Flexible circuit board with regular conductor diameter and its production process

Abstract

The present invention provides a flexible circuit board with a conventional diameter of a conductor and a production process thereof, which belongs to the technical field of flexible circuit board production. The production process of the flexible circuit board with a conventional diameter of a conductor is suitable for coils, and the steps are as follows: S10, making three different screens, and sequentially installing them in equipment for graphic printing, insulation printing, and bridge printing; S20, sequentially performing graphic printing, etching, insulation printing, and bridge printing on the coil to be processed, processing a plurality of positioning points along its own extension direction on the coil to be processed, the distance between two adjacent positioning points being the single movement stroke of the coil to be processed, and the coil to be processed between the two adjacent positioning points forming a layout; during the printing process, the screen prints each layout and moves with the offset of the coil to be processed; S30, quality inspection; S40, cutting into small rolls and packaging. The present invention improves the qualified rate of finished flexible circuit boards.

Description

Technical Field

[0001] The invention belongs to the technical field of flexible circuit board production, and in particular relates to a flexible circuit board with a conventional conductor diameter and a production process thereof. Background Art

[0002] Flexible circuit boards, also known as "soft boards", are printed circuits made of flexible insulating substrates. They can be bent, wound, and folded freely. They can withstand millions of dynamic bendings without damaging the wires. They can be arranged arbitrarily according to spatial layout requirements and can be moved and stretched arbitrarily in three-dimensional space, thereby achieving the integration of component assembly and wire connection.

[0003] When printing flexible circuit boards, if the deviation between the distances the coil advances each time is too large, or if the coil deviates left and right during the forward movement, the coil will not be aligned with the screen, causing deviations in the printed image, resulting in a low qualified rate of finished flexible circuit boards. Summary of the invention

[0004] The embodiment of the present invention provides a flexible circuit board with a regular conductor diameter and a production process thereof, aiming to solve the technical problem of improving the qualified rate of finished flexible circuit boards.

[0005] In a first aspect, the present invention provides a production process for a flexible circuit board with a conventional conductor diameter, which is suitable for coiling, and the steps are as follows:

[0006] S10, making three different screens and installing them in the equipment for graphic printing, insulation printing and bridge printing in sequence;

[0007] S20, feeding the coil to be processed into the graphic printing device, the etching device, the insulation printing device, and the bridge printing device in sequence, and performing graphic printing, etching, insulation printing, and bridge printing on the coil to be processed in sequence, processing a plurality of positioning points on the coil to be processed along its own extension direction, the distance between two adjacent positioning points being a single movement stroke of the coil to be processed, and the coil to be processed between two adjacent positioning points forming a layout;

[0008] During the printing process, the screen prints each of the layouts and moves along with the offset of the coil to be processed until the printing of all the layouts on the coil to be processed is completed to form a finished coil;

[0009] S30, performing quality inspection on the finished coil;

[0010] S40, cutting the finished coiled material that has passed the quality inspection into small coils and packing them.

[0011] In combination with the first aspect, in a possible implementation, in the step S20, the positioning point is processed by a stamping device located in front of a graphic printing device, and a monitoring unit is further provided between the graphic printing device and the etching device, and the monitoring unit is used to monitor the positioning point;

[0012] When the monitoring unit detects the positioning point, the graphic printing device and the stamping device are started simultaneously.

[0013] In combination with the first aspect, in a possible implementation, when the punching device punches the positioning point, it simultaneously punches out a number at the positioning point, and the number is a count of the corresponding layout one by one;

[0014] The monitoring unit further includes a recording unit, which is used to photograph and record the number.

[0015] In combination with the first aspect, in a possible implementation, in the step S20, a scraper is used to flatten the ink on the screen and take away excess ink when printing the graphic, and the hardness of the scraper for printing the graphic is 75-85 Shore hardness.

[0016] In combination with the first aspect, in a possible implementation, in the step S20, an insulating layer is printed on the plate in the insulating printing step, the insulating layer has a thickness of 20-30 μm, and the scraper hardness of the insulating printing is 60-70 Shore hardness.

[0017] In combination with the first aspect, in a possible implementation, in the step S20, in the bridge printing step, a bridge layer is printed on the plate, the thickness of the bridge layer is 10-20 μm, and the scraper hardness of the bridge printing is 60-70 Shore hardness.

[0018] In combination with the first aspect, in a possible implementation, in the step S20, the graphic printing equipment, the insulation printing equipment and the bridge printing equipment are all provided with a temperature control system, the temperature control system includes a temperature sensor and an adjustment unit communicatively connected to the temperature sensor, the temperature sensor monitors in real time the temperature data of the screen corresponding to the graphic printing, the insulation printing and the bridge printing, the adjustment unit has a heating part and a cooling part, and the adjustment unit adjusts in real time the temperature of the screen corresponding to the graphic printing, the insulation printing equipment and the bridge printing equipment according to the temperature data.

[0019] In combination with the first aspect, in a possible implementation, the coil to be processed is preheated by the heating unit before the graphic printing, the insulation printing and the bridge printing;

[0020] After the graphic printing, the insulation printing and the bridge printing are completed, the finished coil material is subjected to a constant temperature treatment by the heating unit or the finished coil material is subjected to a gradual temperature reduction treatment by the cooling unit.

[0021] In combination with the first aspect, in a possible implementation manner, the temperature control system further includes an alarm communicatively connected to the temperature sensor;

[0022] When the temperature sensor detects that the temperature exceeds a preset value, the alarm starts to sound.

[0023] Compared with the prior art, the production process of the flexible circuit board with regular conductor diameter provided by the present invention has the following advantages:

[0024] By monitoring the positioning points on the coil to control the forward distance of the coil, the deviation between each forward distance is reduced, so that each layout has a precise front and back position; at the same time, the screen position can be moved to compensate for the offset of the coil position, so that each layout has a precise left and right position. Therefore, each layout is accurately positioned in four directions, front, back, left and right, which improves the qualified rate of finished flexible circuit boards.

[0025] In a second aspect, the present invention further provides a flexible circuit board with a regular conductor diameter, and a flexible circuit board made by a production process of a flexible circuit board with a regular conductor diameter. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 A flowchart showing a flexible circuit board production process is provided for an embodiment of the present invention;

[0027] Figure 2 Provided for the embodiment of the present invention is a schematic structural diagram of a finished flexible circuit board. DETAILED DESCRIPTION

[0028] In order to make the technical problems, technical solutions and beneficial effects to be solved by the present invention more clearly understood, the present invention is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not intended to limit the present invention.

[0029] If necessary, briefly describe the existing technical structure or professional terms used, the existing technical problems, the root causes of the problems, and the principles or concepts of this application to solve the above technical problems.

[0030] See also Figure 1, the production process of the flexible circuit board with a regular diameter of the conductor of the present invention is described. A production process of a flexible circuit board with a regular diameter of the conductor, suitable for coils, the steps are as follows: S10, make three different screens, and install them in the equipment for graphic printing, insulation printing, and bridge printing in sequence; S20, send the coil to be processed into the graphic printing equipment, etching equipment, insulation printing equipment, and bridge printing equipment in sequence, and perform graphic printing, etching, insulation printing, and bridge printing on the coil to be processed in sequence, and process multiple positioning points along the extension direction of the coil to be processed, the distance between two adjacent positioning points is the single movement stroke of the coil to be processed, and the coil to be processed between two adjacent positioning points forms a layout; during the printing process, the screen prints each layout and moves with the offset of the coil to be processed until the printing of all layouts on the coil to be processed is completed to form a finished coil; S30, perform quality inspection on the finished coil; S40, cut the finished coil that passes the quality inspection into small rolls and pack them.

[0031] Compared with the prior art, the production process of the flexible circuit board with a normal conductor diameter provided in this embodiment is as follows:

[0032] By monitoring the positioning points on the coil to control the forward distance of the coil, the deviation between each forward distance is reduced, so that each layout has a precise front and back position; at the same time, the screen position can be moved to compensate for the offset of the coil position, so that each layout has a precise left and right position. Therefore, each layout is accurately positioned in four directions, front, back, left and right, which improves the qualified rate of finished flexible circuit boards.

[0033] In some embodiments, in step S20, the positioning point is processed by a stamping device located in front of the graphic printing device, and a monitoring unit is also provided between the graphic printing device and the etching device, and the monitoring unit is used to monitor the positioning point; when the monitoring unit detects the positioning point, the graphic printing device and the stamping device are started at the same time.

[0034] In some embodiments, when the stamping equipment stamps the positioning point, it stamps out the number at the positioning point synchronously, and the number is a count of the corresponding layout one by one; the monitoring unit also includes a recording unit, which is used to photograph and record the number.

[0035] A unique number is added to each positioning point, which not only allows positioning, but also records additional layout information, such as production batch and material type.

[0036] In some embodiments, in step S20, a scraper is used to scrape the ink on the screen and remove excess ink during graphic printing, and the hardness of the scraper for graphic printing is 75-85 Shore hardness.

[0037] In some embodiments, in step S20, an insulating layer is formed on the plate by printing in the insulating printing step, the thickness of the insulating layer is 20-30 μm, and the hardness of the scraper for insulating printing is 60-70 Shore hardness.

[0038] In some embodiments, in step S20, a bridge layer is formed on the plate in the bridge printing step, the thickness of the bridge layer is 10-20 μm, and the hardness of the scraper for bridge printing is 60-70 Shore hardness.

[0039] The scraper hardness is too high. The scraper hardness is too high, which may cause uneven ink scraping, resulting in color difference, uneven line thickness or dot deformation in the printed image. These problems will directly affect the visual quality and electrical performance of the flexible circuit board. If the scraper hardness is too low, the ink may not be subjected to enough pressure during the scraping process, resulting in excessive ink fluidity and difficulty in precise control, which may cause problems such as ink overflow, blur or unclear printing edges on the printed product.

[0040] If the insulation layer is too thick, the thermal resistance will increase, and the heat generated during operation will be difficult to dissipate, which may cause the temperature to rise and affect the stability and service life; the increase in the thickness of the insulation layer means that more insulating materials are needed, which will increase the production cost and weight; although the main function of the insulation layer is to provide electrical isolation, an overly thick insulation layer will increase the capacitance effect and affect the electrical performance.

[0041] If the insulation layer is not thick enough, it cannot provide sufficient electrical isolation, which may easily cause electrical faults such as leakage or short circuit. If the insulation layer is too thin, it will reduce the voltage resistance and easily cause breakdown in high-voltage environment, thus causing electrical fires or electric shock accidents. If the insulation layer is too thin, it may be more susceptible to erosion by environmental factors (such as oxygen, moisture, chemicals, etc.), resulting in a rapid decline in insulation performance and shortened service life.

[0042] A bridge layer that is too thick will increase thermal resistance and affect heat dissipation performance, especially in high-power applications, which may cause temperature rise and affect stability and service life; a bridge layer that is too thick means that more materials are needed, thereby increasing production costs and weight; a bridge layer that is too thick may increase the capacitance effect and affect the electrical performance of the circuit board, especially in high-frequency circuits, which may cause signal delays or attenuation.

[0043] A bridge layer that is too thin has low strength and is easily deformed or damaged when subjected to external force; a bridge layer that is too thin is easily corroded by environmental factors, such as chemical substances, which accelerates the aging process and shortens its lifespan.

[0044] In some embodiments, in step S20, the graphic printing equipment, the insulation printing equipment and the bridge printing equipment are all provided with a temperature control system, the temperature control system includes a temperature sensor and an adjustment unit communicatively connected to the temperature sensor, the temperature sensor monitors the temperature data of the corresponding screens in the graphic printing, insulation printing and bridge printing in real time, the adjustment unit has a heating part and a cooling part, the adjustment unit adjusts the temperature of the corresponding screens in the graphic printing, insulation printing equipment and bridge printing equipment in real time according to the temperature data.

[0045] After the temperature sensor transmits the temperature data to the adjustment unit, the adjustment unit compares the temperature data with the preset temperature. If it is found that the temperature data deviates from the preset temperature, the adjustment unit will automatically adjust the temperature to ensure that printing is carried out within the optimal temperature range and improve printing quality.

[0046] It should be noted that the heating part heats up and the cooling part cools down gradually and continuously to ensure a smooth temperature transition and avoid interference with the production process.

[0047] In some embodiments, the coil to be processed is preheated by a heating unit before graphic printing, insulation printing and bridge printing; after graphic printing, insulation printing and bridge printing are completed, the finished coil is kept at a constant temperature by the heating unit or gradually cooled by the cooling unit.

[0048] Preheating treatment allows the coil to reach a suitable processing temperature, improving the plasticity and processing performance of the material; after production is completed, constant temperature or gradual cooling is performed to ensure product quality and stability.

[0049] In some embodiments, the temperature control system further includes an alarm communicatively connected to the temperature sensor.

[0050] Among them, when the temperature sensor detects that the temperature exceeds the preset value, the alarm starts to sound.

[0051] When abnormal temperature is detected, the alarm will promptly send out an alarm signal to remind operators to take corresponding measures, which will help avoid production accidents caused by temperature problems and ensure production safety.

[0052] In some embodiments, in step S30, the quality inspection includes appearance, circuit open and short circuit, gap and electrical performance inspection. The quality inspection can be completed manually or with the help of AOI equipment.

[0053] It should be noted that products with no defects in appearance, no open or short circuits, a gap rate below 50%, and good or above electrical performance are qualified, and the rest are unqualified.

[0054] In some embodiments, the quality inspection further includes wiping impurities on the surface of the finished product with a cotton swab dipped in alcohol to reduce the impact of the impurities on the performance of the finished product.

[0055] See also Figure 2 Based on the same inventive concept, an embodiment of the present application also provides a flexible circuit board with a regular diameter of a conductor, and the flexible circuit board is manufactured using the above-mentioned production process.

[0056] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A production process for a flexible circuit board with a regular conductor diameter, characterized in that: For coiled material, the steps are as follows: S10, making three different screens and installing them in the equipment for graphic printing, insulation printing and bridge printing in sequence; S20, feeding the coil to be processed into the graphic printing device, the etching device, the insulation printing device, and the bridge printing device in turn, and performing graphic printing, etching, insulation printing and bridge printing on the coil to be processed in turn, processing a plurality of positioning points on the coil to be processed along its own extension direction, the distance between two adjacent positioning points is the single movement stroke of the coil to be processed, and the coil to be processed between two adjacent positioning points forms a layout; in the step S20, the graphic printing device, the insulation printing device and the bridge printing device are all provided with a temperature control system, and the temperature control system includes a temperature sensor and a communication link with the temperature sensor The temperature sensor monitors the temperature data of the screen corresponding to the graphic printing, the insulation printing and the bridge printing in real time. The regulating unit has a heating part and a cooling part. The regulating unit adjusts the temperature of the screen corresponding to the graphic printing, the insulation printing equipment and the bridge printing equipment in real time according to the temperature data; the heating part is used to preheat the coil to be processed before the graphic printing, the insulation printing and the bridge printing; after the graphic printing, the insulation printing and the bridge printing are completed, the heating part is used to keep the finished coil at a constant temperature or the cooling part is used to gradually cool the finished coil During the printing process, the screen prints each of the layouts and moves along with the offset of the coil to be processed until the printing of all the layouts on the coil to be processed is completed to form a finished coil; S30, performing quality inspection on the finished coil; S40, cutting the finished coiled material that has passed the quality inspection into small coils and packing them.

2. The production process of a flexible circuit board with a regular conductor diameter as claimed in claim 1, characterized in that: In the step S20, the positioning point is processed by a stamping device located in front of the graphic printing device, and a monitoring unit is further provided between the graphic printing device and the etching device, and the monitoring unit is used to monitor the positioning point; When the monitoring unit detects the positioning point, the graphic printing device and the stamping device are started simultaneously.

3. The production process of a flexible circuit board with a regular conductor diameter as claimed in claim 2, characterized in that: When the punching device punches the positioning point, a number is punched out at the positioning point synchronously, and the number is a count of the corresponding layout one by one; The monitoring unit further includes a recording unit, which is used to photograph and record the number.

4. The process for producing a flexible circuit board with a regular conductor diameter as claimed in claim 1, characterized in that: In the step S20, a scraper is used to flatten the ink on the screen and take away excess ink during the graphic printing, and the hardness of the scraper for graphic printing is 75-85 Shore hardness.

5. The production process of a flexible circuit board with a regular conductor diameter as claimed in claim 1, characterized in that: In the step S20, an insulating layer is formed by printing on the plate in the insulating printing step. The thickness of the insulating layer is 20-30 μm. The hardness of the scraper used for the insulating printing is 60-70 Shore A hardness.

6. The process for producing a flexible circuit board with a regular conductor diameter as claimed in claim 1, characterized in that: In the step S20, in the bridge printing step, a bridge layer is formed by printing on the plate surface, the thickness of the bridge layer is 10-20 μm, and the hardness of the scraper for bridge printing is 60-70 Shore hardness.

7. The process for producing a flexible circuit board with a regular conductor diameter as claimed in claim 1, characterized in that: The temperature control system also includes an alarm connected to the temperature sensor; When the temperature sensor detects that the temperature exceeds a preset value, the alarm starts to sound.

8. A flexible circuit board with a normal diameter of conductor, characterized in that: A flexible circuit board made using the production process for a flexible circuit board with a regular conductor diameter as described in any one of claims 1 to 7.

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