to serve as soldering holes for circuit elements; A hole is drilled near the edge of the substrate to obtain the identification hole, thereby obtaining the traceability identification code; The substrate is subjected to copper plating, electroplating, and circuit pretreatment in sequence. Apply a dry film to the substrate; The traceability identification code information is obtained to obtain the model and version number of the circuit board, and then the circuit board is exposed.

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