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What factors should be considered when choosing the material for a PCB board?
Below factors should be considered when we choose the material for PCB:
(1)The material’s Tg value should be greater than the operation temperature;
(2) Low CTE material has good performance of thermal stability;
(3)Good thermal resistance performance: Normally PCBs are required to resist 250℃ for at least 50s.
(4) Good flatness;
(5) In consideration of the electrical properties, low loss/high permittivity material is used on high frequency PCB; Polyimide glass fiber substrate used for flexible PCB; Metal core is used when the product has strict requirement of heat dissipation.