How many degrees can PCB board withstand temperature?

The temperature resistance of PCB processing is affected by many factors, such as material, manufacturing process, circuit structure and so on. Among them, the material is the main factor affecting the temperature resistance of PCB board.

1. FR-4 materials

FR-4 is a glass fiber reinforced epoxy material commonly used in PCBA manufacturing. The temperature resistance of FR-4 materials is usually around 130°C, and exceeding this temperature will cause deformation or failure of the board.

Due to the advantages of low manufacturing cost, high cost performance, and good processability of FR-4 materials, they are also widely used in the high-end electrical industry and have been tested by long-term practice. However, for high temperature applications, the temperature resistance of FR-4 materials is not enough.

2. High temperature FR-4 material

High temperature FR-4 is a glass fiber reinforced epoxy material specially used in high temperature environment. Compared with FR-4 materials, high-temperature FR-4 materials have better temperature resistance and can withstand temperatures up to 150°C.

Although the manufacturing cost of high-temperature FR-4 is high, its reliability in high-temperature environment is far better than that of ordinary FR-4, so it has been widely used in the high-end electrical equipment industry.

3. Polyimide material

Polyimide is a high-performance insulation material with excellent high temperature resistance, chemical corrosion resistance, and electromagnetic wave interference resistance. It is one of the best high temperature resistant materials on the market, which can withstand high temperatures above 380 ℃, and a few brands of polyimide materials can even withstand high temperatures above 500 ℃.

At present, polyimide materials are mainly used in aerospace, military and high-precision temperature measurement equipment and other fields. Although polyimide materials are expensive, their reliability in high temperature environments is unmatched by other materials.

PCB factory board temperature resistance can reach up to 500 ℃ or more, depending on the material used in the board. In general electrical equipment and instrumentation, our commonly used materials are FR-4 or high temperature FR-4, which can meet most of the application requirements. However, in some special applications, such as aerospace, military and other industries, high-performance materials such as polyimide are required.

Therefore, when selecting the PCB board material, it is necessary to select the material type and temperature resistance level according to the actual application to ensure that the circuit board has good reliability and stability in a high temperature environment.