Now I want to introduce the wholes thickness of FPCs. As is known to all, there are four kinds of FPCs(flexible circuits): single-sided FPC, double-sided FPC, dual access FPC and multiayer FPC. Let’s see the thickness of single-sided and double-sided FPC as examples:

(!) single-sided FPC

The constructure of single layer FPC is as follows:

25um+20um+35um+20um+25um=125um≈0.12mm

Note: the thickness of adhesive changes according to the thickness of Cu. For 1/2, 1/3 OZ Cu, we usually use 12um adhesive. But for 1OZ Cu, we have to use 20um adhesive.

That’s according to the common material. If we want the board to be thinner, we also can use the adhesiveless material to make the board about 0.60mm thick.

(2) double-sided FPC

Double sided FPC means there are two layer of traces in the FPC.

The constructure of double sided FPC is as follows:

25+12+35+12+25+12+35+12+25=193um≈0.20mm

Now you have an idea about the whole thickness of the FPCs, if you need more information, please contact us anytime.