CN117147556B - Quality detection system of polyimide insulating film - Google Patents
Quality detection system of polyimide insulating film Download PDFInfo
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- CN117147556B CN117147556B CN202311051431.6A CN202311051431A CN117147556B CN 117147556 B CN117147556 B CN 117147556B CN 202311051431 A CN202311051431 A CN 202311051431A CN 117147556 B CN117147556 B CN 117147556B
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- 239000004642 Polyimide Substances 0.000 title claims abstract description 249
- 229920001721 polyimide Polymers 0.000 title claims abstract description 249
- 238000001514 detection method Methods 0.000 title claims abstract description 69
- 239000000428 dust Substances 0.000 claims abstract description 34
- 238000012360 testing method Methods 0.000 claims abstract description 27
- 238000010183 spectrum analysis Methods 0.000 claims abstract description 20
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- 238000005979 thermal decomposition reaction Methods 0.000 claims description 23
- 230000008859 change Effects 0.000 claims description 20
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Classifications
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Abstract
The invention discloses a quality detection system of a polyimide insulating film, which particularly relates to the field of quality detection, and comprises a control module, a position detection dust removal module, a spectrum analysis module, a thermal analysis module, a mechanical property test module and an internal and external view detection module.
Description
Technical Field
The invention relates to the technical field of quality detection, in particular to a quality detection system of a polyimide insulating film.
Background
With the development of the age, a plurality of novel insulating films have indispensable functions in both industrial field and scientific field, and the use of the insulating films is not separated in daily industrial and scientific production, but the existing insulating films have single functionality and uneven quality, and certain potential safety hazards exist in industrial development.
The existing insulating film quality detection system has single function and low automation degree, cannot realize automatic detection of the insulating film, increases subjectivity of manual operation, cannot quickly and accurately detect fine defects, cannot store results and images of quality detection each time, forms data records, and is convenient for later analysis and tracing.
Disclosure of Invention
In order to overcome the above-mentioned drawbacks of the prior art, an embodiment of the present invention provides a quality inspection system for a polyimide insulating film, so as to solve the above-mentioned problems in the prior art.
In order to achieve the above purpose, the present invention provides the following technical solutions: a quality inspection system for a polyimide insulating film, comprising:
And the control module is used for: for collecting data of polyimide insulating film during the manufacturing process, including ambient temperature, humidity, and materials for transmitting work operation instructions to the respective subunits, simultaneously receiving various detection signals, displaying by using a display screen, and conveying the polyimide insulating film to a position detection dust removal module;
Position detection dust removal module: the dust removing device is used for carrying out dust removing treatment on the polyimide insulating films conveyed by the control module, so that the surfaces of the polyimide insulating films are smooth, the influence degree of external factors on the polyimide insulating films is reduced, the positions of the polyimide insulating films are detected, and the polyimide insulating films are conveyed to the spectrum analysis module;
and a spectrum analysis module: the polyimide insulating film detection module is used for detecting the chemical structure and the components of the polyimide insulating film conveyed by the dust removal module, determining the molecular structure, the functional genes and the pollutants of the polyimide insulating film and conveying the polyimide insulating film to the thermal analysis module;
Thermal analysis module: the device comprises a spectrum analysis module, a mechanical property test module, a polyimide insulation film detection module and a polyimide insulation film detection module, wherein the spectrum analysis module is used for carrying out thermal stability and thermal property on the polyimide insulation film conveyed by the spectrum analysis module, and evaluating the thermal decomposition temperature and the thermal expansion coefficient of the polyimide insulation film by measuring the quality and the thermal property of the polyimide insulation film under different temperature conditions and conveying the polyimide insulation film to the mechanical property test module;
The mechanical property testing module: the polyimide insulation film detection module is used for carrying out mechanical property assessment on the polyimide insulation film conveyed by the thermal analysis module, measuring corresponding deformation by applying mechanical load, recording the toughness strength of the polyimide insulation film and conveying the polyimide insulation film to the inner appearance detection module;
An inner appearance detection module: the device is used for observing the internal and external quality and defects of the polyimide insulating film conveyed by the mechanical property testing module so as to evaluate the flatness, the smoothness and the uniformity of the polyimide insulating film and whether bubbles and cracks exist or not, feeding the polyimide insulating film back to the control module and displaying the polyimide insulating film through the display screen.
As a further improvement of the present invention, the control module includes a main control device unit, a controller unit, a communication unit, and a display unit;
The main control equipment unit is used for sending commands to the communication unit, the communication unit classifies the commands according to the commands and sends the commands to each controller unit, the controller unit receives command signals and sends the command signals to each working subunit, otherwise, when the control unit needs to check detection signals of each working subunit, the control unit is connected with the data storage unit by the communication unit, so that the control equipment unit is connected with the display unit to transmit the detection signals to the display unit for presentation;
the controller unit converts the analog signals into digital signals through the signal processing circuit, and after the digital signals are processed, the controller unit transmits the digital signals to each serial port circuit through the classifying circuit, so that the serial port circuit is connected with each working subunit for transmission;
The communication unit is used for carrying out data transmission between the main controller unit and the controller unit, meanwhile, the main controller unit sends a communication command through the communication unit, and the controller sends a feedback signal through the communication unit.
As a further improvement of the present invention, the position detection and dust removal module removes dust from each polyimide insulating film and detects the position thereof, specifically by:
Adding a proper amount of plasma water and a soft brush specially designed for cleaning a polyimide insulating film into the position detection dust removal module, operating through a main controller, carrying out dust removal cleaning on the polyimide insulating film, lightly spraying cleaning solution on the surface of the polyimide insulating film, then gently wiping the surface with a cleaning tool to avoid damaging the surface of the polyimide insulating film, evaporating the water on the surface of the polyimide insulating film cleanly by utilizing dry airflow, extracting the edge of the polyimide insulating film to be detected by the position detection module through image extraction, analyzing a matrix of an image of the edge, retaining the effective pixels which are the edges of the polyimide insulating film in the image, calculating partial derivatives on the effective pixels in an original image, obtaining a gradient matrix of the effective pixels in the original image, finally analyzing the gradient matrix to obtain a matching standard of the edge gradient, and filtering objects of which the edge gradient is not matched in the polyimide insulating film by judging conditions;
Gray level histogram equalization and self-adaptive histogram equalization are carried out through image preprocessing, so that gray level distribution and brightness distribution of an image are uniform, local contrast of the image is changed through brightness redistribution, and whether the position of a polyimide insulating film deviates or not is obtained.
As a further improvement of the invention, the spectrum analysis module analyzes the chemical structure and the components of the polyimide insulating film, and the specific analysis mode is as follows:
The method comprises the steps of carrying out vacuum drying on a polyimide insulating film, drying the polyimide insulating film in combination with low-temperature conditions in the drying process, helping to slow down the rate of chemical reaction, avoiding possible oxidation reaction caused by electron beam heating, opening an infrared spectrometer after carrying out vacuum drying on the polyimide insulating film, using a hydrogen tungsten lamp as a light source required by experiments, setting the length of a light path to be 10mm, setting the resolution to be 4cm < -1 >, placing the polyimide insulating film to be detected in the infrared spectrometer after setting the values, calibrating an instrument, setting a zero point, fixing the polyimide insulating film to be detected by using a sample support, pressing a measuring button for spectral scanning, carrying out measurement by the instrument, leading emitted light to pass through the polyimide insulating film, recording the light intensity after passing through the polyimide insulating film, marking as I, carrying out measurement, leading the spectrogram into a data processor, drawing the spectrogram, calculating the transmittance through calculation of the reflectance and absorbance, manually selecting the positions of peaks, calculating the intensities and areas of the peaks, observing the positions and the intensities of the peaks on the different wavenumbers, indicating different functional groups, and comparing the specific polyimide insulating film with a polyimide (C=O) by the chemical insulating film, and determining the chemical insulating film, if the chemical insulating film has a specific polyimide insulating film, and a polyimide insulating film is subjected to a chemical insulating film, and a chemical insulating film is subjected to a chemical insulating film.
As a further improvement of the invention, the thermal analysis module evaluates the thermal decomposition temperature and the thermal expansion coefficient of the polyimide insulating film by measuring the quality and the thermal characteristics of the polyimide insulating film under different temperature conditions, wherein the specific measuring modes are as follows:
Cutting a polyimide insulating film into four uniform parts, respectively marking the four uniform parts as A 1,A2,A3,A4, putting A 1,A2,A3,A4 into a sample tray of a thermogravimetric balance, selecting nitrogen, setting the temperature range to B1, B 2,B3,B4, setting the temperature rise rate to 5-20 ℃/min, measuring the mass change condition of the polyimide insulating film along with the temperature change at the four temperatures, obtaining a thermal decomposition temperature T of the polyimide insulating film and a section of the polyimide insulating film for transmitting obvious mass loss according to a mass change curve, recording an initial temperature T b and a termination temperature T e of the section and corresponding mass loss percentages W b and W e, and calculating a thermal decomposition coefficient;
calculation of the average percent Mass loss Obtaining an average mass loss percentage W a, calculating a temperature difference value delta T=T e-Tb, obtaining a temperature difference value delta T, and calculating the thermal decomposition coefficient K of the polyimide insulating film through W a and delta T;
Recording the length of the polyimide insulating film when not measured as L 0, the linear dimension change amount delta L under temperature change and the temperature change amount delta T, and setting the thermal expansion coefficient as delta;
δ＝(ΔL-L0)/ΔT；
Comparing the thermal decomposition coefficient K and the thermal expansion coefficient delta of the detected polyimide insulating film with the qualified thermal decomposition coefficient K Qualified product and the thermal expansion coefficient delta Qualified product of the polyimide insulating film, and judging whether the quality of the detected polyimide insulating film meets the standard or not.
1. As a further improvement of the invention, the mechanical property testing module measures corresponding deformation by applying mechanical load and records the toughness strength of the polyimide insulating film, and the specific mode is as follows:
Uniformly cutting the polyimide insulating film into four parts, respectively marking as C 1,C2,C3,C4, respectively carrying out tensile bending test on C 1,C2,C3,C4, clamping a sample in a clamp of a tensile testing machine, ensuring that a stress area of the sample is free from torsion or damage, gradually applying tensile force, recording the original length and the stretched length of the polyimide insulating film, respectively marking as L 0,L Pulling device , marking the relative length as delta L, and carrying out the strain:
Strain = Δl/L 0;
wherein Δl is the length change under tensile or bending load, L 0 is the starting length, the strain of C 1,C2,C3,C4 is recorded, denoted as C' 1,C′2,C′3,C′4, the cross-sectional area S is estimated by measuring the thickness and width of the obtained polyimide insulating film, the load is set as F, and the stress can be calculated as:
stress = F/S;
where the load F is a force applied to the polyimide insulating film, the cross-sectional area S is a cross-sectional area of the polyimide insulating film in the direction in which the force acts, and the deformation coefficient ε is calculated:
The deformation coefficient ε 1,ε2,ε3,ε4 of C 1,C2,C3,C4 was recorded, and the toughness strength of the polyimide insulating film could be deduced by comparing the deformation coefficients of the polyimide insulating film under different loads.
As a further improvement of the present invention, the inside and outside view detection module evaluates the flatness, smoothness, uniformity and presence of bubbles and cracks of the polyimide insulating film by performing inside and outside view quality and defect observation, and the specific operation method is as follows:
The polyimide insulating film is compared with a standard polyimide insulating film, the surface of the polyimide insulating film is observed through a magnifying glass, whether the surface of the polyimide insulating film is smooth or not is evaluated, the color and the transparency of the polyimide insulating film are observed through a scanning electron microscope, the uniformity of the polyimide insulating film is visually checked, whether bubbles exist on the surface of the polyimide insulating film or not is observed through the magnifying glass, the bubbles can cause the surface of the polyimide insulating film to be uneven, or brightness difference is formed in uneven areas, and the surface of the polyimide insulating film is observed under a higher magnification by means of the microscope, so that whether micro cracks or fine cracks exist or not is checked.
The invention has the technical effects and advantages that:
1. the degree of automation is high: the system utilizes imaging equipment and an image processing algorithm to realize automatic quality detection of the polyimide insulating film, reduces subjectivity of manual operation and greatly improves the working efficiency of quality detection of the polyimide insulating film.
2. High efficiency and accuracy: the image processing algorithm is utilized to analyze the image, so that fine defects can be detected rapidly and accurately, and the quality detection efficiency is improved.
3. Data traceability: the system can save the image and the result of each quality detection to form a data record, so that the subsequent analysis and the tracing are convenient.
Drawings
Fig. 1 is a block diagram of a system architecture of the present invention.
Fig. 2 is a process step diagram of the present invention.
Detailed Description
The following description of the embodiments of the present invention will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present invention, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
Referring to fig. 1, the invention provides a quality detection system of a polyimide insulating film, which comprises a control module, a position detection dust removal module, a spectrum analysis module, a thermal analysis module, a mechanical property test module and an internal and external appearance detection module.
The output end of the control module is connected with the input end of the position detection dust removal module, the output end of the position detection dust removal module is connected with the input end of the spectrum analysis module, the output end of the spectrum analysis module is connected with the input end of the thermal analysis module, the output end of the thermal analysis module is connected with the input end of the mechanical property test module, and the output end of the mechanical property test module is connected with the input end of the internal and external appearance detection module.
The control module is used for collecting data of the polyimide insulating film in the manufacturing process, sending working operation instructions to each subunit, receiving various detection signals and displaying the detection signals through the display screen.
The position detection dust removal module is used for carrying out dust removal treatment on the polyimide insulating films conveyed by the control module, so that the surfaces of the polyimide insulating films are smooth, the influence degree of external factors on the polyimide insulating films is reduced, and the positions of the polyimide insulating films are detected.
In one possible design, the control module includes a master device unit, a controller unit, a communication unit, and a display unit;
The main control equipment unit is used for sending commands to the communication unit, the communication unit classifies the commands according to the commands and sends the commands to each controller unit, the controller unit receives command signals and sends the command signals to each working subunit, otherwise, when the control unit needs to check detection signals of each working subunit, the control unit is connected with the data storage unit by the communication unit, so that the control equipment unit is connected with the display unit to transmit the detection signals to the display unit for presentation;
the controller unit converts the analog signals into digital signals through the signal processing circuit, and after the digital signals are processed, the controller unit transmits the digital signals to each serial port circuit through the classifying circuit, so that the serial port circuit is connected with each working subunit for transmission;
The communication unit is used for carrying out data transmission between the main controller unit and the controller unit, meanwhile, the main controller unit sends a communication command through the communication unit, and the controller sends a feedback signal through the communication unit.
In one possible design, the position detection and dust removal module removes dust from each polyimide insulating film and detects the position of each polyimide insulating film, specifically by:
The position detection dust removal module is added with a proper amount of plasma water and a soft brush specially designed for cleaning a polyimide insulating film, the operation is carried out through a main controller, the polyimide insulating film is subjected to dust removal cleaning, a cleaning solution is lightly sprayed on the surface of the polyimide insulating film, then the surface is gently wiped by a cleaning tool so as not to damage the surface of the polyimide insulating film, the moisture on the surface of the polyimide insulating film is evaporated cleanly by utilizing dry airflow, the position detection module extracts the edge of the polyimide insulating film to be detected through image extraction, the matrix of an image of the edge is analyzed, the effective pixels of the polyimide insulating film are reserved in the image, the partial derivative is calculated for the effective pixels in the original image, the gradient matrix of the effective pixels in the original image is obtained, finally the gradient matrix is analyzed to obtain the matching standard of the edge gradient, and the object of which is not matched with the edge gradient in the polyimide insulating film is filtered through judging conditions.
The spectrum analysis module is used for analyzing the chemical structure and the components of the polyimide insulating film conveyed by the position detection dust removal module and determining the molecular structure, the functional genes and the pollutants of the polyimide insulating film.
In one possible design, the spectrum analysis module analyzes the chemical structure and the components of the polyimide insulating film in the following specific analysis modes:
The method comprises the steps of carrying out vacuum drying on a polyimide insulating film, drying the polyimide insulating film in combination with low-temperature conditions in the drying process, helping to slow down the rate of chemical reaction, avoiding possible oxidation reaction caused by electron beam heating, opening an infrared spectrometer after carrying out vacuum drying on the polyimide insulating film, using a hydrogen tungsten lamp as a light source required by experiments, setting the length of a light path to be 10mm, setting the resolution to be 4cm < -1 >, placing the polyimide insulating film to be detected in the infrared spectrometer after setting the values, calibrating an instrument, setting a zero point, fixing the polyimide insulating film to be detected by using a sample support, pressing a measuring button for spectral scanning, carrying out measurement by the instrument, leading emitted light to pass through the polyimide insulating film, recording the light intensity after passing through the polyimide insulating film, marking as I, carrying out measurement, leading the spectrogram into a data processor, drawing the spectrogram, calculating the transmittance through calculation of the reflectance and absorbance, manually selecting the positions of peaks, calculating the intensities and areas of the peaks, observing the positions and the intensities of the peaks on the different wavenumbers, indicating different functional groups, and comparing the specific polyimide insulating film with a polyimide (C=O) by the chemical insulating film, and determining the chemical insulating film, if the chemical insulating film has a specific polyimide insulating film, and a polyimide insulating film is subjected to a chemical insulating film, and a chemical insulating film is subjected to a chemical insulating film.
The thermal analysis module is used for carrying out thermal stability and thermal performance on the polyimide insulating film, and the thermal decomposition temperature and the thermal expansion coefficient of the polyimide insulating film are evaluated by measuring the quality and the thermal characteristics of the polyimide insulating film under different temperature conditions.
In one possible design, the thermal analysis module evaluates the thermal decomposition temperature and the thermal expansion coefficient of the polyimide insulating film by measuring the quality and the thermal characteristics of the polyimide insulating film under different temperature conditions, wherein the specific measurement modes are as follows:
Cutting a polyimide insulating film into four uniform parts, respectively marking the polyimide insulating film as A 1,A2,A3,A4, putting the A 1,A2,A3,A4 into a sample tray of a thermogravimetric balance, selecting nitrogen, setting the temperature range to B 1,B2,B3,B4, setting the temperature rise rate to 5-20 ℃/min, measuring the mass change condition of the polyimide insulating film along with the temperature change at the four temperatures, obtaining a thermal decomposition temperature T of the polyimide insulating film and a section of the polyimide insulating film for transmitting obvious mass loss according to the mass change curve, recording an initial temperature T b and an end temperature T e of the section, and corresponding mass loss percentages W b and W e, and calculating a thermal decomposition coefficient;
calculation of the average percent Mass loss Obtaining an average mass loss percentage W a, calculating a temperature difference value delta T=T e-Tb, obtaining a temperature difference value delta T, and calculating the thermal decomposition coefficient K of the polyimide insulating film through W a and delta T;
Recording the length of the polyimide insulating film when not measured as L 0, the linear dimension change amount delta L under temperature change and the temperature change amount delta T, and setting the thermal expansion coefficient as delta;
δ＝(ΔL-L0)/ΔT；
Comparing the thermal decomposition coefficient K and the thermal expansion coefficient delta of the detected polyimide insulating film with the qualified thermal decomposition coefficient K Qualified product and the thermal expansion coefficient delta Qualified product of the polyimide insulating film, and judging whether the quality of the detected polyimide insulating film meets the standard or not.
The mechanical property testing module is used for evaluating the mechanical property of the polyimide insulating film, measuring the corresponding deformation by applying mechanical load, and recording the toughness strength of the polyimide insulating film.
In one possible design, the mechanical property testing module measures corresponding deformation by applying mechanical load, and records the toughness strength of the polyimide insulating film, specifically by the following steps:
Uniformly cutting the polyimide insulating film into four parts, respectively marking as C 1,C2,C3,C4, respectively carrying out tensile bending test on C 1,C2,C3,C4, clamping a sample in a clamp of a tensile testing machine, ensuring that a stress area of the sample is free from torsion or damage, gradually applying tensile force, recording the original length and the stretched length of the polyimide insulating film, respectively marking as L 0,L Pulling device , marking the relative length as delta L, and carrying out the strain:
Strain = Δl/L 0;
wherein Δl is the length change under tensile or bending load, L 0 is the starting length, the strain of C 1,C2,C3,C4 is recorded, denoted as C' 1,C′2,C′3,C′4, the cross-sectional area S is estimated by measuring the thickness and width of the obtained polyimide insulating film, the load is set as F, and the stress can be calculated as:
stress = F/S;
where the load F is a force applied to the polyimide insulating film, the cross-sectional area S is a cross-sectional area of the polyimide insulating film in the direction in which the force acts, and the deformation coefficient ε is calculated:
The deformation coefficient ε 1,ε2,ε3,ε4 of C 1,C2,C3,C4 was recorded, and the toughness strength of the polyimide insulating film could be deduced by comparing the deformation coefficients of the polyimide insulating film under different loads.
The inner and outer appearance detection module is used for observing inner and outer appearance quality and defects of the polyimide insulating film conveyed by the mechanical property test module so as to evaluate flatness, smoothness and uniformity of the polyimide insulating film and whether bubbles and cracks exist.
In one possible design, the inside and outside appearance detection module evaluates the flatness, smoothness, uniformity and presence of bubbles and cracks of the polyimide insulating film by performing inside and outside appearance quality and defect observation, and the specific operation modes are as follows:
The polyimide insulating film is compared with a standard polyimide insulating film, the surface of the polyimide insulating film is observed through a magnifying glass, whether the surface of the polyimide insulating film is smooth or not is evaluated, the color and the transparency of the polyimide insulating film are observed through a scanning electron microscope, the uniformity of the polyimide insulating film is visually checked, whether bubbles exist on the surface of the polyimide insulating film or not is observed through the magnifying glass, the bubbles can cause the surface of the polyimide insulating film to be uneven, or brightness difference is formed in uneven areas, and the surface of the polyimide insulating film is observed under a higher magnification by means of the microscope, so that whether micro cracks or fine cracks exist or not is checked.
In this embodiment, the present invention performs dust removal treatment on the polyimide insulating film, detects the position of the polyimide insulating film, performs preparation before quality detection on the polyimide insulating film, performs spectroscopic analysis on the polyimide insulating film, determines the molecular structure of the polyimide insulating film, performs thermal analysis on the polyimide insulating film, evaluates the thermal decomposition temperature and thermal expansion coefficient of the polyimide insulating film by measuring the quality and thermal characteristics of the polyimide insulating film under different temperature conditions, measures the corresponding deformation by applying mechanical load, records the toughness strength of the polyimide insulating film, performs internal and external detection on the polyimide insulating film, evaluates the flatness, smoothness and uniformity of the polyimide insulating film, and whether bubbles and cracks exist, and feeds back to the control module for display through the display screen.
As shown in fig. 2, the present embodiment provides a quality detection method of a polyimide insulating film, including the steps of:
S1, a worker sends out a working instruction to subunits of a control module, receives detection signals returned by the subunits, displays the detection signals through a display screen, and clicks a conveying button to convey a polyimide insulating film to a position detection dust removal module;
S2, carrying out dust removal treatment on the polyimide insulating films conveyed by the control module, detecting the positions of the polyimide insulating films, and conveying the polyimide insulating films to the spectrum analysis module;
S3, testing the thermal stability and the thermal performance of the polyimide insulating film conveyed by the spectrum analysis module, calculating the thermal decomposition temperature and the thermal expansion coefficient of the polyimide insulating film by measuring the quality and the thermal characteristics of the polyimide insulating film under different temperature conditions, and conveying the polyimide insulating film subjected to the test to a mechanical property testing module;
S4, evaluating mechanical properties of the polyimide insulating film conveyed by the thermal analysis module, measuring corresponding deformation by applying mechanical load, recording toughness strength of the polyimide insulating film, and conveying the polyimide insulating film to the internal appearance detection module;
S5, observing the internal and external quality and defects of the polyimide insulating film conveyed by the mechanical property testing module to evaluate the flatness, smoothness and uniformity of the polyimide insulating film and whether bubbles and cracks exist or not, feeding the polyimide insulating film back to the control module and displaying the polyimide insulating film through the display screen.
Finally: the foregoing description of the preferred embodiments of the invention is not intended to limit the invention to the precise form disclosed, and any such modifications, equivalents, and alternatives falling within the spirit and principles of the invention are intended to be included within the scope of the invention.
Claims (1)
1. A quality inspection system for a polyimide insulating film, comprising:
And the control module is used for: the device comprises a polyimide insulating film, a position detection dust removal module and a position detection dust removal module, wherein the polyimide insulating film is used for collecting data in a manufacturing process of the polyimide insulating film, sending working instructions to a subunit, the subunit comprises a main control equipment unit, a controller unit, a communication unit and a display unit, receiving detection signals returned by the subunits and displaying the detection signals through a display screen, and a worker clicks a conveying button to convey the polyimide insulating film to the position detection dust removal module;
Position detection dust removal module: the polyimide insulating films are used for carrying out dust removal treatment on the polyimide insulating films conveyed by the control module, detecting the positions of the polyimide insulating films and conveying the polyimide insulating films to the spectrum analysis module;
And a spectrum analysis module: the polyimide insulating film is used for analyzing the chemical structure and the components of the polyimide insulating film conveyed by the position detection dust removal module and conveying the polyimide insulating film to the thermal analysis module;
Thermal analysis module: the device comprises a spectrum analysis module, a mechanical property testing module, a polyimide insulation film conveying module, a mechanical property testing module and a polyimide insulation film conveying module, wherein the spectrum analysis module is used for carrying out thermal stability and thermal property testing on the polyimide insulation film conveyed by the spectrum analysis module, calculating the thermal decomposition temperature and the thermal expansion coefficient of the polyimide insulation film by measuring the quality and the thermal property of the polyimide insulation film under different temperature conditions, and conveying the polyimide insulation film subjected to the testing to the mechanical property testing module;
The mechanical property testing module: the polyimide insulation film detection module is used for carrying out mechanical property assessment on the polyimide insulation film conveyed by the thermal analysis module, measuring corresponding deformation by applying mechanical load, recording the toughness strength of the polyimide insulation film and conveying the polyimide insulation film to the inner appearance detection module;
an inner appearance detection module: the polyimide insulating film conveying device is used for observing the inner and outer quality and defects of the polyimide insulating film conveyed by the mechanical property testing module so as to evaluate the flatness, the smoothness and the uniformity of the polyimide insulating film and whether bubbles and cracks exist or not, feeding the polyimide insulating film back to the control module and displaying the polyimide insulating film through a display screen
The control module comprises a main control equipment unit, a controller unit, a communication unit and a display unit;
The main control equipment unit is used for sending commands to the communication unit, the communication unit classifies the commands according to the commands and sends the commands to each controller unit, the controller unit receives command signals and sends the command signals to each working subunit, otherwise, when the control unit needs to check detection signals of each working subunit, the control unit is connected with the data storage unit by the communication unit, so that the control equipment unit is connected with the display unit to transmit the detection signals to the display unit for presentation;
the controller unit converts the analog signals into digital signals through the signal processing circuit, and after the digital signals are processed, the controller unit transmits the digital signals to each serial port circuit through the classifying circuit, so that the serial port circuit is connected with each working subunit for transmission;
The communication unit is used for carrying out data transmission between the main controller unit and the controller unit, meanwhile, the main controller unit sends a communication command through the communication unit, and the controller sends a feedback signal through the communication unit;
The position detection dust removal module removes dust from each polyimide insulating film and detects the position of each polyimide insulating film, and the specific steps are as follows:
S1, adding a proper amount of plasma water and a soft brush specially designed for cleaning a polyimide insulating film into the position detection dust removal module;
s2, performing operation through a main controller, lightly spraying a cleaning solution on the surface of the polyimide insulating film, and then gently wiping the surface with a cleaning tool to remove dust and clean the polyimide insulating film;
S3, extracting the edge of the polyimide insulating film through an image extraction technology after dust removal treatment is completed, and mathematically analyzing a matrix of the edge image;
S4, reserving effective pixels with edges of polyimide insulating films in the image, and calculating partial derivatives of the effective pixels in the original image to obtain a gradient matrix of the effective pixels in the original image;
S5, finally analyzing the gradient matrix to obtain a matching standard of the edge gradient, and filtering out objects which are not matched with the edge gradient in the polyimide insulating film through judging conditions;
S6, gray level histogram equalization and self-adaptive histogram equalization are carried out through image preprocessing, so that gray level distribution and brightness distribution of an image are uniform, and local contrast of the image is changed through redistributing brightness;
the spectrum analysis module analyzes the chemical structure and the components of the polyimide insulating film, and the specific analysis steps are as follows:
s101, drying the polyimide insulating film at a low temperature in vacuum to avoid oxidation reaction caused by electron beam heating;
S102, a worker turns on an infrared spectrometer, a hydrogen tungsten lamp is used as a light source required by an experiment, and after numerical values are set, a polyimide insulating film to be tested is placed in the infrared spectrometer;
s103, calibrating an instrument by a worker, setting a zero point, fixing a polyimide insulating film to be tested by using a sample support, and pressing a measuring button to perform spectrum scanning;
S104, the instrument passes the emitted light through the polyimide insulating film during measurement, and records the light intensity after passing through the polyimide insulating film, and the light intensity is recorded as I;
S105, automatically generating a spectrogram by the instrument after the measurement is completed, leading the spectrogram into a data processor by a worker, drawing the spectrogram, and calculating the reflectivity and absorbance to obtain the transmittance;
S106, manually selecting the position of a peak by a worker, calculating the intensity and the area of the peak, and observing whether a specific functional group imide bond (C=O) and a primary amine bond (C-NH) exist in the polyimide insulating film;
S107, if a specific functional group is present, estimating the chemical structure of the polyimide insulating film by observing the resonance frequency range of the imide bond (c=o) and the primary amine bond (c—nh);
S108, comparing an infrared spectrogram of the polyimide insulating film with a spectrum of a known compound to determine chemical components of the polyimide insulating film;
the thermal analysis module evaluates the thermal decomposition temperature and the thermal expansion coefficient of the polyimide insulating film by measuring the quality and the thermal characteristics of the polyimide insulating film under different temperature conditions, and the specific measuring mode is as follows:
The polyimide insulating film was cut into four uniform portions, which were respectively designated as Will/>Put into a sample pan of a thermogravimetric balance, select nitrogen and set the temperature range to/>The temperature rising rate is set to 5-20Measuring mass change conditions of the polyimide insulating film along with temperature change at four temperatures, obtaining a thermal decomposition temperature T of the polyimide insulating film and a section of the polyimide insulating film for transmitting obvious mass loss according to a mass change curve, and recording the initial temperature/>And termination temperature/>And the corresponding percent mass loss/>And/>Calculating a thermal decomposition coefficient;
calculation of the average percent Mass loss To obtain the average mass loss percentage/>Calculating the temperature differenceObtaining the temperature difference/>By/>And/>The thermal decomposition coefficient of the polyimide insulating film can be calculated to be K;
；
The length of the polyimide insulating film when not measured was recorded as Linear dimensional change amount under temperature change/>Temperature variation/>Let the thermal expansion coefficient be/>；
；
The thermal decomposition coefficient K and the thermal expansion coefficient of the polyimide insulating film to be detectedGood thermal decomposition coefficient with polyimide insulating film/>And coefficient of thermal expansion/>Comparing, and judging whether the quality of the detected polyimide insulating film meets the standard;
The mechanical property testing module measures corresponding deformation by applying mechanical load and records the toughness strength of the polyimide insulating film, and the specific mode is as follows:
Uniformly cutting polyimide insulating film into four parts, respectively designated as Respectively pair/>Carrying out a tensile bending test, clamping a sample in a clamp of a tensile testing machine, ensuring that a stress area of the sample is not distorted or damaged, gradually applying a tensile force, and recording the original length and the stretched length of the polyimide insulating film, which are respectively recorded as/>，The relative length is/>The strain that can be found:
；
Wherein the method comprises the steps of For length change under tensile or bending load,/>Is the initial length, record/>, respectivelyIs denoted as/>By measuring the thickness and width of the polyimide insulating film, the cross-sectional area S is estimated, and assuming the load as F, the stress can be calculated as:
；
wherein the load F is a force applied to the polyimide insulating film, the cross-sectional area S is a cross-sectional area of the polyimide insulating film in the direction in which the force acts, and the deformation coefficient is calculated ：
；
Separately recordDeformation coefficient/>Comparing the deformation coefficients of the polyimide insulating film under different loads, so that the toughness strength of the polyimide insulating film can be deduced;
The inside and outside appearance detection module evaluates the flatness, smoothness and uniformity of the polyimide insulating film and whether bubbles and cracks exist or not by carrying out inside and outside appearance quality and defect observation, and the specific operation mode is as follows:
comparing the polyimide insulating film with a standard polyimide insulating film, evaluating whether the polyimide insulating film is smooth or not, observing the color and the transparency of the polyimide insulating film by a worker through a scanning electron microscope, observing whether bubbles exist on the surface of the polyimide insulating film through a magnifying glass, observing the surface of the polyimide insulating film by the worker through a microscope under a specified magnification, and judging whether micro cracks or fine marks exist or not through a series of checks.
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