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FR4 Boards Manufacturer.A leading FR4 boards manufacturer, renowned for its cutting-edge technology and unwavering commitment to quality, crafts superior circuitry solutions for diverse industries. With state-of-the-art facilities and a team of skilled engineers, they specialize in producing FR4 boards of unparalleled precision and reliability. Their boards meet stringent industry standards, ensuring optimal performance and durability in even the most demanding environments. Leveraging decades of expertise, they cater to clients worldwide, delivering innovative solutions that drive progress and redefine excellence in electronic manufacturing.

Alcanta offer FR4 Boards. More cheaper price. More Fast lead time. and More cheaper price. Alcanta PCB offer higher quality pcb from 2layer to 90 layers. the smallest via holes are 3 mil or 4 mil. the smallest line width are 2.2mil. line to line spacing are 2 mil.

FR4 boards
FR4 Boards Manufacturer

What are FR4 Boards?

FR4 circuit board is a printed circuit board made of FR4 material and is one of the common key components in modern electronic equipment. FR4 material is composed of fiberglass cloth and epoxy resin, which is laminated under high temperature and high pressure. This material is popular for its excellent properties and is widely used in the electronics industry.

First, FR4 circuit boards are world-renowned for their excellent insulation properties. As an insulating material, FR4 can effectively prevent short circuits between different parts of the circuit board, ensuring the stable operation of electronic equipment. This insulation property allows FR4 circuit boards to be safely used in various environments, including high temperature, high humidity and other harsh conditions.

Secondly, FR4 circuit boards have excellent mechanical strength. The addition of glass fiber gives the FR4 material excellent strength and hardness, allowing the circuit board to withstand mechanical vibration, impact and pressure, and protect electronic components from damage. This mechanical strength is an important factor in ensuring the stability and reliability of electronic equipment during transportation, installation and use.

In addition, FR4 circuit boards also have excellent heat resistance. As one of the main components, epoxy resin has good high-temperature resistance, allowing the FR4 circuit board to work stably for a long time in a high-temperature environment without being easily deformed or failing. This heat resistance makes FR4 circuit boards widely used in high temperature applications, such as automotive electronics, industrial control, etc.

Overall, FR4 circuit boards have become one of the most commonly used PCB materials due to their excellent insulation properties, mechanical strength and heat resistance. Its wide range of applications covers almost all electronic fields, providing important support for the performance and reliability of modern electronic equipment.

FR4 Boards design Reference Guide.

FR4 circuit board design is a critical step in ensuring functionality and performance of electronic devices. During the design process, many factors need to be considered to ensure the reliability and stability of the circuit board. First, the proper layout of components is crucial. Through precise component placement, the volume of the circuit board can be minimized, the integration of the circuit board can be improved, and the heat dissipation effect of the circuit board can be ensured. Reasonable layout can also reduce interference on the circuit board and improve signal integrity, thereby ensuring the stability and reliability of the circuit board.

Secondly, signal integrity needs to be considered in the design. In high-speed circuit design, signal integrity issues may lead to signal attenuation, timing deviation and other issues, affecting the performance of the entire system. Therefore, in the design of FR4 circuit boards, it is necessary to rationally plan signal lines to reduce signal transmission delay and distortion, improve the system’s anti-interference ability, and ensure stable signal transmission.

In addition, thermal management is also one of the key factors to consider in FR4 circuit board design. Electronic components generate a large amount of heat during work. If the heat cannot be effectively discharged, the temperature of the components will be too high, affecting their working stability and lifespan. Therefore, designers need to reasonably plan the location and quantity of heat dissipation components to ensure good heat dissipation and ensure the stability and reliability of the circuit board.

Finally, the manufacturability of the design is also an important factor to consider. Designers need to consider the manufacturing process of the circuit board and select appropriate materials and processes to ensure the achievability and manufacturability of the design. Reasonable design can reduce problems and errors in the manufacturing process, improve the manufacturing efficiency and quality of circuit boards, reduce production costs, and thereby increase the competitiveness and market share of products.

To sum up, FR4 circuit board design involves many considerations, including component layout, signal integrity, thermal management, and manufacturability. Through reasonable design and planning, the circuit board can be ensured to have good functionality and performance, and the product’s competitiveness and market performance can be improved.

What material is used in FR4 Boards?

The material used in FR4 circuit boards is FR4, a composite material composed of fiberglass cloth and epoxy resin. FR4 material is widely used in PCB manufacturing mainly because it has a range of superior properties that make it ideal for a variety of electronic applications.

Fiberglass cloth

Fiberglass cloth in FR4 provides excellent mechanical strength and stability. Fiberglass cloth is a strong material that can withstand various mechanical stresses without easily deforming or breaking. This makes FR4 circuit boards more durable during handling and operation, especially in high stress and high vibration environments. In addition, fiberglass cloth has good dimensional stability, which means it does not expand or contract significantly when temperature changes, ensuring the reliability and consistency of the circuit board.

Epoxy resin

Epoxy resin is another key ingredient in FR4 materials, which gives the circuit board excellent electrical insulation properties and heat resistance. Epoxy resin is a thermoset polymer that cures to form a hard, durable coating. This coating has very low electrical conductivity and can effectively prevent current leakage and short circuits, thereby protecting the normal operation of electronic components. In addition, epoxy resin also has high heat resistance and can remain stable in high temperature environments without easily decomposing or deforming. This makes FR4 circuit boards suitable for electronic devices that require high-temperature operation, such as power electronics and automotive electronic systems.

Electrical properties

The electrical properties of FR4 material are also one of the reasons for its popularity. It has low dielectric constant and low dielectric loss, ensuring high speed and low attenuation of signal transmission. This is particularly important for high-speed and high-frequency applications, such as wireless communications equipment and high-speed digital circuits. The electrical performance of FR4 circuit boards enables them to handle complex and high-density circuit designs without signal integrity issues.

Economic benefits

In addition to the above properties, FR4 materials also have lower cost advantages. Both fiberglass and epoxy resin are relatively cheap raw materials, and their manufacturing processes are mature and suitable for mass production. This allows FR4 circuit boards to maintain cost controllability while ensuring high performance. This is particularly important for consumer electronics manufacturers, who need to maintain the cost-effectiveness of their products in a highly competitive market.

Environmental tolerance

FR4 material also has excellent environmental resistance and can work stably in various harsh environments. It has good resistance to humidity, chemicals and ultraviolet rays, and will not be easily damaged by changes in the external environment. This makes FR4 circuit boards suitable for outdoor and industrial applications such as communication base stations and factory automation equipment.

To sum up, FR4 material has become one of the most popular materials in PCB manufacturing due to its excellent mechanical strength, electrical insulation properties, heat resistance, economic benefits and environmental resistance. It plays a key role in a variety of electronic applications, ensuring the reliability and performance of electronic devices.

What size are FR4 Boards?

FR4 circuit board sizes vary depending on the specific application and needs of the electronic device. They can range from small circuit boards used in cell phones and wearable devices to large circuit boards used in industrial equipment and telecommunications infrastructure. This versatility makes FR4 circuit boards ideal for a variety of electronic devices and systems.

Small FR4 circuit board

In the field of consumer electronics, FR4 circuit boards are widely used in the manufacture of small devices such as smartphones, tablets, smart watches and other wearable devices. These devices have strict requirements on the size and weight of circuit boards. Typical small FR4 circuit board dimensions range from a few millimeters to several centimeters. For example, an FR4 circuit board for a smartwatch might be only a few millimeters square, while a board for a smartphone might be several centimeters long. These small circuit boards must not only accommodate a variety of complex electronic components, but also must ensure the reliability and stability of signal transmission.

Medium size FR4 circuit board

Medium-sized FR4 circuit boards are commonly used in desktop computers, laptops, home entertainment systems, and other medium-sized electronic devices. The size of these circuit boards generally ranges from a few centimeters to tens of centimeters. For example, a desktop computer motherboard may be 30cm x 30cm in size, while a laptop motherboard is relatively smaller but still requires enough space for the CPU, memory, storage devices and other important components. Midsize FR4 circuit boards require a balance of size, performance and thermal performance to ensure reliable operation of the device under a variety of operating conditions.

Large FR4 circuit board

Large FR4 circuit boards are mainly used in industrial equipment, communication infrastructure, data centers and other fields. These applications typically require larger, more complex circuit boards to support high-power, high-frequency, and multi-functional electronic systems. Large FR4 circuit boards can exceed one meter in size. For example, circuit boards used in telecommunications base stations may need to support a large amount of signal processing and data transmission, and their dimensions are usually more than 60 cm × 60 cm. These circuit boards need to have high reliability, high temperature resistance, and anti-electromagnetic interference characteristics to adapt to harsh working environments.

Special sizes and customization

In addition to standard size FR4 circuit boards, many applications require customized sizes and shapes. Customized circuit boards can be cut and machined to meet specific device design requirements to meet special installation and functional requirements. For example, some medical equipment, aerospace equipment, and automotive electronic systems may require circuit boards with special shapes or multi-layer structures to maximize space utilization and functional integration.

FR4 circuit boards are highly flexible and customizable in size, making them suitable for a variety of applications from tiny portable devices to large industrial systems. This diversity not only meets the needs of different devices and systems, but also promotes the rapid development and widespread application of electronic technology. Whether in smart devices in daily life or in critical industrial and communication systems, FR4 circuit boards play an indispensable and important role.

The Manufacturer Process of FR4 Boards.

The manufacturing process of FR4 circuit boards involves multiple critical steps, each of which plays a vital role in the final quality and performance of the board. Below we will introduce these steps in detail to help you better understand the manufacturing process of FR4 circuit boards.

Substrate preparation

Substrate preparation is the first step in FR4 circuit board manufacturing. The FR4 substrate is made of fiberglass cloth impregnated with epoxy resin and then pressed into sheets at high temperatures. The boards are cut and cleaned to ensure they meet size and cleanliness requirements. The preparation process of the substrate directly affects the mechanical strength and electrical performance of the circuit board.

Layer alignment

In the manufacturing of multilayer circuit boards, layer alignment is critical. Multilayer boards are made of multiple layers of FR4 material and copper foil, and each layer must be accurately aligned to ensure the correct connection of the circuit. By using optical alignment systems and fixtures, manufacturers can ensure precise positioning between layers, preventing shorts or opens between layers.

Etching or printing of conductive paths

The formation of conductive paths is achieved through an etching or printing process. First, a layer of photoresist is covered on the copper foil, and a circuit pattern is formed on the resist through exposure and development techniques. The exposed copper foil is then chemically etched away, leaving behind the conductive path for the circuit. This process must be precisely controlled to ensure the accuracy and conductivity of the circuit.

Drilling component holes

After the conductive paths are formed, holes need to be drilled into the circuit board for mounting electronic components and making interlayer connections. Using a computer numerical control (CNC) drilling machine, holes of various diameters can be drilled accurately in circuit boards. These holes are then plated with copper to ensure a reliable electrical connection.

Welding mask applications

A solder mask (also called solder mask) is a protective coating applied to a circuit board. It prevents accidental short circuits while welding and protects conductive paths from the environment. Solder masks are usually green, but other colors are available. The solder mask is precisely applied to the circuit board through a screen printing or spraying process.

Component assembly

Component assembly is the process of mounting electronic components onto a circuit board. Components are placed precisely in designated locations through automated equipment such as Surface Mount Technology (SMT) machines and Through Hole Technology (THT) equipment. Soldering techniques include reflow soldering and wave soldering to ensure reliable connection of components to the circuit board.


Testing is the final step to ensure the functionality and reliability of the FR4 board. Manufacturers conduct a series of electrical and functional tests, including open and short circuit tests, signal integrity tests, and environmental stress tests. Through these tests, any potential defects can be found and fixed, ensuring the board’s performance in the final application.

By strictly controlling each manufacturing step, FR4 circuit boards can achieve high quality and reliability. These steps not only ensure the mechanical strength and electrical performance of the circuit board, but also improve its durability and stability in various application environments. Understanding these manufacturing processes is critical for electronics engineers and manufacturers to help optimize design and production processes and improve the quality and performance of the final product.

The Application area of FR4 Boards.

As a high-performance and multi-functional electronic component carrier, FR4 circuit boards play an important role in various industries. They are not only widely used in consumer electronics, but also show strong application potential in automobiles, aerospace, medical equipment, communications and industrial automation.

In the field of consumer electronics, FR4 circuit boards are widely used in smartphones, tablets, televisions, game consoles and other devices. These devices have strict requirements for circuit board size, performance and reliability, and FR4 circuit boards are ideal for meeting these requirements.

In the automotive industry, FR4 circuit boards are used in automotive control systems, vehicle entertainment systems, safety systems, etc. Automotive electronic equipment has extremely high requirements for high temperature resistance, vibration resistance, and high reliability. FR4 circuit boards can operate stably in harsh working environments, so they have been widely used in the field of automotive electronics.

In the aerospace field, FR4 circuit boards are used in aircraft control systems, communication equipment, navigation systems, etc. Aerospace equipment has extremely high requirements for lightweight, high strength, reliability, etc., and FR4 circuit boards can provide solutions that meet these requirements, so they are widely used in the aerospace field.

In the field of medical equipment, FR4 circuit boards are used in medical imaging equipment, diagnostic equipment, monitoring equipment, etc. Medical equipment has strict requirements on the accuracy, stability, and safety of circuit boards, and FR4 circuit boards can provide high-quality circuit connections to ensure the normal operation of the equipment.

In the fields of communication and industrial automation, FR4 circuit boards are used in communication base stations, industrial control systems, sensors, etc. These applications have extremely high requirements for the stability, anti-interference ability, and long-term reliability of the circuit board. FR4 circuit boards can meet these requirements and are therefore widely used in the fields of communications and industrial automation.

To sum up, FR4 circuit boards are widely used in various industries. Its excellent performance and reliability provide solid support for the manufacturing and operation of various electronic equipment and promote the development and progress of modern technology.

What are the advantages of FR4 Boards?

First of all, FR4 circuit boards are characterized by compact size. Due to the excellent properties of its materials and the high degree of controllability of the manufacturing process, FR4 circuit boards can achieve a high degree of integration and component density, thereby housing more electronic components in a relatively small space. This size advantage makes FR4 circuit boards particularly suitable for small electronic devices such as smartphones, tablets, and wearable devices.

Secondly, FR4 circuit boards have high reliability. FR4 material has excellent mechanical strength and heat resistance, can work stably in various environmental conditions, and can withstand the effects of vibration, shock and temperature changes on the circuit board. This high reliability makes FR4 circuit boards widely used in fields such as industrial control systems, aerospace equipment, and medical equipment.

In addition, FR4 circuit boards are easy to mass produce. This advantage comes from the high degree of automation of its manufacturing process and the feasibility of large-scale production. By using modern production equipment and processes, the manufacturing cost of FR4 circuit boards can be significantly reduced and can meet the needs of mass production.

Additionally, FR4 circuit boards reduce the risk of assembly errors. In the design and manufacturing process of FR4 circuit boards, strict quality control measures and automated production processes can be used to reduce the occurrence of human errors, thereby improving the quality and reliability of the circuit boards.

In addition, FR4 circuit boards can improve signal integrity. Due to its material’s low dielectric constant and low signal transmission loss, FR4 circuit boards are able to maintain signal stability and accuracy, ensuring that electronic devices perform at expected levels.

Finally, FR4 boards have excellent thermal performance. FR4 material has good thermal conductivity and can effectively disperse the heat generated by electronic components, thereby keeping the operating temperature of the circuit board within a suitable range, extending the service life of electronic equipment and improving its performance stability.

In summary, FR4 circuit boards have become an indispensable and key component in many electronic devices due to their compact size, high reliability, easy mass production, reduced assembly errors, improved signal integrity, and enhanced thermal performance.


How reliable are FR4 circuit boards?

FR4 circuit boards are known for their stable physical properties and excellent durability. Its material has good insulation properties and mechanical strength, and can withstand work under various environmental conditions. In addition, FR4 circuit boards undergo strict manufacturing and testing processes to ensure reliable quality. As a result, they exhibit excellent reliability in a variety of applications.

How to choose the appropriate FR4 material thickness?

The material thickness of FR4 circuit boards is usually determined based on the requirements of the specific application. Generally speaking, thinner boards are suitable for space-constrained applications, while thicker boards are suitable for applications requiring greater mechanical strength or thermal performance. Selecting the appropriate thickness requires consideration of the board’s mechanical support needs, thermal management requirements, and cost factors.

What are the design software for FR4 circuit boards?

There are many professional circuit board design software on the market to choose from, such as Altium Designer, Cadence Allegro, Mentor Graphics PADS, etc. These software provide powerful design tools and functions to meet the needs of different projects. Choosing the right design software requires taking into account factors such as design complexity, teamwork requirements, and personal preferences.

How to ensure the heat dissipation effect of FR4 circuit board?

Good heat dissipation design is crucial to ensure the stability and reliability of the circuit board. During the design process, you can use appropriate heat dissipation structures, increase heat dissipation holes, or add heat sinks to improve the heat dissipation effect. In addition, choosing the appropriate material and thickness can also affect the thermal performance of the circuit board.

How environmentally friendly are FR4 circuit boards?

FR4 circuit boards are usually made of halogen-free materials and meet environmental protection requirements. During the manufacturing process, energy-saving emission reduction measures and environmentally friendly materials can be adopted to reduce the impact on the environment. In addition, proper disposal and recycling



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