Rigid-Flex PCB

Rigid-Flex PCB — The Perfect Blend of Strength & Flexibility

Rigid-Flex PCB combines the benefits of both Rigid PCBs and Flexible PCBs, providing mechanical strength where needed and flexibility in areas that require motion or tight-space connections.

What is Rigid-Flex PCB

Rigid-Flex PCB is composed of two main parts:

• Rigid PCB Section – Provides hardness, support, and stable component mounting

• Flex PCB Section – Offers flexibility, bending ability, and compact connections

This hybrid structure is specially designed for:

• Space-saving layouts

• Complex internal interconnections

• Simplified assembly

• Enhanced product design efficiency

Materials Used

✅ Rigid Part: Typically made from FR-4

✅ Flex Part: Common materials include:

• • Polyimide (PI)

  • PEEK (Polyether Ether Ketone)

  • Conductive Polyester Films

Key Features of Rigid-Flex PCB

• Compact & Flexible – Perfect for space-constrained or foldable designs

• 3D Design Freedom – Enables three-dimensional layouts

• Superior Connectivity – High electrical reliability and minimal interconnect failure

• Simplified Assembly & Testing – Fewer cables, connectors, and steps

Challenges to Consider

While offering many advantages, Rigid-Flex PCBs also come with increased complexity and cost in manufacturing.

Reasons include:

• Precision layering and lamination processes

• Longer production cycles

• High-performance material requirements

Applications of Rigid-Flex PCB

Rigid-Flex PCBs are ideal for industries that demand compact size, reliability, and mechanical durability:

Specific Examples

📱 Mobile phones

🎛️ Keyboards (press key boards)

💻 Computers and LCD screens

🖥️ Motherboards and display panels

🎵 CD Walkman and portable players