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Multilayer PCBs Manufacturer. We have made 108 Layer HDI PCB with Mixed media materials, such as: High frequency, high frequency material, the PCB design had blind holes, buried holes. Some boards are used for testing.

Multilayer PCBs
Multilayer PCBs Manufacturer

What are Multilayer PCBs?

One of the core building components of contemporary electronic devices is Multilayer PCBs (Multilayer Printed Circuit Boards). This technology has become a key driver in the field of electronic engineering, offering the possibility of high integration and complexity of devices. So, what exactly are Multilayer PCBs?

Multilayer PCBs are a special type of printed circuit board that has more layers of structure than traditional single- or double-layer PCBs. In fact, they are composed of two or more conductive layers (usually copper foil) alternately superimposed on one or more insulating layers. This design allows more electronic components and circuits to be integrated into a relatively small space. The multi-layer structure allows circuits to be connected both horizontally and vertically, allowing for highly complex and dense designs while maintaining the board’s relatively small size.

The design of Multilayer PCBs can be said to be one of the driving forces for the development of modern electronic equipment. These boards provide powerful functionality and performance for a variety of devices. For example, multilayer PCBs are widely used in mobile phones, computers, communication equipment, medical equipment, etc. In these devices, Multilayer PCBs not only provide connections between electronic components, but also maximize the performance and stability of the device by optimizing layout and inter-layer connections.

However, the design and manufacturing of Multilayer PCBs is not simple. They require precise design planning and process control to ensure circuit integrity and reliability. Issues such as interlayer connections, signal integrity, and electromagnetic compatibility all need to be carefully considered and addressed. In addition, the manufacturing process of Multilayer PCBs also requires highly specialized equipment and technology, including steps such as interlayer stacking, chemical processing, drilling and pad coating.

Although the design and manufacturing process of Multilayer PCBs can present challenges, their advantages far outweigh these difficulties. Their high level of integration, small size and high performance make them ideal for modern electronic devices. As technology continues to advance, Multilayer PCBs will continue to play an important role in promoting the development and innovation of the electronics industry.

Multilayer PCBs design Reference Guide.

Multilayer PCBs (multilayer printed circuit boards) play a vital role in modern electronic design, and their design quality directly affects the performance and stability of electronic products. In this guide, we will introduce the design principles and best practices of Multilayer PCBs to help engineers better deal with complex design challenges.

Layout design

The layout design of Multilayer PCBs is the most critical step in the entire design process. During the layout design stage, engineers need to consider the location and connection relationships of various components, as well as the optimization of signal paths. Reasonable layout design can minimize signal interference and electromagnetic radiation and improve circuit performance and stability.

Interlayer connection

The key to the ability of Multilayer PCBs to achieve high-density circuit layout lies in its inter-layer connection design. Engineers need to accurately plan the signal and power connections at each layer to ensure the stability and reliability of signal transmission. In the inter-layer connection design, technologies such as vias and blind vias are usually used, combined with the layout of ground wires and power planes, to achieve optimal signal integrity.

Signal integrity

Maintaining signal integrity is a key challenge in the design process of Multilayer PCBs. Engineers need to consider factors such as the signal transmission rate, the impedance matching of the transmission line, and the interlayer coupling of the signal to ensure stable transmission of the signal across the entire circuit board. Using appropriate layout techniques and interlayer connection design can effectively reduce the occurrence of signal integrity problems.

Electromagnetic compatibility

In the design of Multilayer PCBs, electromagnetic compatibility (EMC) is a factor that cannot be ignored. Engineers need to take a series of measures to reduce the circuit’s sensitivity to external interference and ensure stable operation of the circuit in various working environments. This includes reasonable layout planning, ground and power plane design, and optimization of inter-layer connections.

Best Practices

During the design process of Multilayer PCBs, there are some best practices that can help engineers improve design efficiency and quality. This includes using advanced design tools and simulation software, maintaining close cooperation with PCB manufacturers, and conducting sufficient design verification and testing. At the same time, engineers should continue to learn and accumulate experience to continuously improve their design level.

By following the above design principles and best practices, engineers can design high-performance, stable and reliable Multilayer PCBs, providing strong support for the development and application of modern electronic products.

What material is used in Multilayer PCBs?

Multilayer PCBs (multilayer printed circuit boards) are the core components of modern electronic products, and their material selection is crucial. When designing and manufacturing Multilayer PCBs, the materials used must have high reliability, good electrical properties and adaptability to ensure stable operation and long-term reliability of the circuit board. The following are the key materials commonly used in Multilayer PCBs:


The base material of Multilayer PCBs is the main support material of the circuit board, which is usually composed of fiberglass composite materials (such as FR-4) or polyimide (PI). These substrates have excellent mechanical properties, dimensional stability and high temperature resistance, making them suitable for applications in a variety of environmental conditions.

Copper Foil

Copper foil is the key conductive material in Multilayer PCBs, used to form the wires and pads of the circuit. Copper foil has good electrical conductivity and weldability, and can provide stable signal transmission performance in high-frequency and high-speed circuits.

Insulation Layer

Insulating layers are used to isolate wires between different layers to prevent short circuits and interference. Common insulation materials include epoxy resin (FR-4 sheet), polytetrafluoroethylene (PTFE) and polyimide film (PI), etc., which have excellent insulation properties and chemical resistance.

Solder Mask

Solder mask is used to cover the pad area of ​​a circuit board to prevent solder shorts and oxidation. Common solder resist materials include green, red, blue and black photo-curable solder resist inks. The color and photo-curing method can be selected according to actual needs.

Substrate Material

The substrate material is used to support and reinforce the structure of Multilayer PCBs, usually using materials such as polyimide film (PI), polytetrafluoroethylene (PTFE) or polyimide resin (FR-4), which have high strength and low dielectric constant and good dimensional stability.

Material selection for Multilayer PCBs is critical to the board’s performance and reliability. Through reasonable material selection and process control, Multilayer PCBs can be ensured to have excellent electrical properties, good thermal stability and long-term reliability, thereby meeting the needs of various application scenarios.

What size are Multilayer PCBs?

The dimensions of Multilayer PCBs are customized according to the needs of specific applications. They can range from very small, such as tiny circuit boards used in smartphones or handheld devices, to very large, such as large circuit boards used in industrial control systems or communication base stations. Therefore, Multilayer PCBs are available in a very wide range of sizes.

In small electronic devices, Multilayer PCBs usually come in compact sizes to maximize space saving and achieve high integration. For example, Multilayer PCBs in smartphones typically have dimensions of a few square centimeters but are capable of housing hundreds of electronic components and complex circuit structures.

In large electronic systems, Multilayer PCBs may be very large to accommodate more electronic components and complex circuits. For example, Multilayer PCBs used in industrial automation systems or power control systems may have dimensions of tens or even hundreds of square meters to accommodate the needs of large equipment.

In addition, the size of Multilayer PCBs is also limited by manufacturing processes and technologies. As manufacturing technology advances, PCB manufacturers are able to achieve higher precision and smaller sizes, driving further reduction in the size of Multilayer PCBs.

Overall, Multilayer PCBs are available in a wide range of sizes and can be customized according to the needs of specific applications. Whether it is a miniature electronic device or a large electronic system, Multilayer PCBs can provide the required electrical connections and functional implementation, providing strong support for the development of modern electronic products.

The Manufacturer Process of Multilayer PCBs.

When it comes to the manufacturing process of Multilayer PCBs, the steps and processes involved are quite complex and sophisticated. The following is an extension to the Multilayer PCBs manufacturing process:

Stacking between layers

The manufacturing of multilayer PCBs usually starts with inter-layer stacking. At this stage, thin sheets of material (usually fiberglass cloth) and pre-laid copper foil are layered together. The accuracy of this process is critical to the performance of the final PCB. The layout of each layer and the design of connections between layers must be carefully planned to ensure the accuracy and reliability of the circuit.

Copper foil etching

Once the interlayer stacking is complete, the next step involves etching the copper foil. This process uses chemicals to etch away unwanted portions of the copper foil, leaving only the pre-designed circuit pattern. This delicate etching process requires precise control of temperature, time and chemical concentration to ensure the quality of the final circuit.

Chemical treatment

After etching, the PCB needs to go through a series of chemical treatment steps to remove any remaining dirt and residue and ensure the surface is smooth and clean. This process includes steps such as cleaning, pickling, passivation and anti-corrosion treatment to prepare for subsequent processing.


Drilling is a critical step in the manufacturing process of Multilayer PCBs. At this stage, the PCB needs to be drilled through pre-designed holes to install electronic components. The precision and accuracy of this process are critical to the performance of the final product.

Immersion gold and solder mask

Once the circuit pattern and hole locations on the PCB are prepared, the next step is immersion gold and solder mask. Immersion gold is used to improve the reliability and conductivity of soldering, while solder mask is used to protect the PCB surface from environmental factors and provide additional mechanical strength and durability.

Pad coating and assembly

Finally, the PCB requires pad coating and assembly. This process involves soldering electronic components to a PCB and conducting final testing and quality checks. Only through strict testing and quality control can the performance and reliability of the final product be ensured.

To sum up, the manufacturing process of Multilayer PCBs is a complex and precise project involving multiple steps and processes. Only through precise control and strict quality management can Multilayer PCBs of high quality and reliability be produced.

The Application area of Multilayer PCBs.

As an indispensable component of modern electronic equipment, Multilayer PCBs (multilayer printed circuit boards) are widely used in various fields. Their high degree of integration and flexibility make them play a key role in various application scenarios.

Communication field

In the field of communication, especially in the field of wireless communication, Multilayer PCBs are the core supporting various communication equipment. From smartphones to base stations to satellite communication systems, Multilayer PCBs provide stable electrical connections and high-frequency signal transmission to ensure the performance and reliability of communication equipment.

Computer hardware

In the field of computer hardware, Multilayer PCBs undertake the task of connecting and supporting various computer components. From personal computers to servers, Multilayer PCBs provide high-speed data transmission and support for complex circuits, providing a solid foundation for the operation of computer systems.

Medical instruments

In the field of medical devices, Multilayer PCBs are widely used in various medical devices, such as pacemakers, medical imaging equipment, and implantable medical devices. Its high degree of integration and reliability make it an indispensable part of medical equipment, ensuring the performance and safety of medical equipment.


In the aerospace field, Multilayer PCBs are widely used in equipment such as aircraft, spacecraft, and satellites. Its lightweight and high reliability make it the first choice for aerospace electronic systems, ensuring the successful execution of aerospace missions.

Military equipment

In the military field, Multilayer PCBs are core components of various military electronic equipment. From communication systems to navigation equipment, Multilayer PCBs provide a high degree of integration and stable performance, ensuring the reliable operation of military equipment in various harsh environments.

Overall, Multilayer PCBs play a vital role in various application fields, and their high degree of integration and flexibility make them a core component of modern electronic equipment. With the continuous advancement of technology, we believe that Multilayer PCBs will play a more important role in the future electronic field and promote the development and innovation of the industry.

What are the advantages of Multilayer PCBs?

Multilayer PCBs are an indispensable key component in modern electronic equipment, and their applications in various fields are becoming more and more extensive. This multi-layer printed circuit board has many advantages over traditional single- or double-layer PCBs, not only in performance, but also in design flexibility and production efficiency.

First, one of the most significant advantages of Multilayer PCBs is their higher level of integration. Compared with single-layer or double-layer PCBs, Multilayer PCBs can accommodate more circuits in a smaller space. This high-density layout can not only reduce the size of electronic products, but also improve the performance and stability of the circuit. By arranging signal, power and ground layers in multiple layers, signal interference and crosstalk can be effectively reduced, and the anti-interference ability of the circuit can be improved, thereby ensuring the stable operation of electronic products.

Secondly, Multilayer PCBs also have better signal integrity. Because the distance between the signal layer and the power layer is closer, the signal transmission speed is faster and more stable and reliable. This design can effectively reduce signal transmission delay and distortion, and improve signal quality and reliability. In high-speed electronic products, such as communication equipment and computer hardware, this advantage is particularly important to ensure fast and accurate data transmission.

In addition, Multilayer PCBs have smaller size and weight. Through layer stacking and compact layout, the size of the circuit board can be minimized, saving space and material costs. This is particularly important for portable electronic devices and micro electronic products, which can meet users’ needs for thinness and miniaturization and improve the competitiveness and market share of products.

Finally, Multilayer PCBs also have better production efficiency. Although its manufacturing process is more complex than single-layer or double-layer PCBs, multiple functions can be implemented on the same circuit board, which greatly simplifies the assembly and connection steps, improving production efficiency and process stability. This is especially important for high-volume production and fast delivery requirements, which can reduce production costs and improve production efficiency.

To sum up, Multilayer PCBs have become one of the indispensable key technologies in the design and manufacturing of modern electronic products due to their advantages such as high integration, superior signal integrity, small size, lightweight and high production efficiency. With the continuous advancement of science and technology and the continuous expansion of application fields, the advantages of Multilayer PCBs will be further brought into play and demonstrated, promoting the continued development and innovation of the electronics industry.


What is the difference between Multilayer PCBs and ordinary single or double layer PCBs?

Multilayer PCBs have higher integration and better performance than ordinary single-layer or double-layer PCBs. They enable more complex designs and higher circuit density by arranging circuits on multiple levels, allowing electronic products to achieve more functions in a smaller space.

Is the design and manufacturing process of Multilayer PCBs more complex?

Yes, the design and manufacturing process of Multilayer PCBs is more complicated than that of single-layer or double-layer PCBs. Since signal integrity, inter-layer connections, electromagnetic compatibility and other factors need to be considered between multiple layers, the design and manufacturing process requires more process and technical support to ensure the performance and reliability of the circuit.

What are the application fields of Multilayer PCBs?

Multilayer PCBs are widely used in communication equipment, computer hardware, medical equipment, aerospace and military equipment and other fields. Due to their high density and high performance characteristics, Multilayer PCBs have become an indispensable component in these fields, driving technological development and innovation.

What are the advantages of Multilayer PCBs?

Multilayer PCBs offer many advantages over single- or double-layer PCBs, including higher integration, better signal integrity, smaller size and higher performance. They can accommodate more circuits in a smaller space and implement more complex functions to meet the needs of different applications.



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