In our daily life, people are in contact more or less every day, all kinds of electronic products, electronic devices, smart electronics, home appliances, smart phones, etc. made with PCB circuit boards!

But many friends who are in the electronics industry or PCB circuit board design engineers, hardware R&D engineers, etc. have not fully understood what PCB circuit board materials they need to design PCB circuit boards? Today I will give you all Friends "brain supplement" a brief introduction to the various substrate materials of the PCB circuit board.

　　The conventional main substrate of PCB circuit board:

　　 is divided into: 94HB, fireproof board (94VO, FR-1, FR-2), half glass fiber (22F, CEM-1 , CEM-3), full glass fiber (FR-4).

　　FR-1 Features:

　　 1. Halogen-free sheet material, good for environmental protection

　　2. High resistance tracking index (above 600 volts, special requirements are required)

　　3. Suitable punching temperature is 40～70℃

　　4. Bow curvature, twist rate is small and stable

　　FR-2 Features: Excellent resistance to leakage traces (above 600V)

　　 1. Low cost and wide range of use

　　2. Excellent humidity and heat resistance

　　3. Suitable punching temperature is 40～70℃

　　4. Bow curvature, twist rate is small and stable

　　5. Excellent dimensional stability

　　 CEM-3 features: excellent machinability, punching processability

　　 1. The electrical performance is equivalent to FR-4, the processing technology is the same as FR-4, and the drill bit wear rate is lower than FR-4

　　2. Multi-level resistance to trace leakage (CTI 175V, CTI300V, CTI 600V)

　　3. Meet the requirements of IPC-4101A

　　FR-4 features: halogen-free, bromine and chlorine content is less than 0.09%

　　 1. No antimony and red phosphorus, no toxic components remain during combustion

　　 2. The sheet material is harder than KB-6160