Rigid-flex board enjoy the advantage of both rigid FR4 PCB and flexible circuits. In rigid area, components will be soldered on, and whole board can be bendable at the flexible circuit area, so that to save space of assembly, make whole product into a small size but with tight trace designing.
Also people don't need to solder the FPC on PCB, or connect FPC on PCB via connector, furthermore, that plated through hole interconnection is more stable, firm than soldering or connector. So more and more rigid flex board circuit has been widely used in both military and civil area.
Double layers PCB is a pat
● Consumer Electronics
General specification for flexible & Rigid-flex printed circuit board
1. Single-sided flexible circuit board
2. Double-sided flexible PCB
Type: 2L Rigid-Flex Printed circuit board
Laminate: FR4 + Kapton
Board thickness: 1.6mm (0.062-inch)
Copper thickness: 35um (1oz) copper for all layers after finish
Solder resist: Black color
Finish: Immersion gold
Trace width/width: 0.13/0.13mm