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What are the solutions to problems with too fine apertures during PCB manufacturing?

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During the PCB manufacturing process, if you encounter the problem of too fine aperture, it may affect the installation of electronic components and the quality of electrical connections. Here are some solutions to the problem of too fine apertures:

Optimize Drilling Parameters: 

Adjust the parameters of the drilling machine, such as drill bit speed, feed rate and drilling depth, to ensure that the hole diameter meets the requirements.

Use a Larger Size Drill Bit: 

If the hole diameter is too fine due to improper selection of drill bit size, you can replace it with a larger size drill bit.

Improve Drilling Process: 

Optimize drilling process, such as using more precise drilling equipment, or improving cooling and lubrication conditions during drilling.

Use Laser Drilling: 

For PCBs that require very fine holes, consider using laser drilling technology, especially CO2 or UV laser drilling, which can create very fine holes.

Improve Drill Bit Quality: 

Use high-quality drill bits, they generally have better accuracy and durability.

Use Chemical Etching: 

In some cases, the desired pore size can be created through chemical etching methods.

Using Plasma Etching: 

Plasma etching technology can be used on PCBs with resin copper layers to remove material through an oxidation reaction to form holes.

Optimize PCB Design

Consider the aperture requirements during the manufacturing process during the design stage to avoid designing holes that are too thin.

Perform Aperture Compensation: 

Appropriate compensation of the aperture during design to compensate for possible shrinkage during the manufacturing process.


Using Photosensitive Aperture: 

Using photosensitive technology to create apertures, this method can provide higher aperture accuracy.

Improve Board Quality: 

Use high-quality boards to reduce possible problems during the drilling process.

Adopt Advanced Inspection Technology: 

Use technologies such as automated optical inspection (AOI) to ensure that the aperture meets specification requirements.

Implement Strict Quality Control: 

Implement strict quality control measures during the production process to detect and correct aperture problems in a timely manner.

Work with Suppliers: 

Work closely with PCB manufacturing suppliers to ensure they understand and can meet aperture requirements.

Use Build-up Layer Technology: 

If multi-layer interconnection is required, consider using build-up layer technology, such as B2it or NMBI, which can provide finer apertures.

Optimize the Number of Stacks: 

In mechanical drilling, optimizing the number of stacks can improve hole diameter accuracy.

Use Specialized Equipment: 

For particularly fine holes, specialized drilling or laser equipment may be required.

Perform Hole wall Treatment: 

Polish or coat the hole wall to improve hole wall quality and meet electrical performance requirements.

Adopt Advanced SimulationTechnology: 

Use simulation technology to predict the drilling process and optimize the hole diameter before production.

Continuous Improvement and Innovation: 

Continue to pay attention to and adopt new technologies and new processes to solve aperture problems.

Optimize the Drilling Process: 

By optimizing the drilling process, such as adjusting the sharpness of the drill bit, drilling speed, use of coolant, etc., the drilling quality can be improved and the problem of too fine apertures can be reduced.

Use Precision Drilling Equipment: 

Invest in more sophisticated drilling equipment, which typically provides greater drilling accuracy and repeatability.

Adopt Advanced Drilling Technology: 

For example, using ultrasonic-assisted drilling technology can reduce heat and friction during the drilling process, thereby improving the quality and accuracy of the hole.

Improve Plate Handling: 

Proper treatment of the plate before drilling, such as stress relief, can reduce deformation during drilling and ensure hole diameter accuracy.

Use Automation and Intelligence: 

Through automated drilling processes and intelligent control systems, human errors can be reduced and hole diameter consistency improved.

Carry Out Hole Wall Quality Inspection: 

Carry out quality inspection on the hole wall, such as hole wall roughness, hole wall verticality, etc., to ensure that the hole wall quality meets the requirements.


Use Non-contact Measurement Technology: 

Using non-contact measurement technology, such as optical measurement or laser measurement, the aperture can be measured more accurately.

Optimize Hole Design: 

During the design phase, hole shape and size can be considered to accommodate the constraints of the manufacturing process.

Use Advanced Materials: 

Use advanced PCB substrate materials, which may have better processing properties, thereby reducing the problem of too fine apertures.

Conduct Process Trials: 

Conduct process trials before mass production to determine the best drilling parameters and process conditions.

Work with Material Suppliers: 

Work with sheet suppliers to understand the properties of different materials and choose the materials that are best suited for the drilling process.

Adopt Customized Solutions: 

For special needs, customized solutions may be required, such as customizing drill bits with special specifications or developing new drilling processes.

Ongoing Technical Training: 

Ongoing technical training for operators to improve their skills and understanding of the process to reduce aperture issues.

Establish a Feedback Mechanism: 

Establish a feedback mechanism for quality issues. Once aperture problems are discovered, analyze and improve them immediately.

Use Advanced Production Management Software: 

Use advanced production management software to monitor and optimize the production process to ensure aperture quality.

Through these comprehensive measures, the problem of too fine PCB apertures can be more comprehensively solved, product quality can be improved, and design and functional requirements can be met.

Xinchenger Electronics Co., Ltd. has more than fifteen years of experience in PCB production and has complete PCB process equipment. It has Rogers high-frequency sheets, RO3000, series, RO4000 series, RO5000 series, etc. all year round, with dielectric constants ranging from 2.2-10.6. If you have any needs for PCB high-frequency boards, RF PCB and other circuit boards, please come to us for customized drawings. Welcome to inquire!

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