Why is FR4 prioritized as the PCB base material?

Why is FR4 prioritized as the PCB base material?

FR4 is a common type of glass fiber-reinforced epoxy resin board, also known as a fiberglass board or glass fiber board.

As a manufacturing material:
The FR4 laminate material consists of layers of woven fiberglass cloth impregnated with epoxy resin, which is then cured under heat and pressure to form a solid and rigid board. The layers are typically bonded together with copper foils, creating conductive traces and pads for component attachment.

FR4 PCB can be manufactured in single-layer, double-layer, or multi-layer configurations, depending on the complexity of the circuit design and the requirements of the application. They offer good thermal conductivity, mechanical strength, and resistance to moisture and chemicals, making them suitable for various operating environments.
As a grading:
FR4 PCB refers to a type of printed circuit board (PCB) that is constructed using FR4 (Flame Retardant 4) laminate material. FR4 is a widely used epoxy-based fiberglass material known for its excellent electrical insulation and flame-retardant properties. It is the most common choice for manufacturing PCB due to its durability, stability, and cost-effectiveness.

FR4 PCB is widely used in various electronic devices and industries, including consumer electronics, telecommunications, automotive, aerospace, and industrial applications. They provide a reliable platform for mounting and interconnecting electronic components, ensuring proper electrical performance and signal integrity.

Overall, FR4 PCB is widely recognized and trusted for their reliability, cost-effectiveness, and versatility in the electronics industry.