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2 Layer Rigid-Flex PCB Manufacturing Insights

2 layer rigid-flex PCBs combine a double-sided flexible polyimide circuit with selective rigid sections in a single board. Uses polyimide flex core with FR-4 or polyimide stiffeners. Supports coverlay on flexible areas and solder mask on rigid zones.

Typical Specification Range

28-4layerrigid-flexpcb-1-compress
Parameter Typical Range
Layer count2 layers
Material typePolyimide flex with selective FR4 rigid laminations
Surface finishENIG, OSP, Immersion Silver
ThicknessRigid board thickness 0.3mm - 1.6mm, FPC Thickness 0.08mm - 0.2mm
Solder maskFlexible solder mask and polyimide coverlay
Copper thickness0.5oz to 2oz
Special featuresSelective bonding, stiffeners, controlled bend areas, ZIF fingers

Manufacturing Process Insights

Lamination: FR4 rigid material is selectively bonded to polyimide flex core using no-flow prepreg. Precise registration and controlled pressure prevent wrinkles at transition zones.

Drilling and Plating: Mechanical drilling creates vias. Chemical copper deposition followed by electrolytic plating establishes interlayer connections. Plasma treatment improves hole wall adhesion.

Surface Finish and Coverlay: ENIG is applied for solderability. Polyimide coverlay protects flex circuits. Strict process sequencing minimizes thermal stress on flex material.

Risk Control: Cross-section inspection verifies bonding quality. CTE mismatch is managed through material selection and lamination profiles.

Manufacturing Order Profile

Order Quantity Order Proportion Estimated Price Level Typical Lead Time
Prototype (<=30 pcs) 66% From $215 From 13 days
Small volume (30-200 pcs) 19% From $315 From 15 days
Mass production (>200 pcs) 15% From $649 From 16 days

Manufacturing Challenges & Process Optimization

Transition Zone Delamination
Delamination occurs at rigid-flex junctions during thermal cycling or assembly.
CTE mismatch between FR4 and polyimide with insufficient resin flow creates weak bonds.
This defect lowers yield and causes intermittent opens that reduce product reliability.

Use stepped lamination with optimized pressure and temperature profiles.
Apply plasma treatment to flex surfaces before bonding.
Perform cross-section analysis on first articles to verify interface integrity.

View Exact Order Case

Copper Cracking in Bend Areas
Repeated flexing causes trace cracks in dynamic bend regions of 2 layer boards.
Electrodeposited copper and tight bend radii accelerate metal fatigue.
Cracks lead to early field failures and directly impact product service life.

Select rolled annealed copper and maintain proper bend radius ratios.
Add strain relief features and avoid vias in flex bend zones.
Conduct dynamic bend testing and use AOI plus continuity inspection.

View Exact Order Case

Design Considerations

Stackup Design
Define clear rigid and flex zones in planning. Maintain uniform dielectric thickness for impedance control. Minimize transition steps to improve manufacturability and reduce stress concentration.
Via Strategy
Material Selection
Surface Finish
design-rigid-flex-pcb-compress

Real Production Records

Order ID PCB Type Layers Dimensions Solder Mask Surface Finish Quantity Action
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Related Products

Common Applications

Consumer Electronics

AIVON's consumer electronics PCBs are precision-engineered for smartphones, tablets, laptops, and smart home devices. Using HDI design, fine-line etching, and multilayer fabrication, they deliver compact layouts, high-speed signal transmission, and strong reliability while meeting international quality and environmental standards.

Medical Devices

AIVON medical device PCBs are high-reliability boards designed for healthcare applications. Built with strict quality control, biocompatible materials, and precise manufacturing, they ensure safety and accuracy. Suitable for diagnostic equipment, patient monitoring, and wearable medical devices, AIVON PCBs meet ISO and IPC medical standards.

Industrial Control

AIVON engineers rugged PCBs for industrial control systems demanding unwavering reliability in harsh environments. Featuring high-Tg materials, heavy copper, and conformal coatings, our solutions withstand extreme heat and vibration. We ensure superior signal integrity and long-term stability for PLCs, robotics, and drives, maximizing your operational uptime.

View More Engineering Resources

Why Choose AIVON for 2 layer Rigid-Flex PCB

AIVON’s 2 layer rigid-flex PCBs bring the space-saving benefits of flexible circuits together with the strength of rigid boards. Designed for compact and demanding applications, they offer dependable electrical performance, excellent flexibility, and stable mechanical support. Our manufacturing expertise also enables customized designs and consistent quality from prototype to production.

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