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Rigid-Flex PCB

Rigid-Flex PCB, also known as a rigid-flex circuit, is a hybrid board that combines Rigid Printed Circuit Boards (Rigid PCBs) and Flexible Printed Circuit Boards (Flex PCBs). A rigid-flex PCB typically includes one or more rigid sections, which are used in areas requiring additional support or component fixation, as well as one or more flexible sections, which can bend or fold to accommodate specific spatial requirements or dynamic movements.

This design makes rigid-flex PCBs particularly popular in electronic devices where space is limited, three-dimensional assembly is needed, or moving parts are required, such as smartphones, laptops, medical devices, and automotive electronics systems.

Rigid-Flex PCB Capabilities

No. Item Process Capability Parameter
1 PCB Type Rigid-flex PCB
2 Quality Grade Standard IPC 2 
3 Layer Count  2 layers, 3 layers, 4 layers, 6 layers, 8 layers
4 Material Polyimide Flex+FR4 
5 Board Thickness 0.4~3.2mm
6 Min Tracing/Spacing ≥4mil
7 Min Hole Size ≥0.15mm
8 Surface Finish Immersion Gold (ENIG), OSP, Immersion Silver
9 Special Specification Half-cut/Castellated Holes, Impendence Control, Layer Stackup

Flexible Part of the Rigid-Flex PCB 

no. Item Process  Capability Parameter 
1 Layer Count  1 Layer, 2 Layers, 4 Layers 
2 FPC Thickness 0.13mm, 0.15mm, 0.18mm, 0.2mm
3 Coverlay Yellow, White, Black, None
4 Silkscreen White, Black, None
5 Finished Copper 0.5oz, 1oz, 1.5oz, 2oz

Rigid Part of the Rigid-Flex PCB

No. Item Process  Capability Parameter 
1 Soldermask Green, Red, Yellow, White, Black, Blue, Purple, Matte Green, Matte Black, None
2 Silkscreen White, Black, None
3 Finished Copper 1oz, 2oz, 3oz, 4oz


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