Flexible printed circuit boards consist mainly of five parts:
Substrates: Commonly used materials are polyimide (PI).
Copper Foil: Divided into electrolytic copper and calendering copper two kinds.
The next agent: generally 0.5mil epoxy resin thermosetting adhesive. Protective film: for surface insulation.
Commonly used materials are polyimide (PI). Reinforcement: Strengthen the mechanical strength of flexible printed circuit boards.