Single-Sided
Single Side board is most basic type of FPC, and applicative kinds are also most popular. Due to the characteristic of high flexibility, Single-sided FPC could connect PCB and parts.
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Double-sided
Double-sided FPCs are composed of top and bottom patterning, and the two layers of patterning are connected with through holes. This kind of FPC can be designed to lay more circuits in limited area than Single-side FPCs.