Design method for preventing uneven oil plugging and oil explosion of solder mask hole plugging aluminum sheet of PCB (Printed Circuit Board)

Abstract

The invention relates to the technical field of PCB (printed circuit board) production, in particular to a design method for preventing uneven oil plugging and oil explosion of a solder mask hole plugging aluminum sheet of a PCB, which comprises the following steps: S1, scanning the PCB and identifying the aperture, namely scanning the PCB, and identifying the aperture of all holes needing to be plugged and the distribution of the aperture; s2, determining the drilling design of the aluminum sheet according to the aperture information identified in the S1; and S3, drilling operation is carried out on the aluminum sheet according to the drilling design of the aluminum sheet determined in the step S2. According to the method, the problems that the overall appearance and the electrical reliability of the PCB are affected due to the deep and shallow hole plugging effect due to the fact that various PCB factories do not have similar solder mask three-machine operation aluminum sheet design modes aiming at different hole diameters, oil explosion or poor oil leakage after high-temperature baking after production can be caused by hole opening printing ink protrusion, and the production cost is reduced are solved. And meanwhile, the problems that the PCB is easily broken, bent and scratched in the reworking process, and the secondary damage of the PCB is easily caused are solved.

Description

Technical Field

[0001] The invention relates to the technical field of PCB board production, and in particular to a design method for preventing uneven oil plugging and oil explosion of a PCB board solder-proof hole-plugging aluminum sheet. Background Art

[0002] PCB (Printed Circuit Board), whose Chinese name is printed PCB board, also known as printed circuit board, is the support body of electronic components and the carrier for electrical connection of electronic components. The wire tracks on the PCB board can connect the various components in the circuit to form a complete circuit system, making the assembly of electronic equipment simpler and more efficient. The insulating material on the PCB board can protect the components in the circuit from electromagnetic interference and other environmental factors, and improve the stability and reliability of the circuit. Some metal layers on the PCB board can play a heat dissipation role, helping the components in the circuit to disperse heat and prevent overheating damage. The PCB board can be used as a substrate for circuit components, providing them with stable mechanical support, and at the same time protecting the internal circuit components from external impact. The PCB board can be customized according to the designer's needs, including size, shape, circuit layout, etc., to meet the needs of different applications. Parts are concentrated on one side and wires are concentrated on the other side. Single-sided boards are usually simple to make and low in cost, but they cannot be applied to products that are too complex. Both sides have copper cladding and routing, and the lines between the two layers can be connected through vias to form the required network connection. It has more than three layers of conductive graphic layers and insulating materials in between, and the conductive graphics are interconnected as required. The multi-layer circuit board is the product of the development of electronic information technology towards high speed, multi-function, large capacity, small size, thinness and lightweight. It is a highly reliable and excellently flexible printed PCB board made of polyimide or polyester film as the substrate. It has the characteristics of high wiring density, light weight, thin thickness and good bendability. It is a common type of PCB board and is widely used in various electronic devices. The flexible circuit board and the rigid circuit board are combined together through processes such as pressing and other processes according to relevant process requirements to form a circuit board with FPC characteristics and PCB characteristics. PCB boards play a vital role in electronic products. With the continuous development of science and technology, the application scope of PCB boards will continue to expand and promote the emergence of more innovations and applications;

[0003] 1. At present, in order to ensure that all the plug holes in the holes are effectively plugged during the solder mask production of PCB boards produced by various PCB factories, to avoid the appearance of copper-exposed cavities in the holes, to prevent the subsequent acidic substances in the holes from causing hole breakage and subsequent poor startup, customers require the use of special plugging ink to plug the holes and require the production operation to be done in a plug-first-then-print manner. However, the drilling holes required for plugging on the actual board surface have various diameters. In the actual production process, the plugging effects of different hole diameters are different. Various PCB board factories do not have similar solder mask three-machine operation aluminum sheet design methods for different hole diameters, resulting in different plugging effects, affecting the overall appearance and electrical reliability of the PCB board.

[0004] 2. The ink protrusions at the orifices produced by this type of design in PCB factories will cause oil explosion or oil leakage after high-temperature baking after production. At the same time, it will cause scratches during production and transportation. The lost PCB boards will cause the parts to float during the PCBA client's component placement, resulting in poor contact or downtime, causing the market competitiveness of various companies' products to decline;

[0005] 3. During the rework process, it is very easy to cause the PCB board to break, bend, or scratch, which may cause secondary damage to the PCB board and lead to customer complaints;

[0006] In view of the above problems, a design method for preventing uneven oil plugging and oil explosion of a solder-proof plug hole aluminum sheet on a PCB board is provided. Summary of the invention

[0007] The purpose of the present invention is to provide a design method for preventing uneven oil plugging and oil explosion of a solder-proof aluminum sheet for plugging holes on a PCB board, so as to solve the problems raised in the above background technology. To achieve the above purpose, the present invention provides the following technical solution: A design method for preventing uneven oil plugging and oil explosion of a solder-proof aluminum sheet for plugging holes on a PCB board, comprising the following steps:

[0008] S1, PCB scanning and aperture identification, scanning the PCB to identify all apertures that need to be plugged and their distribution;

[0009] S2. Determine the drilling design of the aluminum sheet according to the aperture information identified in S1;

[0010] S3, performing a drilling operation on the aluminum sheet according to the drilling design of the aluminum sheet determined in S2;

[0011] S4. Prepare special plugging ink, apply the prepared ink evenly to the drilled holes of the aluminum sheet, cover the aluminum sheet on the PCB board, and use a scraper or pressure equipment to press the ink into the hole;

[0012] S5, baking the PCB board after plugging the holes to remove the volatile matter in the ink and promote the curing of the ink;

[0013] S6. Perform quality inspection on the PCB board after the via plugging is completed to check whether the via plugging effect is uniform and there is no oil explosion or oil leakage;

[0014] S7. Pay attention to protect the PCB from secondary damage such as scratches and collisions.

[0015] Preferably, the drilling design of the aluminum sheet includes:

[0016] When there is only one plug hole diameter in the board, the diameter of the hole drilled in the aluminum sheet is 2 mil larger on one side than the designed drilling diameter of the board surface.

[0017] Preferably, the drilling design of the aluminum sheet further includes:

[0018] When there are two plug hole diameters in the board, the small hole diameter of the aluminum sheet is 2 mil larger than the drill hole diameter designed for the board surface, and the large hole diameter is larger than the drill hole diameter designed for the board surface.

[0019] Preferably, the drilling design of the aluminum sheet further includes:

[0020] When there are three plug hole diameters in the board, the minimum hole diameter of the aluminum sheet is 2 mil larger than the designed hole diameter of the board surface, the middle hole diameter is the same size as the designed hole diameter of the board surface, and the large hole diameter is 2 mil smaller than the designed hole diameter of the board surface.

[0021] Preferably, the drilling design of the aluminum sheet further includes:

[0022] When there are four or more plug hole diameters in the board, the minimum hole diameter of the aluminum sheet is 2 mil larger than the designed hole diameter of the board surface, the middle hole diameter is the same size as the designed hole diameter of the board surface, and the last two large hole diameters are 2 mil smaller than the designed hole diameter of the board surface.

[0023] Preferably, the baking is carried out at a temperature of 300-320 degrees Fahrenheit for 2-3 minutes.

[0024] Preferably, the method for preparing the special plugging ink further comprises:

[0025] S1. Select the appropriate ink type according to the specific requirements of PCB aluminum sheet plugging;

[0026] S2. Mix the ink with the corresponding diluent and curing agent evenly according to the ink production ratio and process requirements;

[0027] S3. Use appropriate filtering equipment to filter the prepared ink to remove impurities and particles to ensure the purity of the ink.

[0028] Preferably, the ink types include photosensitive ink and thermosetting ink.

[0029] Preferably, the ink is mixed with the corresponding diluent and curing agent and stirred for 18-20 seconds at a temperature of 20-25 degrees Celsius and a rotation speed of 400-500 revolutions per minute.

[0030] Preferably, the diluent includes ethanol, isopropanol, and n-butanol;

[0031] The curing agent includes a cobalt drier, a manganese drier, a lead drier, and a UV curing ink.

[0032] Compared with the prior art, the present invention has the following beneficial effects:

[0033] The PCB board is scanned and the apertures are identified, and the apertures and their distributions of all the holes that need to be plugged are identified. The drilling design of the aluminum sheet is determined according to the aperture information identified in S1. The aluminum sheet is drilled according to the drilling design of the aluminum sheet determined in S2. A special plugging ink is prepared. The prepared ink is evenly applied to the drilled holes of the aluminum sheet. The aluminum sheet is covered on the PCB board. The ink is pressed into the holes by a scraper or a pressure device. The PCB board after the plugging is baked to remove the volatile matter in the ink and promote the curing of the ink. Conduct quality inspection to check whether the plugging effect is uniform and there is no oil explosion or oil leakage. Pay attention to protecting the PCB board from secondary damage such as scratches and collisions. This solves the problem that each PCB board factory does not have a similar solder mask three-machine operation aluminum sheet design for different apertures, resulting in different depths of plugging effects, affecting the overall appearance and electrical reliability of the PCB board. The protruding ink at the hole mouth will cause oil explosion or oil leakage after high-temperature baking after production. At the same time, it will cause scratches during the production and transportation process. It is very easy to cause the PCB board to break, bend, and scratch during the rework process, which is easy to cause secondary damage to the PCB board.

[0034] It can effectively prevent poor hole plugging during solder mask production, avoid copper-exposed cavities in the holes, prevent subsequent acidic substances in the holes from causing hole breakage, resulting in subsequent poor startup, and reduce the hole ink protrusions and oil explosion or oil leakage caused by the high-temperature baking of the PCB board after solder mask. At the same time, it can reduce scratches during production and transportation, prevent the missed boards from causing the client's PCBA client to float the parts and cause poor contact or downtime, resulting in a decline in the market competitiveness of various companies' products, and prevent the board from breaking, bending, and scratching during the rework process. Reduce secondary damage to the board, resulting in customer complaints and reducing manual inspection and maintenance. Missing or poor maintenance leaks to the client, resulting in poor appearance of the PCBA client plug-in or failure of board reliability, causing the entire board to be scrapped or the entire machine to be defective or scrapped, and increasing customer complaint costs. BRIEF DESCRIPTION OF THE DRAWINGS

[0035] Figure 1 It is a flowchart of the present invention. DETAILED DESCRIPTION

[0036] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technical personnel in this field without creative work are within the scope of protection of the present invention.

[0037] See also Figure 1 The present invention provides a technical solution: a design method for preventing uneven oil plugging and oil explosion of a solder-proof plug hole aluminum sheet on a PCB board, comprising the following steps:

[0038] S1, PCB scanning and aperture identification, scanning the PCB to identify all apertures that need to be plugged and their distribution;

[0039] S2, determining the drilling design of the aluminum sheet according to the aperture information identified in S1;

[0040] S3, performing a drilling operation on the aluminum sheet according to the drilling design of the aluminum sheet determined in S2;

[0041] S4. Prepare special plugging ink, apply the prepared ink evenly to the drilled holes of the aluminum sheet, cover the aluminum sheet on the PCB board, and use a scraper or pressure equipment to press the ink into the hole;

[0042] S5, baking the PCB board after plugging the holes to remove the volatile matter in the ink and promote the curing of the ink;

[0043] S6. Perform quality inspection on the PCB board after the via plugging is completed to check whether the via plugging effect is uniform and there is no oil explosion or oil leakage;

[0044] S7. Pay attention to protect the PCB from secondary damage such as scratches and collisions;

[0045] Through PCB board scanning and aperture identification, the PCB board is scanned to identify all apertures that need to be plugged and their distribution. According to the aperture information identified in S1, the drilling design of the aluminum sheet is determined. According to the drilling design of the aluminum sheet determined in S2, the aluminum sheet is drilled, and a special plugging ink is prepared. The prepared ink is evenly applied to the drilled holes of the aluminum sheet. The aluminum sheet is covered on the PCB board. The ink is pressed into the hole by a scraper or a pressure device. The PCB board after the plugging is baked to remove the volatile matter in the ink and promote the curing of the ink. The quality inspection of the PCB board after the plugging is carried out to check whether the plugging effect is uniform and there is no oil explosion or oil leakage. Pay attention to protecting the PCB board from secondary damage such as scratches and collisions. This solves the problem that each PCB board factory does not have a similar solder mask three-machine operation aluminum sheet design method for different apertures, resulting in different plugging effects, affecting the overall appearance and electrical reliability of the PCB board, and the protrusion of the hole mouth will cause oil explosion or oil leakage after high-temperature baking after production. At the same time, it will cause scratches during the production and transportation process, and it is very easy to cause PCB board breakage, bending, scratches during the rework process, which is easy to cause secondary damage to the PCB board. It can effectively prevent poor hole plugging during solder mask production, avoid copper-exposed cavities in the holes, and prevent subsequent acidic substances in the holes from causing hole breakage, resulting in subsequent poor startup, and reduce the hole ink protrusions and hole oil explosion or oil leakage caused by the high-temperature post-baking of the PCB board solder mask. At the same time, it reduces scratches during production and transportation, prevents the missed boards from causing the client's PCBA client to float when the parts are hit, causing poor contact or downtime, resulting in a decline in the market competitiveness of various companies' products, and prevents the board from breaking, bending, and scratching during the rework process. Reduce the secondary damage of the board, resulting in customer complaints, reducing manual inspection and maintenance caused by omissions or poor maintenance leaking to the client, resulting in poor appearance of the PCBA client plug-in or failure of board reliability, causing the entire board to be scrapped or the entire machine to be defective or scrapped, and increasing customer complaint costs.

[0046] In this embodiment, the drilling design of the aluminum sheet includes:

[0047] When there is only one plug hole diameter in the board, the diameter of the hole drilled in the aluminum sheet is 2 mil larger on one side than the designed drilling diameter of the board surface.

[0048] In this embodiment, the drilling design of the aluminum sheet also includes:

[0049] When there are two plug hole diameters in the board, the small hole diameter of the aluminum sheet is 2 mil larger than the drill hole diameter designed for the board surface, and the large hole diameter is larger than the drill hole diameter designed for the board surface.

[0050] In this embodiment, the drilling design of the aluminum sheet also includes:

[0051] When there are three plug hole diameters in the board, the minimum hole diameter of the aluminum sheet is 2 mil larger than the designed hole diameter of the board surface, the middle hole diameter is the same size as the designed hole diameter of the board surface, and the large hole diameter is 2 mil smaller than the designed hole diameter of the board surface.

[0052] In this embodiment, the drilling design of the aluminum sheet also includes:

[0053] When there are four or more plug hole diameters in the board, the minimum hole diameter of the aluminum sheet is 2 mil larger than the designed hole diameter of the board surface, the middle hole diameter is the same size as the designed hole diameter of the board surface, and the last two large hole diameters are 2 mil smaller than the designed hole diameter of the board surface.

[0054] In this embodiment, the baking is carried out at a temperature of 300-320 degrees Fahrenheit for 2-3 minutes.

[0055] In this embodiment, the method for preparing the special plugging ink further includes:

[0056] S1. Select the appropriate ink type according to the specific requirements of PCB aluminum sheet plugging;

[0057] S2. Mix the ink with the corresponding diluent and curing agent evenly according to the ink production ratio and process requirements;

[0058] S3. Use appropriate filtering equipment to filter the prepared ink to remove impurities and particles to ensure the purity of the ink.

[0059] In this embodiment, the ink types include photosensitive ink and thermosetting ink. Photosensitive ink refers to an ink that is sensitive to ultraviolet rays and can be cured by ultraviolet rays. The photosensitive ink will change color or cure under ultraviolet rays. The cured ink has good adhesion and stability. There are many ways to classify photosensitive inks, which can be divided into PCB photosensitive inks, mobile phone photosensitive inks, SMT photosensitive inks, etc. They are widely used in electronics, communications, signage and other industries. They can be divided into liquid photosensitive inks and solid photosensitive inks. Liquid photosensitive inks such as UV liquid photosensitive inks can be fully printed without a printing plate. They are suitable for the production of small batches, multiple varieties, personalized and high-precision graphic products. They can be divided into photosensitive etching inks, photosensitive solder mask inks, etc. Photosensitive etching inks are mainly used for the protection of circuit boards, hardware signage and other industries. The required graphics are produced by the principle of light imaging, and the etching liquid is used to etch the graphics out of the parts not covered by the ink. The preparation process of photosensitive inks involves a variety of raw materials and complex processes. Generally speaking, it is necessary to select suitable raw materials such as resin, pigment, photosensitizer, solvent, etc., and mix, grind and filter them in a certain proportion to obtain photosensitive ink that meets the requirements. The application process of photosensitive ink includes ink dilution, inking, ink drying, exposure, development and other steps. In specific applications, it is necessary to select suitable photosensitive ink and exposure parameters according to product requirements and process conditions to obtain the best printing effect and curing effect. Thermosetting ink is a special type of ink. It quickly solidifies the ink on the substrate by heating, thereby achieving high-quality printing effects. Thermosetting ink, also known as thermosetting ink, plastic ink or self-adhesive ink, is a resin-based non-solvent ink. It is mainly composed of PVC resin (or other resins such as epoxy resin, phenolic resin, etc., without solvent or water), plasticizer (such as phthalates), colorant, color fixer, stabilizer, thickener and other additives. Its solid content is usually high, generally up to more than 90%, or even 100%, and can achieve ideal printing effects with less ink volume, effectively reducing costs. Compared with traditional inks, thermosetting inks dry faster. Under heating conditions, the ink solidifies quickly, greatly shortening the printing cycle and improving production efficiency. After solidification, it can form a smooth and bright surface, improving the grade and beauty of the product. Because it does not contain solvents, the volatility at room temperature is extremely small. It will not dry at room temperature until it is heated to a certain temperature. It is very convenient to use and store. At the same time, its efficient printing process also helps to reduce energy consumption and reduce waste generation. It is suitable for a variety of substrates and printing methods, such as metal, plastic, glass, fabric (such as 100% cotton, cotton / polyester blends, polyester, dark and light colored cloth, denim, etc.), etc., and can meet the printing needs of different industries. The appearance is paste-like, thicker when left, and becomes thinner when stirred. Temperature affects its viscosity. In summer, the viscosity is low and the ink is relatively thin; in winter, it is the opposite.

[0060] In this embodiment, the ink is mixed with the corresponding diluent and curing agent and stirred for 18-20 seconds at a temperature of 20-25 degrees Celsius and a rotation speed of 400-500 revolutions per minute.

[0061] In the present embodiment, diluent includes ethanol, isopropanol, n-butanol, and ethanol can significantly reduce the viscosity of ink, making it easier to apply and print. This is the most direct effect of ethanol as a diluent, and ethanol acts as a solvent in ink, which helps pigment dispersion and maintains the stability of ink. It can help pigment to be evenly distributed in ink, prevent pigment agglomeration, thereby improving the uniformity and stability of ink, by reducing the viscosity of ink, ethanol can also improve the fluidity of ink, making it easier to pass through the nozzle or scraper of printing equipment, thereby ensuring the clarity and uniformity of the printed pattern, and the volatility of ethanol is higher, which can accelerate the drying speed of ink. This is crucial for improving production efficiency, especially in the printing process that needs to be dried quickly, ethanol also has bactericidal and antiseptic effects, can protect ink from being contaminated by microorganisms, and prolong the shelf life of ink, ethanol is an organic matter, and has a similar chemical structure to many components (such as resin, pigment, etc.) in ink. According to the principle of similar dissolving, ethanol can dissolve these components, thereby playing the role of dilution and solvent, ethanol has higher volatility, can evaporate rapidly at room temperature. This volatility helps to speed up the drying of the ink and take away some of the water and volatile substances in the ink, thereby further reducing the viscosity of the ink. When ethanol is mixed with the ink, a physical mixing effect occurs between them. This mixing effect allows the ethanol to be evenly distributed in the ink, thereby reducing the viscosity of the ink and improving its fluidity.

[0062] Curing agents include cobalt driers, manganese driers, lead driers, and UV curing inks. Cobalt driers can accelerate the oxidation reaction in the ink. Under the action of cobalt driers, the drying vegetable oil molecules in the ink can react with oxygen in the air faster to form stable oxides, thereby promoting the drying and curing of the ink. Cobalt driers can also accelerate the polymerization reaction in the ink. Polymerization reaction is the process in which ink molecules connect to each other to form macromolecules, which is essential for the curing of ink and the formation of a tough ink film. Cobalt driers can significantly accelerate this reaction process by providing active centers or reducing the activation energy of the polymerization reaction, thereby shortening the curing time of the ink. Cobalt driers can also significantly increase the drying speed of the ink. During the printing process, the ink needs to dry quickly to form clear patterns and lines. Cobalt driers can shorten the drying time of the ink by accelerating the oxidation and polymerization reactions in the ink, thereby improving printing efficiency, and can improve the gloss and hardness of the ink, making the printed product more beautiful and durable. The mechanism of action of the cobalt driers is mainly to react with the molecules in the ink through the active groups in its molecules to promote oxidation and polymerization reactions. At the same time, the cobalt drier can also react with the antioxidants in the ink to form a precipitate, eliminating the influence of the antioxidants on the curing of the ink.

[0063] The above shows and describes the basic principles, main features and advantages of the present invention. Technical personnel in this industry should understand that the present invention is not limited to the above embodiments. The above embodiments and descriptions are only preferred examples of the present invention and are not used to limit the present invention. Without departing from the spirit and scope of the present invention, the present invention may have various changes and improvements, which fall within the scope of the present invention to be protected. The scope of protection of the present invention is defined by the attached claims and their equivalents.

Claims

1. A design method for preventing uneven oil plugging and oil explosion of a solder-proof plug hole aluminum sheet on a PCB board, characterized in that: The steps include: S1, PCB scanning and aperture identification, scanning the PCB to identify all apertures that need to be plugged and their distribution; S2. Determine the drilling design of the aluminum sheet according to the aperture information identified in S1; S3, performing a drilling operation on the aluminum sheet according to the drilling design of the aluminum sheet determined in S2; S4. Prepare special plugging ink, apply the prepared ink evenly to the drilled holes of the aluminum sheet, cover the aluminum sheet on the PCB board, and use a scraper or pressure equipment to press the ink into the hole; S5, baking the PCB board after plugging the holes to remove the volatile matter in the ink and promote the curing of the ink; S6. Perform quality inspection on the PCB board after the via plugging is completed to check whether the via plugging effect is uniform and there is no oil explosion or oil leakage; S7. Pay attention to protect the PCB from secondary damage such as scratches and collisions.

2. The design method for preventing uneven oil plugging and oil explosion of a solder-proof hole-plugging aluminum sheet of a PCB board according to claim 1 is characterized in that: The drilling design of the aluminum sheet includes: When there is only one plug hole diameter in the board, the diameter of the hole drilled in the aluminum sheet is 2 mil larger on one side than the designed drilling diameter of the board surface.

3. The design method for preventing uneven oil plugging and oil explosion of a PCB solder plugging hole aluminum sheet according to claim 1 is characterized in that: The drilling design of the aluminum sheet also includes: When there are two plug hole diameters in the board, the small hole diameter of the aluminum sheet is 2 mil larger than the drill hole diameter designed for the board surface, and the large hole diameter is larger than the drill hole diameter designed for the board surface.

4. The design method for preventing uneven oil plugging and oil explosion of a solder-proof hole-plugging aluminum sheet of a PCB board according to claim 1 is characterized in that: The drilling design of the aluminum sheet also includes: When there are three plug hole diameters in the board, the minimum hole diameter of the aluminum sheet is 2 mil larger than the designed hole diameter of the board surface, the middle hole diameter is the same size as the designed hole diameter of the board surface, and the large hole diameter is 2 mil smaller than the designed hole diameter of the board surface.

5. The design method for preventing uneven oil plugging and oil explosion of a solder-proof hole-plugging aluminum sheet of a PCB board according to claim 1 is characterized in that: The drilling design of the aluminum sheet also includes: When there are four or more plug hole diameters in the board, the minimum hole diameter of the aluminum sheet is 2 mil larger than the designed hole diameter of the board surface, the middle hole diameter is the same size as the designed hole diameter of the board surface, and the last two large hole diameters are 2 mil smaller than the designed hole diameter of the board surface.

6. The design method for preventing uneven oil plugging and oil explosion of a solder-proof hole-plugging aluminum sheet of a PCB board according to claim 1 is characterized in that: The baking is carried out at a temperature of 300-320 degrees Fahrenheit for 2-3 minutes.

7. The design method for preventing uneven oil plugging and oil explosion of a solder-proof hole-plugging aluminum sheet of a PCB board according to claim 1 is characterized in that: The method for preparing the special plugging ink also includes: S1. Select the appropriate ink type according to the specific requirements of PCB aluminum sheet plugging; S2. Mix the ink with the corresponding diluent and curing agent evenly according to the ink production ratio and process requirements; S3. Use appropriate filtering equipment to filter the prepared ink to remove impurities and particles to ensure the purity of the ink.

8. The design method for preventing uneven oil plugging and oil explosion of a solder-proof hole-plugging aluminum sheet of a PCB board according to claim 7 is characterized in that: The ink types include photosensitive inks and thermosetting inks.

9. The design method for preventing uneven oil plugging and oil explosion of a solder-proof hole-plugging aluminum sheet of a PCB board according to claim 7 is characterized in that: The ink is mixed with the corresponding diluent and curing agent and stirred for 18-20 seconds at a temperature of 20-25 degrees Celsius and a rotation speed of 400-500 revolutions per minute.

10. The design method for preventing uneven oil plugging and oil explosion of a solder-proof hole-plugging aluminum sheet of a PCB board according to claim 7, characterized in that: The diluent includes ethanol, isopropanol, and n-butanol; The curing agent includes a cobalt drier, a manganese drier, a lead drier, and a UV curing ink.

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