What Are Some of the Most Common PCBA Substrates?

 

The FR4 substrate, also known as a veneer, is used in many PCBA plants. It is a fiberglass-reinforced plastic material commonly used in high-frequency and high-speed digital circuits. FR4 substrate is used widely in the production of PCBs because it has a high mechanical strength. Its insulation properties are also very good and can generally meet the needs for high reliability. FR4 comes in a variety of thicknesses, including 0.4mm and 0.6mm. These thicknesses can be used for a wide range of applications. The thicker the FR4 sheet, the stronger it is mechanically, and the more stable its electrical properties are. Aluminum substrates are used in PCBA production because of their heat dissipation properties, electrical conductivity, corrosion resistance and low cost. They also have good processing capabilities. The most common circuit boards that use aluminum substrates are those for LED lighting, high-power, high-frequency, and other circuits. The LED lighting circuit boards are mainly used because LED heat is high. Heat dissipation, which is needed to lower the temperature is achieved by using aluminum substrate.Aluminum substrates are usually thicker than 1.2mm or 1.5mm. Aluminum substrates are a good choice for circuit boards with high heat output. They can provide long-term stability and operation.

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