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Rigid Flex PCB

Layers 4
Board Thickness FPC: 0.1MM PCB:1.0MM
Material PI+FR4
Copper Thickness 1/2OZ
Surface Treatment Immersion nickel gold
Minimum Line Width/Line Spacing 0.1/0.1
PI Reinforcement Thickness /
Impedance /

 

Rigid-Flex Printed Circuit Board (RFPCB) refers to a hybrid circuit board that seamlessly integrates ​rigid and flexible substrates into a single, three-dimensional component, designed for applications requiring ​high-density interconnects, mechanical flexibility, and space optimization. Built on ​polyimide (PI) or aluminum substrates with ​0.1–0.3mm thickness, this PCB combines the ​durability of rigid sections (for component mounting) with the ​flexibility of flex regions (to conform to curved surfaces or dynamic bending), enabling compact designs in consumer electronics, aerospace, and medical devices

Key Features & Technical Specifications

  • Ultra-Thin & Flexible Design:
    • Supports ​90°–180° bending with a minimum bend radius of ​0.5mm, ideal for wearable devices (e.g., smartwatches) or curved automotive panels
    • IP67/IP68 certification ensures protection against moisture and dust in harsh environments
  • High-Density Interconnects:
    • Multi-layer routing (up to 12 layers) with ​0.03mm trace width allows complex circuitry for 5G communication, high-speed data transmission, and power distribution
    • Microvias (0.05mm) and ​blind/buried vias enable compact layouts for integrated components like sensors or antennas
  • Signal Integrity & Performance:
    • Controlled impedance (50Ω–100Ω) ensures minimal signal loss in high-frequency applications (e.g., mmWave 5G)
    • Thermal management through aluminum substrates (thermal conductivity up to ​2.0 W/m·K) and phase change materials (PCMs)
  • Manufacturing & Design:
    • Laser drilling and ​Automated Optical Inspection (AOI) ensure precision in via alignment and defect-free production
    • Stress-release transition zones (e.g., fan-out structures, serpentine patterns) prevent copper fatigue and extend dynamic bending lifespan

Applications

  1. Consumer Electronics:
    • Foldable smartphones, wearable fitness trackers, and compact cameras
  2. Aerospace & Automotive:
    • Aircraft avionics, satellite systems, and electric vehicle battery management modules
  3. Medical Devices:
    • Implantable devices (e.g., pacemakers) and portable diagnostic equipment requiring biocompatible, high-reliability circuits
  4. Industrial & IoT:
    • Harsh-environment sensors and industrial control systems with dynamic wiring needs

Advantages Over Traditional PCBs

  • Space & Weight Savings:
    • Reduces module volume by ​30–50% compared to rigid PCBs or wire harnesses, ideal for slim devices
  • Design Flexibility:
    • Enables 3D conformal packaging for curved casings or modular upgrades
  • Long-Term Reliability:
    • Tested for ​10+ years under ​AEC-Q101 automotive standards and ​IPC-6012 Class 3 durability

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