PCB has been well known that is printed circuit board, It is the support of electronic components and the carrier of electrical connection of electronic components, also it is of the important components, but what is special PCBthe first need know the PCB materialnormal PCB material is FR4, FR4 is glass fiber epoxy resin copper clad plate, so we can say other material is special PCB, such asFR-1 -- phenolic cotton paper, the base material is commonly known as electric board (higher economic efficiency than FR-2)FR-2 -- phenolic cotton paperFr-3 - cotton paper, epoxy resinFR-5 -- glass cloth, epoxy resinFr-6 -- ground glass, polyesterG-10 - Woven glass, epoxy resinCEM-1 -- cotton paper, epoxy resin (flame retardant)Cem-2 -- cotton paper, epoxy resin (non flame retardant)CEM-3 -- Woven glass, epoxy resinCem-4 -- Woven glass, epoxy resinCem-5 -- Woven glass, polyestersAin -- aluminum nitrideSiC -- silicon carbidealso High Tg, High frequency, Rigid-Flex, Aluminum base, copper base, Thermo electric separation, and so on

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