Quality control methods for copper clad laminate prepreg preparation

Abstract

This invention discloses a quality control method for the preparation of copper-clad laminate prepregs, which includes a production data acquisition step and a data closed-loop processing step. The production data acquisition step includes: q1, horizontal data acquisition, which includes: continuously monitoring the horizontal position of the fiberglass cloth base material relative to the conveying roller during the resin impregnation process to obtain horizontal data; q2, multi-factor interference anomaly quantification parameter acquisition, which includes: placing open containers below the conveying rollers at various positions higher than the resin liquid, and the containers are not directly connected to each other; and measuring the liquid accumulation change in each container and calculating the liquid accumulation change rate as one of the anomaly quantification data. Based on the above analysis, this application can assess whether the fiberglass cloth base material may have warp and weft misalignment during the process and make timely adjustments to reduce the defective prepregs caused by warp and weft misalignment and ensure the preparation quality of copper-clad laminate prepregs.

Description

Technical Field

[0001] This application relates to the field of copper clad laminate production and processing technology, and in particular to a quality control method for the preparation of copper clad laminate prepreg. Background Technology

[0002] Copper-clad laminates are made by covering one or both sides of a prepreg with copper foil and then hot-pressing them. These laminates are then used to manufacture PCB circuit boards.

[0003] Prepreg, also known as PP sheet, is a yellow, sheet-like solid that is produced by impregnating fiberglass cloth with epoxy resin and then heat-treating it into a thin film. The fiberglass cloth is woven from fiberglass and consists of warp and weft yarns.

[0004] Because of the hot pressing process involved in the fabrication of PCB circuit boards using prepreg, and the stress differences caused by different glass fiber warp and weft densities and directions, substandard warp and weft of the prepreg will increase the risk of PCB circuit board deformation and warping.

[0005] For prepreg manufacturers, at the raw material level—glass fiber cloth—the quality of prepregs can be controlled through strict quality control of incoming raw materials. However, during the processing, such as... Figure 1 As shown, it is a process of impregnating fiberglass cloth with resin. During the process, uneven stress causes warp and weft distortion in the finished product after subsequent heat pretreatment, resulting in defective semi-cured sheets that need to be resolved by the manufacturer. Therefore, this application proposes a new technical solution. Summary of the Invention

[0006] To reduce the number of defective prepregs caused by warp and weft misalignment, this application provides a quality control method for the preparation of copper-clad laminate prepregs.

[0007] This application provides a quality control method for the preparation of copper-clad laminate prepregs, which adopts the following technical solution:

[0008] A quality control method for the preparation of copper-clad laminate prepreg includes a production data acquisition step and a data closed-loop processing step;

[0009] The production data collection steps include:

[0010] q1. Horizontal data acquisition, which includes: continuously monitoring the horizontal position of the fiberglass cloth base material relative to the conveying roller during the impregnation of resin solution, and obtaining horizontal data;

[0011] q2. Acquisition of multi-factor interferometric anomaly quantification parameters, including:

[0012] Open containers are placed below the conveying rollers at various positions above the resin liquid, and these containers are not directly connected to each other; and,

[0013] The change in liquid accumulation in each container was measured separately, and the rate of change in liquid accumulation was calculated as one of the abnormal quantitative data.

[0014] The data closed-loop processing steps include:

[0015] The current horizontal data is compared with the horizontal data during the preset standard operation to obtain the horizontal offset data;

[0016] If the horizontal offset data meets the preset conditions for warp and weft skew, a warning message will be issued and / or the axial position of the corresponding conveyor roller will be adjusted.

[0017] If the horizontal offset data does not meet the preset conditions for latitude and longitude skew, proceed to the next step;

[0018] The sampling period is T1.

[0019] The liquid accumulation rate in the current sampling period is compared with the liquid accumulation rate in historical sampling periods to obtain liquid accumulation deviation data.

[0020] When the liquid accumulation deviation data meets the preset conditions for warp and weft misalignment, a second warning message is issued, and the viscosity of the resin solution is checked and adjusted, the liquid level in the resin solution impregnation tank is checked and adjusted, and the rotation speed of the conveyor roller is adjusted.

[0021] Optionally, the horizontal data acquisition includes:

[0022] Images of the fiberglass cloth substrate during the resin impregnation process are captured from a top-down view using a camera.

[0023] Image analysis yields horizontal data.

[0024] Optionally, a first vent hole is provided at the bottom of the container, and the vent hole is connected to a preset intermediate tank through a first pipe. A first vent valve is installed on the first pipe. A temperature control unit and a stirring mechanism are installed in the intermediate tank. A second vent hole is provided at the bottom of the intermediate tank, and the second vent hole is connected to the lower part of the resin impregnation tank through a second pipe. The height of the second vent hole is higher than that of the resin impregnation tank. A second vent valve is installed on the second pipe. An overflow hole is provided at the upper part of the resin impregnation tank.

[0025] The reflux cycle is defined as duration T2.

[0026] The timing is set, and when the end of the current reflux cycle is reached, the first vent valve is opened and the second vent valve is closed, causing the temperature unit and / or the stirring mechanism to operate;

[0027] The temperature unit and / or stirring mechanism stop operating after a duration of T3, and the first relief valve is closed while the second relief valve is opened.

[0028] Optionally, a replenishment hole is provided at the bottom of the resin impregnation tank. The replenishment hole is connected to a preset buffer balance tank through a three-way pipe. The buffer balance tank is filled with resin and the liquid level is higher than the overflow hole on the impregnation tank.

[0029] Optionally, a liquid replenishment valve is installed on the third pipeline;

[0030] When the second relief valve is opened, the replenishment valve is closed; and when the second relief valve is closed, the replenishment valve is opened.

[0031] Optionally, the acquisition of multi-factor interferometric anomaly quantification parameters includes:

[0032] Images of the fiberglass cloth substrate during the resin impregnation process are captured using other cameras in a frontal view.

[0033] Image analysis yielded fiberglass cloth matrix orientation data, which is one type of anomaly quantification data.

[0034] The data closed-loop processing steps include:

[0035] If the horizontal offset data does not meet the preset warp and weft skew conditions, the current fiberglass cloth substrate orientation data is compared with the preset standard operation fiberglass cloth substrate orientation data to obtain the orientation offset data.

[0036] If the directional offset data meets the preset conditions for warp and weft misalignment, a warning message will be issued and / or the conveyor roller rotation will be stopped.

[0037] Optionally, it also includes a verification material intermittent introduction step, the verification material intermittent introduction step including:

[0038] Choose to color the warp and weft yarns separately;

[0039] The colored warp and weft yarns were woven together using the same weaving method as the fiberglass cloth base material to obtain the verification material;

[0040] When the horizontal offset data, liquid accumulation deviation data, or directional offset data meet the preset conditions for warp and weft skew, the original fiberglass cloth base material is cut off, a specified length of verification material is continued, and then fiberglass cloth base material is continued at the end of the verification material.

[0041] Correspondingly, the data closed-loop processing step further includes: using another camera to capture images of the verification material coming out of the resin impregnation tank, and analyzing the images to obtain the latitude and longitude data of the verification material.

[0042] Optionally, before using a camera to capture images of the verification material, the resin residue on the side of the verification material facing the camera can be cleaned with a scraper.

[0043] In summary, this application includes at least one of the following beneficial technical effects: This method can collect the position information of the fiberglass cloth base material relative to the conveying roller, and convert and quantify the changes caused by various factors during the immersion of the fiberglass cloth base material. In this way, it can analyze and evaluate whether the fiberglass cloth base material may have warp and weft misalignment during the process, and make timely adjustments to reduce the defective prepregs caused by warp and weft misalignment and ensure the preparation quality of copper clad laminate prepregs. Attached Figure Description

[0044] Figure 1 This is a structural diagram of existing technology;

[0045] Figure 2 This is a schematic diagram of the structure of this method.

[0046] Explanation of reference numerals in the attached diagram: 1. Container; 2. Camera; 3. Pipe 1; 31. Valve 1; 4. Intermediate tank; 5. Temperature control unit; 6. Stirring mechanism; 7. Installation pipe 2; 71. Valve 2; 8. Pipe 3; 81. Liquid replenishment valve; 9. Balancing tank. Detailed Implementation

[0047] The following is in conjunction with the appendix Figure 2 This application will be described in further detail.

[0048] This application discloses a method for quality control in the preparation of copper-clad laminate prepregs.

[0049] Reference Figure 1 The quality control method for copper-clad laminate prepreg preparation includes production data acquisition steps and data closed-loop processing steps.

[0050] The production data collection steps include:

[0051] q1. Horizontal data acquisition, which includes: continuously monitoring the horizontal position of the fiberglass cloth base material relative to the conveying roller during the impregnation of resin adhesive to obtain horizontal data; in this embodiment, assuming that one end of a certain conveying roller is connected to the drive shaft as the origin and the length direction of the conveying roller is the Y-axis direction, then the change in horizontal data is considered to be the Y-axis value, that is, the amount of sliding of the base material relative to the conveying roller.

[0052] q2. Acquisition of multi-factor interferometric anomaly quantification parameters, including:

[0053] Each container 1 is positioned below a conveying roller that is above the resin solution, with an open top, and the containers 1 are not directly connected to each other; and,

[0054] The change in liquid accumulation in each container 1 was measured separately, and the rate of change in liquid accumulation was calculated as one of the abnormal quantitative data.

[0055] The reason why the rate of change of liquid accumulation is used as one of the abnormal quantitative data is that, as verified, during the process of applying adhesive to the fiberglass cloth base material, assuming that the tension and state of the impregnating resin are the same, theoretically, the amount of excess resin dripping at different positions and at different time periods after impregnation is the same (approximately). However, once a difference in tension occurs, the base material will have differences in stretching and skewing, which will cause the above-mentioned liquid accumulation to change at different times in the same segment.

[0056] It should be noted that q1 and q2 above do not refer to steps, but rather to the first part and the second part, respectively.

[0057] Based on the above, the data closed-loop processing steps include:

[0058] The current horizontal data is compared with the preset horizontal data during standard operation (i.e., the amount of change in the base material relative to the conveyor roller in the Y-axis direction is calculated) to obtain the horizontal offset data;

[0059] If the horizontal offset data meets the preset conditions for warp and weft skew, a warning message will be issued and / or the axial position of the corresponding conveyor roller will be adjusted.

[0060] The first warning message can be a voice / text message indicating "base material displacement and conveying".

[0061] The conditions that cause warp and weft skew include: the change in the Y-axis direction of the boundary contour of the base material on a certain conveying roller is greater than a preset threshold; at this time, the axial position of the corresponding conveying roller is adjusted, and the base material can be moved back to its original position by manual intervention without stopping the machine, thereby reducing the warp and weft skew caused by the imbalance of force on each section of the base material due to skewed transmission.

[0062] An example of how the conveyor roller can move in the Y-axis direction is as follows: An electric cylinder is mounted on a bracket or similar device. The rod end of the electric cylinder is fixed to a plate structure, and a geared motor is mounted on the plate structure. The output shaft of the geared motor is fixed to the conveyor roller via a rotating shaft. When it is necessary to adjust the Y-axis direction of the conveyor roller, the electric cylinder is extended or retracted accordingly.

[0063] The above content is for the following solution: if the Y-axis displacement of the base material is relatively obvious, and there is little displacement in the Y-axis direction or other factors causing interference, that is, if the horizontal offset data does not meet the preset conditions for causing warp and weft skew, then proceed to the next step.

[0064] The sampling period is T1 (e.g., 2 minutes).

[0065] The liquid accumulation rate in the current sampling period is compared with the liquid accumulation rate in historical sampling periods (e.g., the average of the previous 3 periods) to obtain liquid accumulation deviation data.

[0066] When the liquid accumulation deviation data meets the preset conditions for warp and weft skew, the conditions for warp and weft skew include the liquid accumulation deviation data of a certain container 1 being greater than the preset threshold 2, then issuing warning information 2, checking whether the viscosity of the resin adhesive has changed and adjusting it, checking whether the liquid level of the resin adhesive impregnation tank has changed and adjusting it, and adjusting the speed of the conveyor roller.

[0067] The second warning message can be a voice / text message stating "Abnormal liquid accumulation in container 1 (number X)".

[0068] Check if the viscosity of the resin solution has changed and adjust accordingly. Example:

[0069] 1) Set up a funnel with a sealing plate at the bottom and micro-holes in the sealing plate. Divert the resin in the resin impregnation tank through the overflow hole and introduce it into the funnel. Observe the time it takes for a certain amount of resin to flow out of the bottom of the funnel.

[0070] 2) Send the resin liquid from the overflow hole into a liquid storage tank. Erect a straight rod next to the liquid storage tank and set up a cone-shaped structure. The cone-shaped structure is vertically connected to the straight rod by a horizontal rod. Slowly slide the cone-shaped structure from top to bottom and let the tip contact the resin liquid. Then release it, observe and calculate the sinking rate of the cone-shaped structure.

[0071] The above-mentioned check of whether the liquid level in the resin impregnation tank has changed can be achieved by installing a liquid level gauge. Adjusting the speed of the conveyor roller changes the tension of the base material, thereby changing the magnitude and direction of the force on the base material. For example, if the liquid accumulation rate of a certain container 1 is too high, while all others are normal, then the speed of one of the conveyor rollers in front of container 1 is reduced by a preset minimum speed adjustment every t1 time interval. Observe whether the liquid accumulation rate of container 1 recovers. If yes, the process ends; otherwise, the adjustment continues.

[0072] As can be seen from the above, this method can collect the position information of the fiberglass cloth base material relative to the conveying roller, and convert and quantify the changes caused by various factors during the immersion of the fiberglass cloth base material. In this way, it can analyze and evaluate whether the fiberglass cloth base material may have warp and weft misalignment during the process, and make timely adjustments to reduce the defective prepreg caused by warp and weft misalignment, and ensure the preparation quality of copper clad laminate prepreg.

[0073] In one embodiment of this method, to obtain the aforementioned horizontal data, images of the fiberglass cloth substrate during the resin impregnation process are first captured by camera 2 in a top-down view, and then the horizontal data is obtained through image analysis; specifically:

[0074] The image is processed by identifying the features of the base material and conveyor rollers, extracting the contours, calculating the pixel positions, and calculating the contour position dataset based on the pixel positions and a preset scale. Then, the required horizontal data can be extracted.

[0075] The reason why this method uses image analysis to obtain horizontal data is that image analysis is non-contact, and no other force is applied to the substrate during the process, and no other variables are introduced. Its non-contact method, such as acoustic wave detection, has too poor accuracy and does not meet the current scenario, while laser is affected by the adhesive on the substrate and requires a dense array, which has high requirements.

[0076] In one embodiment of this method, the following settings are made:

[0077] A vent hole 1 is provided at the bottom of container 1. A pipe 3 is installed through the vent hole via a connector, and pipe 3 connects to a pre-designated intermediate tank 4. A vent valve 31 is installed on pipe 3. A temperature control unit 5 and a stirring mechanism 6 are installed on the intermediate tank 4. The temperature control unit 5 can be a PTC heating element embedded in the bottom of the tank, and the stirring mechanism 6 can be a stirrer mounted on a bracket above the tank. A second vent hole 2 is provided at the bottom of the intermediate tank 4. The second vent hole 2 is connected to the lower part of the resin impregnation tank via a pipe 7 via a connector. The height of the second vent hole 2 is higher than that of the resin impregnation tank. An overflow hole is provided at the top of the impregnation tank.

[0078] During use, the reflux cycle is defined as the duration T2 (e.g., 10 minutes).

[0079] The timing is set, and when the current reflux cycle ends, the first vent valve 31 is opened and the second vent valve 71 is closed, so that the temperature control unit 5 and / or the stirring mechanism 6 can work. That is, the adhesive is heated according to the ambient temperature and the optimal use temperature of the adhesive, and the adhesive is stirred with the stirrer in a timely manner to prevent it from solidifying over time.

[0080] The temperature control unit 5 and / or the stirring mechanism 6 operate for a duration of T3 before stopping, and the first relief valve 31 is closed while the second relief valve 71 is opened.

[0081] Based on the above settings:

[0082] 1) The adhesive liquid received in container 1 will not be wasted, but will be periodically returned to the resin adhesive impregnation tank for reuse.

[0083] 2) The adhesive can be heated and stirred appropriately before being returned, which can reduce the impact of the returned adhesive state on the adhesive in the resin impregnation tank.

[0084] 3) The stirring of the returned adhesive occurs in the intermediate tank 4 and is carried out in a non-connected state, so it will not cause the adhesive in the resin impregnation tank to vibrate.

[0085] 4) The overflow hole at the top of the resin impregnation tank allows the resin level to be maintained by continuously replenishing the resin impregnation tank, thus reducing the impact of resin-related variables.

[0086] Furthermore, a replenishment hole is opened at the bottom of the resin impregnation tank. The replenishment hole is connected to a preset buffer balance tank 9 through a pipe 3 8. The buffer balance tank 9 is filled with resin and the liquid level is higher than the overflow hole on the impregnation tank.

[0087] Based on the above settings, as long as there is resin liquid in the buffer balance tank 9, the liquid level in the resin impregnation tank can be kept as consistent as possible. Moreover, since the resin liquid is not added directly to the impregnation tank, but replenished by gravity flow through the buffer balance tank 9, the resin liquid in the impregnation tank is more stable.

[0088] Furthermore, to reduce the amount of resin overflowing from the resin impregnation tank and decrease the amount of resin running dry, a replenishing valve 81 is installed on pipe 3 8. When the drain valve 2 71 is opened, the replenishing valve 81 is closed; and when the drain valve 2 71 is closed, the replenishing valve 81 is opened.

[0089] As mentioned above, when the adhesive in the intermediate tank 4 begins to flow back, the replenishment of liquid using the buffer balance tank 9 is stopped. This can prevent excessive replenishment of adhesive in the resin impregnation tank in a short period of time, which would exceed the overflow rate and cause significant rise and fall of the liquid level. At the same time, it can also reduce unnecessary empty flow of adhesive.

[0090] In one embodiment of this method, the acquisition of multi-factor interferometric anomaly quantization parameters includes:

[0091] Images of the fiberglass cloth base material during the resin impregnation process are captured by another camera 2 in a frontal view (i.e., camera 2 is facing the end of the conveyor roller).

[0092] Image analysis yields fiberglass cloth base material orientation data, which is one of the abnormal quantification data. Specifically, identification involves extracting the base material feature contours from the image and importing them into a two-dimensional coordinate system to obtain the set of coordinate points for each segment (between two adjacent conveyor rollers is considered one segment).

[0093] At this point, the data closed-loop processing steps include:

[0094] If the horizontal offset data does not meet the preset conditions for warp and weft skew, the current fiberglass cloth base material orientation data is compared with the preset standard operation fiberglass cloth base material orientation data to obtain the orientation offset data. That is, the current set of coordinate points is compared with the standard set of coordinate points in turn, the individual coordinate difference is calculated, and then the total coordinate difference is calculated.

[0095] If the directional offset data meets the preset conditions for causing latitude and longitude skew, the conditions for causing latitude and longitude skew include the total coordinate difference exceeding the preset threshold, issuing a warning message and / or stopping the rotation of the conveyor rollers.

[0096] Among them, the third warning message can be a voice / text message indicating "abnormal trend of base material".

[0097] It is known that, theoretically, the orientation of the conveyed base material remains unchanged when the positions of each conveyor roller remain constant (X and Z coordinates in a three-dimensional system). However, when the coordinate difference exceeds the preset threshold as described above, the possible reasons are as follows: 1) There is cured glue on the conveyor rollers, and the amount has exceeded the allowable range, resulting in a significant difference in the orientation of the base material; 2) The speed of each conveyor roller and the rate at which the base material is pulled are mismatched and uncoordinated, causing the base material to sag in several sections. Both of these will cause the base material to become skewed due to unbalanced forces. This method, through the above settings, can promptly analyze and assess the risk of skewness in the base material and provide timely warnings and stop the production of substandard prepreg sheets.

[0098] In one embodiment of this method, it further includes: a verification material intermittent introduction step, which includes:

[0099] Choose to color the warp and weft yarns separately;

[0100] The colored warp and weft yarns were woven together using the same weaving method as the fiberglass cloth base material to obtain the verification material;

[0101] When the horizontal offset data, liquid accumulation deviation data, or directional offset data meet the preset conditions for warp and weft skew, the original fiberglass cloth base material is cut off, a specified length of verification material is continued, and then fiberglass cloth base material is continued at the end of the verification material.

[0102] At this point, the data closed-loop processing steps also include: using another camera 2 to capture images of the verification material coming out of the resin impregnation tank, and analyzing the images to obtain the latitude and longitude data of the verification material.

[0103] Understandably, because different colored warp and weft fibers are used for weaving, the warp and weft direction of the verification material is visualized. When the verification material is continued into the base material and glued along the same path, the stress and other factors during the process are similar to those of the base material. By observing the warp and weft direction in its image and comparing it with the original sample, the actual effect after each equipment adjustment can be determined, thus ensuring the implementation effect of this method.

[0104] In another embodiment of this method, before using camera 2 to capture images of the verification material, the resin adhesive on the side of the verification material facing camera 2 is first cleaned with a scraper.

[0105] The method of using the scraper is as follows: fix the scraper with the bracket, the scraper is horizontal and perpendicular to the base material, and the blade of the scraper is close to the side of the base material facing the camera 2.

[0106] The reason for the above settings is to ensure the flatness of the adhesive on the shooting surface, avoid the convex and concave adhesive creating a mirror-like refraction effect that could produce erroneous images, and ensure the accuracy of the verification results.

[0107] The above are all preferred embodiments of this application, and are not intended to limit the scope of protection of this application. Therefore, all equivalent changes made in accordance with the structure, shape and principle of this application should be covered within the scope of protection of this application.

Claims

1. A method for quality control in the preparation of copper-clad laminate prepregs, characterized in that: This includes production data acquisition steps and data closed-loop processing steps; The production data collection steps include: q1. Horizontal data acquisition, which includes: continuously monitoring the horizontal position of the fiberglass cloth base material relative to the conveying roller during the resin impregnation process to obtain horizontal data; q2. Acquisition of multi-factor interferometric anomaly quantification parameters, including: Open containers are placed below the conveying rollers at various positions above the resin liquid, and these containers are not directly connected to each other; and, The change in liquid accumulation in each container was measured separately, and the rate of change in liquid accumulation was calculated as one of the abnormal quantitative data. The data closed-loop processing steps include: The current horizontal data is compared with the horizontal data during the preset standard operation to obtain the horizontal offset data; If the horizontal offset data meets the preset warp and weft skew conditions, a warning message will be issued and / or the axial position of the corresponding conveyor roller will be adjusted. If the horizontal offset data does not meet the preset conditions for latitude and longitude skew, proceed to the next step; The sampling period is T1. The liquid accumulation rate in the current sampling period is compared with the liquid accumulation rate in historical sampling periods to obtain liquid accumulation deviation data. When the liquid accumulation deviation data meets the preset conditions for warp and weft misalignment, a second warning message is issued, and the viscosity of the resin solution is checked and adjusted, the liquid level in the resin solution impregnation tank is checked and adjusted, and the rotation speed of the conveyor roller is adjusted.

2. The quality control method for preparing copper-clad laminate prepreg according to claim 1, characterized in that: The horizontal data acquisition includes: Images of the fiberglass cloth substrate during the resin impregnation process are captured from a top-down view using a camera. Image analysis yields horizontal data.

3. The quality control method for preparing copper-clad laminate prepreg according to claim 1, characterized in that: A first vent hole is provided at the bottom of the container. The vent hole is connected to a predetermined intermediate tank via a first pipe. A first vent valve is installed on the first pipe. A temperature control unit and a stirring mechanism are installed in the intermediate tank. A second vent hole is provided at the bottom of the intermediate tank. The second vent hole is connected to the lower part of the resin impregnation tank via a second pipe. The height of the second vent hole is higher than that of the resin impregnation tank. A second vent valve is installed on the second pipe. An overflow hole is provided at the upper part of the resin impregnation tank. The reflux cycle is defined as duration T2. The timing is set, and when the end of the current reflux cycle is reached, the first vent valve is opened and the second vent valve is closed, causing the temperature unit and / or the stirring mechanism to operate; The temperature unit and / or stirring mechanism operate for a duration of T3 before stopping, and the first relief valve is closed while the second relief valve is opened.

4. The quality control method for preparing copper-clad laminate prepreg according to claim 3, characterized in that: A replenishment hole is provided at the bottom of the resin impregnation tank. The replenishment hole is connected to a preset buffer balance tank through a three-way pipe. The buffer balance tank is filled with resin and the liquid level is higher than the overflow hole on the impregnation tank.

5. The quality control method for preparing copper-clad laminate prepreg according to claim 4, characterized in that: A liquid replenishment valve is installed on the third pipeline; When the second relief valve is opened, the replenishment valve is closed; and when the second relief valve is closed, the replenishment valve is opened.

6. The quality control method for preparing copper-clad laminate prepreg according to claim 1, characterized in that: The acquisition of multi-factor interferometric anomaly quantification parameters includes: Images of the fiberglass cloth substrate during the resin impregnation process are captured using other cameras in a frontal view. Image analysis yielded fiberglass cloth matrix orientation data, which is one type of anomaly quantification data. The data closed-loop processing steps include: If the horizontal offset data does not meet the preset warp and weft skew conditions, the current fiberglass cloth substrate orientation data is compared with the preset standard operation fiberglass cloth substrate orientation data to obtain the orientation offset data. If the directional offset data meets the preset conditions for warp and weft misalignment, a warning message will be issued and / or the conveyor roller rotation will be stopped.

7. The quality control method for preparing copper-clad laminate prepreg according to claim 6, characterized in that: It also includes a verification material intermittent introduction step, which includes: Choose to color the warp and weft yarns separately; The colored warp and weft yarns were woven together using the same weaving method as the fiberglass cloth base material to obtain the verification material; When the horizontal offset data, liquid accumulation deviation data, or directional offset data meet the preset conditions for warp and weft skew, the original fiberglass cloth base material is cut off, a specified length of verification material is continued, and then fiberglass cloth base material is continued at the end of the verification material. Correspondingly, the data closed-loop processing step further includes: using another camera to capture images of the verification material coming out of the resin impregnation tank, and analyzing the images to obtain the latitude and longitude data of the verification material.

8. The quality control method for preparing copper-clad laminate prepreg according to claim 7, characterized in that: Before using a camera to capture images of the verification material, the resin residue on the side of the verification material facing the camera is cleaned with a scraper.

Images