Rigid-Flex PCB Capabilities | Advanced PCB Manufacturing & Assembly - KKPCB
 

Rigid-Flex PCB Capabilities

KKPCB provides advanced Rigid-Flex PCB manufacturing and assembly services, combining the benefits of rigid and flexible boards. Our processes ensure high reliability, precise layer alignment, and long-term durability for complex electronic applications.
FPC / Rigid-Flex PCB Technical Parameters
Item Description Technical Specifications
Main FPC Material Brand Taiflex, Graceth, SY
PCB Material Brand SY, ITEQ, KB
Texture Texture Brand PI, PET
Coverlay Film Brand Taiflex, Graceth, SY
Layers 1-24 layers (sample), 1-12 layers (production)
Finished Board Thickness mm 0.25-6.0 mm (sample), Rigid-Flex PCB 0.25-6.0 mm
Minimum Line/Space mm 0.05 mm / 0.05 mm
Maximum Finished Board Size mm 230*450 mm
Finished Board Thickness Tolerance mm ±0.05 mm
PP Thickness μm 12.5 μm, 25 μm, 50 μm
Copper Thickness μm 12 μm, 18 μm, 36 μm, 70 μm
Stiffener Material Type FR4 / PI / PET / SUS / PSA
Surface Finish Type ENIG, Immersion Tin, OSP, Immersion Silver, Gold Plating
Minimum Hole Size mm Mechanical: 0.15 mm, Laser: 0.1 mm
Hole Tolerance mm NPTH: ±0.05 mm, PTH: ±0.075 mm
Coverlay Color Type Yellow, Black
PI Thickness mil 0.5, 0.7, 0.8, 1, 2 mil
Maximum FPCB Layers 1-8 layers
Minimum Finished Board Size mm 5 mm * 8 mm
Minimum Pad mm Inner Layer: 5 mil, Outer Layer: 4 mil
Minimum Stiffener Size mm 4 mm * 5 mm
Maximum Stiffener Size mm 32 mm * 32 mm
Stiffener Alignment Accuracy mm ±0.075 mm
Minimum Open Area Size mm 0.6 mm * 0.6 mm (stamped), 0.5 mm * 0.5 mm (precision stamping)
Minimum Distance Between Open Areas mm 0.5 mm (precision stamping), 0.2 mm (laser routing), 0.15 mm (normal drilling)
Coverlay Overflow (one side) mm Normal: 0.08-0.12 mm, Limit: 0.03 mm
Minimum Half-Hole Diameter on Gold Finger mm 0.25 mm, Normal: 0.3 mm
Rigid-Flex PCB: Peel Strength N 1.4 N
Rigid-Flex PCB: Flatness μm <15 μm before baking; <30 μm after baking
Rigid-Flex PCB: Thermal Shock 288℃ (3 times for 10 seconds)
Rigid-Flex PCB: Gold Wire Pull Strength g >6 g
Rigid-Flex PCB: Minimum Board Thickness mm FPCB 0.1 mm, 4 layers 0.3 mm, 6 layers 0.5 mm, 8 layers 0.6 mm, 10 layers 0.8 mm