Rigid Material

How to choose material for PCB

In order to meet the different requirements of the PCB board, From material selection, board design, to anti-jamming performance requirements , all aspects should make a reasonable choice and design, most of the time, ordinary FR4 will be able to meet the design requirements, but Some special boards need special material , and many times customer have specified board material , but for some reason we can not buy these material directly . In fact, we have the same similar performance board material instead .

The choice of board material needs to consider the manufacturability of the factory , the availability of materials, the cost and the applicability of laws and regulations.

Key data of the board material performance

• Tg value (glass transition point temperature of the material)

• Td value or T260, T288 (thermal decomposition temperature of the material)

• Er value and Tanδ (Dk and Df) (dielectric loss and dielectric loss tangent),

• Halogen content (whether halogen-free material),

• Other considerations: CAF (anode conductive wire), IST, Q1000, UL grade, CTI (leakage tracking index), Water absorption ….

Recommended board material