What are the commonly used types of PCBA substrates?

Date：2023-03-31 Views：

When we face electronic products, PCBA board is a very important part. And the single board itself has different types, and the characteristics and uses of these types are also different. This article will introduce common types and specifications of PCBA substrates.

1. FR4 substrate FR4 substrate is a very common type of single board in PCBA processing plants. It is a glass fiber reinforced plastic material commonly used in high-frequency circuits and high-speed digital circuits. FR4 substrate has excellent mechanical strength and high temperature resistance, so it is widely used in the design and manufacturing process of PCB boards. Its insulation performance is also very good, generally meeting the requirements of high reliability. The common thicknesses of FR4 are usually 0.4mm, 0.6mm, 0.8mm, and 1.0mm, which are suitable for different occasions. Generally speaking, the thicker the FR4 board, the higher its mechanical strength, and the thicker the board, the more stable its electrical properties will be.

2. Aluminum substrate The characteristics of aluminum substrates in PCBA production include heat dissipation, conductivity, corrosion resistance, low cost, and good processability. It is usually used for LED lighting, high-power, high-frequency and other circuit boards. LED lighting circuit boards are mainly due to the high heat generation of LEDs, which require heat dissipation to reduce temperature, and aluminum substrates have excellent heat dissipation performance in this regard. The thickness of aluminum substrate is usually 1.0mm, 1.2mm, 1.5mm, etc. Aluminum substrate is a very good choice for circuit boards with high heat generation, which can ensure the long-term operation and stability of the circuit board.

3. Among PCBA manufacturers, FR1 substrate is a cheaper substrate than FR4, but its electrical performance and mechanical strength are relatively low. Therefore, it is generally only used for low-end PCB circuit board design and manufacturing. Its common thicknesses include 1.0mm, 1.2mm, etc. Compared to FR1, its production cost is relatively low, making it a more economical choice.

4. High frequency board is a very special type of board that is very suitable for use in high-frequency circuit design due to its excellent characteristics for signal transmission. High frequency boards are commonly used in circuit applications such as RF circuits, microwave circuits, antenna circuits, etc. The common thickness of high-frequency boards is generally between 0.2mm and 0.8mm. Compared with other types of single boards, the cost of high-frequency boards is higher, but their electronic performance is excellent and the market demand is also high.

Summary: In the PCBA design and manufacturing process, the choice of substrate is very important. Different substrate types are suitable for different application scenarios, and the selection should be based on actual needs. FR4 board combines electrical performance and mechanical strength, and is a common substrate type, while aluminum substrate has outstanding performance in heat dissipation. High frequency boards are suitable for circuit boards that require high-frequency transmission applications, but their cost is relatively high compared to other boards.

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