PCB Blog - Material of PCB

The material of a PCB depends on the special requirements and usage environment of the product. Different materials have different characteristics and are suitable for different types of electronic products. Choosing the appropriate PCB material is crucial for the performance and reliability of the product.

Commonly used materials for manufacturing PCBs

1. FR-4

This is one of the most commonly used materials in PCBs. It is a glass-reinforced epoxy laminate. The epoxy resin used is flame retardant and waterproof. It provides a good strength-to-weight ratio. This material has a high tensile strength.

2. PTFE

Polytetrafluoroethylene is a plastic material that does not provide any resistance and is therefore used for high-speed and high-frequency applications. PTFE is very flexible, making it very valuable in applications with strict tolerances. It is also very lightweight, allowing it to be used in various industries. It also has flame retardancy, high physical strength, temperature stability, and versatility in applications.

3. Metals

Traditional materials such as copper, aluminum, and iron are still used in PCBs. These materials allow the use of surface mount technology to integrate components. They also provide mechanical durability. Therefore, the product life of metal-based PCBs is much longer.

4. Resin

An epoxy resin material commonly used in the PCB industry, thermally cured materials can produce polymer polymerization reactions. Resin has excellent electrical insulation and can serve as an adhesive between copper foil and reinforcement (glass fiber cloth), with characteristics such as electrical resistance, heat resistance, chemical resistance, and water resistance.

5. Aluminum substrate

The main component of the aluminum substrate is aluminum, which is composed of copper skin, an insulation layer, and an aluminum sheet. Aluminum substrate has excellent heat dissipation function, so it is now widely used in the LED lighting industry.

Common PCB material brands

1. Rogers material

Rogers high-frequency pcb material is a modern and high-performance composite material. It is made of glass fiber as the reinforcing material and aromatic polyimide resin as the basic material through multi-layer composite processing. Due to its excellent dielectric properties, high-frequency signal transmission ability, and mechanical strength, Rogers high-frequency circuit boards have gradually replaced traditional organic polymer materials and ceramic resin matrix composites.

Characteristic

1) Excellent dielectric properties. Rogers high-frequency PCB materials have excellent high-frequency performance and high dielectric strength. It has advantages such as low loss and low phase shift.

2) Good electromagnetic performance. The Rogers high-frequency circuit board material has excellent shielding performance and effectively prevents interference.

3) High mechanical strength. Rogers high-frequency circuit board materials have high strength and toughness, ensuring their long-term stability.

4) High reliability. Rogers high-frequency PCB materials have a long service life, excellent antioxidant performance, and can maintain stability for a long time.

Application area 

Rogers' high-frequency circuit board materials have a wide range of applications, including communication, medical, military, satellite communication, aerospace, automotive electronics, and other fields. In the field of communication, it is widely used in core components such as antennas, transceiver modules, RF power amplifiers, etc; In the military industry, Rogers high-frequency circuit board materials are used for high-end equipment such as radar and satellite navigation.

2. Shengyi Technology

Shengyi Technology is one of the leading enterprises in PCB materials. The company mainly produces high-performance PCB board materials, including FR4, high TG FR4, aluminum substrates, etc. Its products are widely used in fields such as telecommunications, computers, consumer electronics, automotive electronics, and LED lighting.

3. FR4 is a strong PCB material enterprise, whose main products are high-performance functional materials, including high-frequency circuit boards, microwave circuit boards, RF circuit boards, etc.

For the selection of PCB material, it is necessary to consider the electrical characteristics, thermal conductivity, mechanical strength, and other requirements of the board, and make choices based on different application scenarios.