An optimization system for a signal transmission circuit board employing a stripline layout

Abstract

This invention belongs to the field of high-speed digital circuit technology. It provides an optimization system for a signal transmission circuit board using a stripline layout, comprising: a data coupling module, which collects resin parameters and stripline structure parameters through sensors, calculates the real-time resin flow velocity using the Poiseuille flow formula, integrates and cleans the data to construct a coupling model, and outputs real-time lateral thrust; a displacement analysis module, which superimposes curing shrinkage stress to construct a displacement prediction matrix and determines whether a shift has occurred through lateral displacement characteristics; if a shift occurs, a system construction module, which constructs a three-dimensional real-time suppression system, collaboratively applies reverse constraint force, and adjusts pressure and temperature; and a collaborative control module, which, for situations where control does not meet expectations, identifies the root cause by analyzing the constraint efficiency of each unit. If the cause is insufficient synergy, it optimizes the unit control timing and parameter matching to achieve real-time control of interlayer shift.

Description

Technical Field

[0001] This invention belongs to the field of high-speed digital circuit technology, specifically an optimized system for a signal transmission circuit board with a stripline layout. Background Technology

[0002] With the rapid development of electronic devices towards high density and high integration, stripline structures have been widely used in the core circuit design of high-end printed circuit boards due to their excellent signal transmission stability. As a key step in circuit board manufacturing, lamination process requires the tight bonding of multilayer core boards, prepregs and copper foils through high temperature and high pressure. The flow behavior of resin and curing reaction in this process directly affect the interlayer alignment accuracy.

[0003] However, during the lamination heating stage, the resin melts and flows laterally in the gaps between the strips, accompanied by curing shrinkage. The two together generate a lateral driving force, which can easily cause interlayer displacement of the core board.

[0004] In existing technologies, the control of interlayer misalignment is mostly focused on single parameter monitoring or passive constraint methods; it cannot fully reflect the core causes of interlayer misalignment; at the same time, existing suppression methods mostly adopt single constraint or pressure adjustment methods, lacking coordinated control of viscosity, flow rate and constraint force, and it is difficult to dynamically optimize parameters according to real-time operating conditions, resulting in lagging control response and poor suppression effect, which cannot meet the stringent requirements of high-density circuit boards for interlayer alignment accuracy.

[0005] Therefore, the present invention provides an optimized system for a signal transmission circuit board with a stripline layout. Summary of the Invention

[0006] In order to overcome the shortcomings of the prior art, at least one technical problem raised in the background art is solved.

[0007] The technical solution adopted by this invention to solve its technical problem is: an optimized system for a signal transmission circuit board with a stripline layout, the optimized system comprising the following modules:

[0008] Data coupling module: used to acquire resin parameters and strip wire structure parameters and integrate them to obtain the lateral force dataset; and to construct a resin lateral force coupling model based on the lateral force dataset;

[0009] The process of constructing the resin lateral force coupling model is as follows:

[0010] Calculate the lateral thrust area by multiplying the actual lamination height and the actual lateral length.

[0011] Obtain the resin melt viscosity, real-time flow rate, lateral thrust area, and resin content correction factor;

[0012] The real-time lateral thrust is calculated by multiplying the resin melt viscosity, real-time flow velocity, lateral thrust area, and resin content correction factor.

[0013] Displacement analysis module: Based on the resin lateral force coupling model, a displacement prediction matrix is ​​constructed by superimposing curing shrinkage stress to obtain lateral displacement characteristic quantities; interlayer migration analysis is performed based on the lateral displacement characteristic quantities to determine whether interlayer migration has occurred;

[0014] The process of constructing the displacement prediction matrix is ​​as follows:

[0015] Obtain the curing shrinkage stress and the angle between the surface of the curing shrinkage stress and the lateral displacement direction of the core board, and calculate the sine value of the angle by performing a sine calculation on the angle.

[0016] The lateral component force is obtained by multiplying the curing shrinkage stress, the sine of the included angle, and the lateral thrust area.

[0017] The real-time total lateral driving force is obtained by summing the real-time lateral thrust and lateral component force.

[0018] The obtained core board material, thickness, and stacking structure parameters were used to determine the lateral stiffness of the core board using the equivalent stiffness theory of laminates.

[0019] The lateral displacement scale value at different sampling time points during the compression heating stage is obtained by calculating the ratio of the total lateral driving force to the lateral stiffness.

[0020] The lateral displacement characteristic quantity is obtained by summing the lateral displacement scale values ​​at different acquisition time points during the compression and heating stage.

[0021] System setup module: If interlayer misalignment occurs, a 3D real-time suppression system is built to optimize the continuous development of interlayer misalignment; based on the real-time offset of the core board acquired by the implemented 3D real-time suppression system, it is determined whether the adjustment is in line with expectations based on the real-time offset.

[0022] The method for building a three-dimensional real-time suppression system is as follows:

[0023] Obtain the safety factor, and calculate the reverse constraint force by multiplying the total lateral driving force by the safety factor;

[0024] The target resin flow rate set in the system is obtained, and the difference between the target resin flow rate and the real-time flow rate of the resin in the lateral direction is calculated to obtain the target flow rate deviation.

[0025] Obtain the pressure correction coefficient, and multiply the target flow velocity deviation by the pressure correction coefficient to obtain the pressure adjustment value;

[0026] Obtain the temperature correction coefficient, calculate the difference between the current resin melt viscosity and the target resin viscosity, and multiply the calculated difference with the temperature correction coefficient to obtain the temperature compensation value.

[0027] Collaborative regulation module: If the expected results are not met, a retrospective analysis is performed on the three-dimensional real-time suppression system to identify the root cause of regulation failure; if the root cause of regulation failure is insufficient synergy of the three-dimensional real-time suppression system, then the three-dimensional real-time suppression system is coupled and optimized.

[0028] The process of performing the traceability analysis is as follows:

[0029] The total lateral driving force, real-time flow velocity, and resin melt viscosity were obtained after the three-dimensional real-time suppression system was regulated.

[0030] The difference between the total lateral driving force before and after regulation is calculated, and the result of the difference calculation is compared with the reverse constraint force to obtain the constraint efficiency of the flexible lateral constraint unit.

[0031] The target resin flow rate is obtained, and the difference between the target resin flow rate and the real-time flow rate after adjustment is calculated to obtain the first difference. The difference between the target resin flow rate and the real-time flow rate before adjustment is calculated to obtain the second difference.

[0032] The constraint efficiency of the active pressure control unit is obtained by calculating the ratio of the first difference to the second difference.

[0033] Furthermore, the actual lateral length is obtained as follows:

[0034] Obtain the horizontal length of the strip region and the designed horizontal length;

[0035] The assembly deviation value is obtained by calculating the difference between the transverse length of the strip area and the designed transverse length. The actual transverse length is obtained by summing the assembly deviation value and the designed transverse length.

[0036] Furthermore, the method for obtaining the curing shrinkage stress is as follows:

[0037] Obtain the real-time volume shrinkage rate, real-time elastic modulus, and constraint factor of the resin.

[0038] The curing shrinkage stress is obtained by multiplying the volume shrinkage rate, elastic modulus, and constraint factor.

[0039] Furthermore, the method for determining whether the adjustment is in line with expectations is as follows:

[0040] Obtain the total duration of the pressing and heating stage; calculate the maximum allowable lateral displacement per unit time by comparing the preset lateral feature limit with the total duration of the pressing and heating stage.

[0041] The real-time offset after the implementation of the three-dimensional real-time suppression system is collected, and the real-time offset is compared with the maximum lateral displacement feature.

[0042] If the real-time offset is greater than the maximum lateral displacement feature, it indicates that the optimization effect of the 3D real-time suppression system does not meet expectations.

[0043] If the real-time offset is less than or equal to the maximum lateral displacement feature, it means that the optimization effect of the 3D real-time suppression system meets expectations.

[0044] Furthermore, the constraint efficiency of the local temperature compensation unit in the three-dimensional real-time suppression system is obtained as follows:

[0045] Obtain the target resin viscosity, calculate the difference between the adjusted resin melt viscosity and the target resin viscosity to obtain the first viscosity difference, and calculate the difference between the unadjusted resin melt viscosity and the target resin viscosity to obtain the second viscosity difference.

[0046] The constraint efficiency of the local temperature compensation unit is obtained by calculating the ratio of the first viscosity difference to the second viscosity difference.

[0047] Furthermore, the coupling optimization is performed as follows:

[0048] The resin melt viscosity is adjusted to the target resin viscosity using a local temperature compensation unit.

[0049] Then the active pressure control unit is activated to dynamically adjust the vertical pressure according to the target flow rate deviation and correct the resin lateral flow rate.

[0050] Finally, a reverse constraint force is applied by the flexible lateral constraint unit to offset the remaining lateral driving force.

[0051] The beneficial effects of this invention are as follows:

[0052] 1. Obtain resin parameters and stripline structure parameters to integrate and obtain a lateral force dataset; construct a resin lateral force coupling model based on the lateral force dataset; integrate key parameters of resin and stripline structure to generate a target dataset, and quickly construct a resin lateral force coupling model to support related analysis or applications; based on the resin lateral force coupling model, superimpose curing shrinkage stress to construct a displacement prediction matrix to obtain lateral displacement characteristic quantities; perform interlayer migration analysis based on lateral migration characteristic quantities to determine whether interlayer migration has occurred; integrate lateral force and curing shrinkage stress factors to obtain lateral migration characteristic quantities, and efficiently complete interlayer migration determination to ensure the stability of related products or structures.

[0053] 2. If interlayer misalignment occurs, a three-dimensional real-time suppression system is established to optimize the continuous development of interlayer misalignment. Based on the real-time offset of the core board collected by the implemented three-dimensional real-time suppression system, it is determined whether the adjustment expectation is met. The interlayer misalignment is responded to in real time and its development is blocked through the three-dimensional suppression system, and the adjustment effect is verified simultaneously to ensure the assembly accuracy and stability of the core board and related structures. If the expectation is not met, the three-dimensional real-time suppression system is traced and analyzed to identify the root cause of the control failure. If the control failure is due to insufficient coordination of the three-dimensional real-time suppression system, the three-dimensional real-time suppression system is coupled and optimized. The root cause of the control failure is traced, and the coupling performance is optimized for insufficient system coordination to continuously improve the lateral displacement control effect and stability of the three-dimensional real-time suppression system. Attached Figure Description

[0054] The invention will now be further described with reference to the accompanying drawings.

[0055] Figure 1 This is a block diagram of an optimized system for a signal transmission circuit board with a stripline layout according to the present invention.

[0056] Figure 2 This is a logic diagram for determining whether interlayer offset has occurred, as described in an embodiment of the present invention.

[0057] Figure 3 This is a step diagram of an optimization method for a signal transmission circuit board with a stripline layout in this invention. Detailed Implementation

[0058] To make the technical means, creative features, objectives and effects of this invention easier to understand, the invention will be further described below in conjunction with specific embodiments.

[0059] Example 1: Please refer to Figures 1-2 As shown in the embodiment of the present invention, an optimization system for a signal transmission circuit board using a stripline layout addresses the interlayer misalignment problem that easily occurs during the circuit board lamination process. This problem is caused by the combined effects of resin flow thrust, curing shrinkage stress, and differences in thermal expansion coefficients, leading to core board misalignment and stripline alignment failure, severely impacting product processing accuracy and performance. The system collects data such as resin melt viscosity and stripline structural parameters from multiple sensors, integrates this data to construct a resin lateral force coupling model, and superimposes curing shrinkage stress to build a displacement prediction matrix to identify interlayer misalignment risks. If the misalignment exceeds the limit, a three-dimensional real-time suppression system with flexible lateral constraints, active pressure control, and local temperature compensation is built to collaboratively control the misalignment. If the optimization fails to meet expectations, the root cause of the failure is traced and identified, and coupling optimization is performed to address insufficient synergy, achieving real-time control of interlayer misalignment. The system includes the following modules:

[0060] Data coupling module: Acquires resin parameters and strip wire structure parameters and integrates them to obtain lateral force dataset; constructs resin lateral force coupling model based on lateral force dataset;

[0061] The process of obtaining the lateral force dataset by integrating the resin parameters and the strip wire structure parameters is as follows:

[0062] It should be noted that the resin parameters and the strip structure parameters include the resin melt viscosity, the stress area of ​​the strip region, and the real-time flow rate of the resin.

[0063] During the pressing and heating stage, the high-frequency resonant viscosity sensor of the embedded lamination equipment is used to collect the resin melt viscosity in real time at a sampling frequency of 5Hz, and simultaneously record the corresponding temperature data.

[0064] A laser 3D scanner was used to scan the stacked core board to obtain the actual lamination height and lateral length of the stripe area.

[0065] It is understandable that the actual lamination height is the total height of the stacked core board, which is composed of multiple layers of prepreg, copper foil and inner substrate. The lamination height refers to the actual total height of the stacked structure in the vertical direction, which directly affects the longitudinal dimension of the strip area.

[0066] The horizontal length of the obtained strip region is corrected:

[0067] The assembly deviation value is obtained by calculating the difference between the obtained transverse length of the strip area and the design transverse length. The actual transverse length is obtained by summing the assembly deviation value and the design transverse length.

[0068] It should be noted that the design lateral length is the theoretical lateral dimension of the strip line extracted from the design documents; the physical significance of correcting the obtained lateral length of the strip line area is that: during the stacking process, the actual length may not match the design value due to positioning deviations (such as core board misalignment, mold positioning error), so it is necessary to correct it by adding the design value to the assembly deviation.

[0069] The pressure gradient data of the resin during lateral flow is monitored by a microchannel pressure sensor array. Based on the acquired pressure gradient data, the real-time flow velocity of the resin during lateral flow is calculated using the Poiseuille flow formula. The acquisition frequency of the microchannel pressure sensor array is synchronized with the sampling frequency of the high-frequency resonant viscosity sensor.

[0070] It should be noted that during the pressing and heating stage, the resin flow space is a rectangular micro-gap between the strip lines; the process of calculating using the Poiseuille flow formula is to obtain the pressure difference between the two ends of the rectangular micro-gap, the resin melt viscosity, and the length of the rectangular micro-gap, and then divide the pressure difference between the two ends by the product of the resin melt viscosity and the length of the rectangular micro-gap to obtain the real-time flow velocity of the resin during transverse flow.

[0071] The collected resin melt viscosity, real-time resin flow rate, actual lamination height, and actual lateral length are integrated to obtain the original lateral force dataset.

[0072] The lateral force dataset was obtained by cleaning outliers using the standard score method based on the original lateral force dataset.

[0073] The process of constructing the resin lateral force coupling model based on the lateral force dataset is as follows:

[0074] A resin lateral force coupling model is constructed based on the lateral force dataset. The resin melt viscosity, real-time resin flow velocity, actual lamination height and actual lateral length are input into the resin lateral force coupling model to obtain the real-time lateral thrust.

[0075] The process of constructing the resin lateral force coupling model is as follows:

[0076] The lateral thrust area is calculated by multiplying the actual lamination height by the actual lateral length.

[0077] Based on the resin melt viscosity, real-time flow rate, and lateral thrust area, a resin content correction factor is introduced;

[0078] It should be noted that the resin content correction factor was determined by those skilled in the art through experiments with different resin contents;

[0079] The real-time lateral thrust is calculated by multiplying the resin melt viscosity, real-time flow velocity, lateral thrust area, and resin content correction factor.

[0080] Displacement analysis module: Based on the resin lateral force coupling model, a displacement prediction matrix is ​​constructed by superimposing curing shrinkage stress to obtain lateral displacement characteristic quantities; interlayer migration analysis is performed based on the lateral displacement characteristic quantities to determine whether interlayer migration has occurred;

[0081] The process of constructing a displacement prediction matrix based on the resin lateral force coupling model and superimposing the difference between curing shrinkage stress and thermal expansion coefficient to obtain lateral displacement characteristic quantities is as follows:

[0082] A shrinkage-stress synchronous detection system was used to collect the real-time volume shrinkage rate and real-time elastic modulus of the resin at a sampling frequency of 5Hz.

[0083] Understandably, the real-time volume shrinkage rate of resin is the percentage difference between the resin volume at the current temperature and the maximum volume in the molten state; the real-time elastic modulus of resin reflects the resin's ability to resist deformation at the current degree of curing.

[0084] The curing shrinkage stress is obtained by multiplying the volume shrinkage rate, elastic modulus, and constraint factor.

[0085] For example, the constraint factor reflects the ability of the stacked structure to constrain resin shrinkage, which is determined by those skilled in the art through multiple experiments using a constraint strength tester.

[0086] It should be noted that the physical meaning of curing shrinkage stress is the internal stress that cannot be freely released due to the volume shrinkage effect of the resin during the lamination and curing stage of the circuit board, which is constrained by the rigidity of the stacked structure such as the core board and copper foil. The core board and copper foil in the stacked structure have high hardness and weak deformation ability, which will hinder the resin shrinkage, and thus generate interactive internal stress at the interface between the resin and the core board and copper foil. This stress not only exists in the vertical lamination direction, but also forms a lateral component force through the interface. Its direction is consistent with the lateral thrust caused by the lateral flow of resin, which together pushes the core board to undergo lateral displacement. It has a more significant impact on structures with large lateral dimensions and wide stress area, such as strip lines, and is one of the key factors that aggravate interlayer misalignment and lead to interlayer alignment failure.

[0087] The lateral force conversion is based on the obtained curing shrinkage stress. The specific process of lateral force conversion is as follows:

[0088] The angle between the curing shrinkage stress surface and the lateral displacement direction of the core board was extracted using a laser 3D scanner.

[0089] The lateral component force is obtained by multiplying the curing shrinkage stress, the sine of the included angle, and the lateral thrust area.

[0090] For example, the lateral component is the force component of the curing shrinkage stress in the lateral displacement direction of the core board, which works together with the resin flow side thrust to push the core board displacement.

[0091] The process of constructing the displacement prediction matrix based on the lateral force component is as follows:

[0092] The real-time total lateral driving force is obtained by summing the real-time lateral thrust and lateral component force.

[0093] The lateral stiffness of the core board is determined using the equivalent stiffness theory of laminated plates based on the obtained core board material, thickness and stacking structure parameters.

[0094] The lateral displacement scale value at different sampling time points during the compression heating stage is obtained by calculating the ratio of the total lateral driving force to the lateral stiffness.

[0095] The lateral displacement characteristic quantity is obtained by summing the lateral displacement scale values ​​at different acquisition time points during the compression and heating stage.

[0096] The process of determining whether inter-layer migration has occurred based on lateral displacement characteristic quantities is as follows:

[0097] For example, the lateral feature quantity is compared with a preset lateral feature limit quantity;

[0098] It should be noted that the preset lateral feature limit is obtained by those skilled in the art through analysis of the degree of offset by historical core board interlayer offset events;

[0099] If the lateral feature quantity is greater than or equal to the preset lateral feature limit quantity, it indicates that the offset of the core board has exceeded the acceptable range and is marked as an interlayer offset event.

[0100] If the lateral feature amount is less than the preset lateral feature limit, it means that the offset of the core board is still within the acceptable range of the process and no processing is required.

[0101] The technical solution of this embodiment is as follows: A lateral force dataset is obtained by integrating resin parameters and stripline structure parameters; a resin lateral force coupling model is constructed based on the lateral force dataset; a target dataset is generated by integrating key parameters of the resin and stripline structure, and a resin lateral force coupling model is quickly constructed to support related analysis or applications; a displacement prediction matrix is ​​constructed by superimposing curing shrinkage stress on the resin lateral force coupling model to obtain lateral displacement characteristic quantities; interlayer migration analysis is performed based on the lateral migration characteristic quantities to determine whether interlayer migration has occurred; lateral force and curing shrinkage stress factors are integrated to obtain lateral migration characteristic quantities, and interlayer migration determination is efficiently completed to ensure the stability of related products or structures.

[0102] Example 2: Please refer to Figure 2 As shown in the embodiment of the present invention, an optimized system for a signal transmission circuit board with a stripline layout includes the following modules:

[0103] System setup module: If interlayer misalignment occurs, a 3D real-time suppression system is built to optimize the continuous development of interlayer misalignment; based on the real-time offset of the core board acquired by the implemented 3D real-time suppression system, it is determined whether the adjustment is in line with expectations based on the real-time offset.

[0104] In the event of inter-layer migration, a three-dimensional real-time suppression system is built to optimize the continuous development of inter-layer migration.

[0105] For example, the three-dimensional real-time suppression system is mainly composed of three core units: a flexible lateral constraint unit, an active pressure control unit, and a local temperature compensation unit.

[0106] It should be noted that the flexible lateral constraint unit directly counteracts the lateral resultant force caused by resin flow and curing shrinkage by applying targeted reverse constraint force; the active pressure control unit indirectly weakens the lateral thrust by adjusting the lamination vertical pressure and changing the resin lateral flow resistance and speed; and the local temperature compensation unit helps reduce the lateral stress during the flow process by finely adjusting the temperature of the strip area and regulating the resin melt viscosity and curing rate.

[0107] Flexible lateral constraint element:

[0108] The reverse constraint force is calculated by multiplying the total lateral driving force by the safety factor.

[0109] Understandably, the safety factor is set by those skilled in the art based on the material of the core board.

[0110] Active pressure control unit:

[0111] The target resin flow rate set in the system is obtained, and the difference between the target resin flow rate and the real-time flow rate of the resin in the lateral direction is calculated to obtain the target flow rate deviation.

[0112] The pressure adjustment value is obtained by multiplying the target flow velocity deviation by the pressure correction coefficient.

[0113] Preferably, the target resin flow rate is 0.1 mm / s, which balances resin filling efficiency and offset control;

[0114] Local temperature compensation unit:

[0115] The difference between the current resin melt viscosity and the target resin viscosity is calculated, and the temperature compensation value is obtained by multiplying the calculated difference result with the temperature correction coefficient.

[0116] Preferably, the target resin viscosity is 350 Pa·s;

[0117] It should be noted that the temperature correction factor was obtained by those skilled in the art through fitting analysis of historical pressing data;

[0118] The established three-dimensional real-time suppression system is input into the lamination equipment control system for real-time offset optimization;

[0119] It should be noted that the advantage of constructing a three-dimensional real-time suppression system is that, through the synergistic effect of flexible lateral constraint units, active pressure control units, and local temperature compensation units, a three-dimensional suppression system is formed, realizing real-time control of interlayer migration.

[0120] The process of determining whether the adjustment meets expectations based on the real-time offset of the core board acquired by the implemented 3D real-time suppression system is as follows:

[0121] Obtain the total duration of the pressing and heating phase;

[0122] The maximum allowable lateral displacement per unit time is obtained by calculating the ratio of the preset lateral feature limit to the total duration of the pressing and heating stage.

[0123] Collect the real-time offset after the implementation of the three-dimensional real-time suppression system;

[0124] Compare the real-time offset with the maximum lateral displacement feature;

[0125] If the real-time offset is greater than the maximum lateral displacement feature, it indicates that the optimization effect of the 3D real-time suppression system does not meet expectations.

[0126] If the real-time offset is less than or equal to the maximum lateral displacement feature, it means that the optimization effect of the three-dimensional real-time suppression system meets expectations.

[0127] Collaborative regulation module: If the expected results are not met, a retrospective analysis is performed on the three-dimensional real-time suppression system to identify the root cause of regulation failure; if the root cause of regulation failure is insufficient synergy of the three-dimensional real-time suppression system, then the three-dimensional real-time suppression system is coupled and optimized.

[0128] If the expected results are not met, the process of tracing back and analyzing the three-dimensional real-time suppression system to identify the root cause of the control failure is as follows:

[0129] The total lateral driving force, real-time flow velocity, and resin melt viscosity were collected after the three-dimensional real-time suppression system was adjusted.

[0130] The constraint efficiencies of the flexible lateral constraint unit, the active pressure control unit, and the local temperature compensation unit are calculated based on a three-dimensional real-time suppression system. The specific process is as follows:

[0131] Constraint efficiency of flexible lateral constraint elements:

[0132] The difference between the total lateral driving force before and after regulation is calculated, and the result of the difference calculation is compared with the reverse constraint force to obtain the constraint efficiency of the flexible lateral constraint unit.

[0133] Constraint efficiency of the active pressure control unit:

[0134] The first difference is obtained by calculating the difference between the target resin flow rate and the real-time flow rate after adjustment, and the second difference is obtained by calculating the difference between the target resin flow rate and the real-time flow rate before adjustment.

[0135] The constraint efficiency of the active pressure control unit is obtained by calculating the ratio of the first difference to the second difference.

[0136] Constraint efficiency of the local temperature compensation unit:

[0137] The first viscosity difference is obtained by calculating the difference between the regulated resin melt viscosity and the target resin viscosity, and the second viscosity difference is obtained by calculating the difference between the unregulated resin melt viscosity and the target resin viscosity.

[0138] The constraint efficiency of the local temperature compensation unit is obtained by calculating the ratio of the first viscosity difference to the second viscosity difference.

[0139] It should be noted that the physical meaning of the constraint efficiency of the flexible lateral constraint unit is the actual effect of the reverse constraint force applied by the unit on the total lateral driving force, directly reflecting whether the reverse constraint force can effectively offset the lateral resultant force caused by resin flow and curing shrinkage; the physical meaning of the constraint efficiency of the active pressure control unit is the actual effect of correcting the resin flow rate by adjusting the lamination vertical pressure, intuitively reflecting the sensitivity of pressure adjustment to the control of resin lateral flow resistance and speed; the physical meaning of the constraint efficiency of the local temperature compensation unit is the actual effect of correcting the resin melt viscosity by fine-tuning the temperature of the strip area, reflected in the proportion of the resin melt viscosity after adjustment approaching the target resin viscosity, the core reaction being the effectiveness of temperature change in controlling the resin melt state and curing rate.

[0140] For example, the constraint efficiency of the flexible lateral constraint unit, the constraint efficiency of the active pressure control unit, and the constraint efficiency of the local temperature compensation unit are compared with the control failure criteria, respectively.

[0141] If the constraint efficiency of all three units is greater than or equal to the control failure criterion, it indicates that the overall performance has not met expectations and is judged as insufficient coordination between units.

[0142] If the constraint efficiency of any of the three units is less than the control failure criterion, it means that a certain unit has not achieved the expected result, and that unit is the main source of control failure.

[0143] If the root cause of the control failure is insufficient synergy of the three-dimensional real-time suppression system, then the process of coupling optimization of the three-dimensional real-time suppression system is as follows:

[0144] If it is determined that there is insufficient coordination between units, the coordination between the flexible lateral constraint unit, the active pressure control unit, and the local temperature compensation unit is adjusted.

[0145] For example, the resin melt viscosity is first adjusted to the target resin viscosity by a local temperature compensation unit to create a stable viscosity environment for resin flow;

[0146] Then the active pressure control unit is activated to dynamically adjust the vertical pressure according to the target flow rate deviation and correct the resin lateral flow rate.

[0147] Finally, a reverse constraint force is applied by the flexible lateral constraint unit to counteract the remaining lateral driving force;

[0148] The technical solution of this embodiment is as follows: If interlayer misalignment occurs, a three-dimensional real-time suppression system is built to optimize the continuous development of interlayer misalignment; based on the real-time misalignment of the core board collected by the implemented three-dimensional real-time suppression system, it is determined whether the adjustment expectation is met; the interlayer misalignment is responded to in real time and its development is blocked through the three-dimensional suppression system, and the adjustment effect is verified simultaneously to ensure the assembly accuracy and stability of the core board and related structures; if the expectation is not met, the three-dimensional real-time suppression system is traced and analyzed to identify the root cause of the control failure; if the control failure root cause is the insufficient coordination of the three-dimensional real-time suppression system, the three-dimensional real-time suppression system is coupled and optimized; the root cause of the control failure is traced, and the coupling performance is optimized for the insufficient coordination of the system to continuously improve the lateral displacement control effect and stability of the three-dimensional real-time suppression system.

[0149] Example 3: Please refer to Figure 3 As shown, an optimization method for a signal transmission circuit board with a stripline layout according to the present invention includes the following steps:

[0150] Step 1: Integrate the resin parameters and stripline structure parameters to obtain the lateral force dataset; construct the resin lateral force coupling model based on the lateral force dataset;

[0151] Step 2: Based on the resin lateral force coupling model, a displacement prediction matrix is ​​constructed by superimposing curing shrinkage stress to obtain lateral displacement characteristic quantities; interlayer migration analysis is performed based on the lateral displacement characteristic quantities to determine whether interlayer migration has occurred.

[0152] Step 3: If interlayer misalignment occurs, a 3D real-time suppression system is built to optimize the continuous development of interlayer misalignment; based on the real-time offset of the core board acquired by the implemented 3D real-time suppression system, it is determined whether the adjustment is in line with expectations based on the real-time offset.

[0153] Step 4: If the expected results are not met, a retrospective analysis is performed on the three-dimensional real-time suppression system to identify the root cause of the control failure; if the root cause of the control failure is insufficient synergy of the three-dimensional real-time suppression system, then the three-dimensional real-time suppression system is coupled and optimized.

[0154] The foregoing has shown and described the basic principles, main features, and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of the invention. Various changes and modifications can be made to the invention without departing from its spirit and scope, and all such changes and modifications fall within the scope of the present invention as claimed. The scope of protection of the present invention is defined by the appended claims and their equivalents.

Claims

1. An optimized system for a signal transmission circuit board employing a stripline layout, characterized in that: The optimization system includes the following modules: Data coupling module: used to acquire resin parameters and strip wire structure parameters and integrate them to obtain the lateral force dataset; and to construct a resin lateral force coupling model based on the lateral force dataset; The process of constructing the resin lateral force coupling model is as follows: Calculate the lateral thrust area by multiplying the actual lamination height and the actual lateral length. Obtain the resin melt viscosity, real-time flow rate, lateral thrust area, and resin content correction factor; The real-time lateral thrust is calculated by multiplying the resin melt viscosity, real-time flow velocity, lateral thrust area, and resin content correction factor. Displacement analysis module: Based on the resin lateral force coupling model, a displacement prediction matrix is ​​constructed by superimposing curing shrinkage stress to obtain lateral displacement characteristic quantities; interlayer migration analysis is performed based on the lateral displacement characteristic quantities to determine whether interlayer migration has occurred; The process of constructing the displacement prediction matrix is ​​as follows: Obtain the curing shrinkage stress and the angle between the surface of the curing shrinkage stress and the lateral displacement direction of the core board, and calculate the sine value of the angle by performing a sine calculation on the angle. The lateral component force is obtained by multiplying the curing shrinkage stress, the sine of the included angle, and the lateral thrust area. The real-time total lateral driving force is obtained by summing the real-time lateral thrust and lateral component force. The obtained core board material, thickness, and stacking structure parameters were used to determine the lateral stiffness of the core board using the equivalent stiffness theory of laminates. The lateral displacement scale value at different sampling time points during the compression heating stage is obtained by calculating the ratio of the total lateral driving force to the lateral stiffness. The lateral displacement characteristic quantity is obtained by summing the lateral displacement scale values ​​at different acquisition time points during the compression and heating stage. System setup module: If interlayer misalignment occurs, a 3D real-time suppression system is built to optimize the continuous development of interlayer misalignment; based on the real-time offset of the core board acquired by the implemented 3D real-time suppression system, it is determined whether the adjustment is in line with expectations based on the real-time offset. The method for building a three-dimensional real-time suppression system is as follows: Obtain the safety factor, and calculate the reverse constraint force by multiplying the total lateral driving force by the safety factor; The target resin flow rate set in the system is obtained, and the difference between the target resin flow rate and the real-time flow rate of the resin in the lateral direction is calculated to obtain the target flow rate deviation. Obtain the pressure correction coefficient, and multiply the target flow velocity deviation by the pressure correction coefficient to obtain the pressure adjustment value; Obtain the temperature correction coefficient, calculate the difference between the current resin melt viscosity and the target resin viscosity, and multiply the calculated difference with the temperature correction coefficient to obtain the temperature compensation value. Collaborative regulation module: If the expected results are not met, a retrospective analysis is performed on the three-dimensional real-time suppression system to identify the root cause of regulation failure; If the root cause of the control failure is insufficient synergy of the three-dimensional real-time suppression system, then the three-dimensional real-time suppression system should be coupled and optimized. The process of performing the traceability analysis is as follows: The total lateral driving force, real-time flow velocity, and resin melt viscosity were obtained after the three-dimensional real-time suppression system was regulated. The difference between the total lateral driving force before and after regulation is calculated, and the result of the difference calculation is compared with the reverse constraint force to obtain the constraint efficiency of the flexible lateral constraint unit. The target resin flow rate is obtained, and the difference between the target resin flow rate and the real-time flow rate after adjustment is calculated to obtain the first difference. The difference between the target resin flow rate and the real-time flow rate before adjustment is calculated to obtain the second difference. The constraint efficiency of the active pressure control unit is obtained by calculating the ratio of the first difference to the second difference.

2. The optimized system for a signal transmission circuit board with a stripline layout according to claim 1, characterized in that: The actual horizontal length is obtained as follows: Obtain the horizontal length of the strip region and the designed horizontal length; The assembly deviation value is obtained by calculating the difference between the transverse length of the strip area and the designed transverse length. The actual transverse length is obtained by summing the assembly deviation value and the designed transverse length.

3. The optimized system for a signal transmission circuit board with a stripline layout according to claim 1, characterized in that: The method for obtaining the curing shrinkage stress is as follows: Obtain the real-time volume shrinkage rate, real-time elastic modulus, and constraint factor of the resin. The curing shrinkage stress is obtained by multiplying the volume shrinkage rate, elastic modulus, and constraint factor.

4. The optimized system for a signal transmission circuit board with a stripline layout according to claim 1, characterized in that: The method for determining whether the adjustment is in line with expectations is as follows: Obtain the total duration of the pressing and heating stage; calculate the maximum allowable lateral displacement per unit time by comparing the preset lateral feature limit with the total duration of the pressing and heating stage. The real-time offset after the implementation of the three-dimensional real-time suppression system is collected, and the real-time offset is compared with the maximum lateral displacement feature. If the real-time offset is greater than the maximum lateral displacement feature, it indicates that the optimization effect of the 3D real-time suppression system does not meet expectations. If the real-time offset is less than or equal to the maximum lateral displacement feature, it means that the optimization effect of the 3D real-time suppression system meets expectations.

5. An optimized system for a signal transmission circuit board with a stripline layout according to claim 1, characterized in that: The method for obtaining the constraint efficiency of the local temperature compensation unit in a three-dimensional real-time suppression system is as follows: Obtain the target resin viscosity, calculate the difference between the adjusted resin melt viscosity and the target resin viscosity to obtain the first viscosity difference, and calculate the difference between the unadjusted resin melt viscosity and the target resin viscosity to obtain the second viscosity difference. The constraint efficiency of the local temperature compensation unit is obtained by calculating the ratio of the first viscosity difference to the second viscosity difference.

6. The optimized system for a signal transmission circuit board with a stripline layout according to claim 1, characterized in that: The coupling optimization is performed as follows: The resin melt viscosity is adjusted to the target resin viscosity using a local temperature compensation unit. Then the active pressure control unit is activated to dynamically adjust the vertical pressure according to the target flow rate deviation and correct the resin lateral flow rate. Finally, a reverse constraint force is applied by the flexible lateral constraint unit to offset the remaining lateral driving force.

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