Rigid-Flex Backplane

The Rigid-Flex Backplane PCB is a highly versatile interconnect solution that combines the durability of rigid boards with the flexibility of flex circuits. Designed for space-constrained, high-reliability applications, these PCBs enable complex three-dimensional packaging while maintaining superior electrical and mechanical performance.

Key Features of Rigid-Flex Backplane PCB

Hybrid Construction: Combines multiple rigid PCB sections with flexible polyimide-based interconnects, allowing 3D assembly and dynamic flexing.
Backplane Ready: Engineered for large, multi-connector backplane assemblies requiring maximum reliability.
HDI & High Layer Count: Supports up to 20+ layers with blind, buried, and microvias for dense signal routing.
Durability: Flex sections withstand repeated bending without compromising signal integrity.
Surface Finishes: Options include ENIG, ENEPIG, Hard Gold, Immersion Silver, HASL, and OSP for corrosion resistance and long connector life.
IPC Class 3 Compliance: Meets the most stringent reliability standards for aerospace, defense, and medical applications.

Technical Specifications of Rigid-Flex Backplane PCB

Layer Count: 4–20 layers (rigid-flex combination)
Base Materials: Polyimide flex materials, high-Tg FR4 rigid materials, copper core options available
Flex Cycle Rating: 100,000+ cycles (depending on design and bend radius)
Trace Width/Spacing: 3 mil / 3 mil
Surface Finish: ENIG, ENEPIG, Hard Gold (ideal for backplane connectors), HASL, Immersion Silver
Maximum Board Size: Rigid up to 16” x 22” with integrated flex sections
Operating Temperature: -55°C to +150°C

Applications of Rigid-Flex Backplane PCB

Backplane Assemblies: Ideal for large-scale high-pin-count connectors in networking and computing equipment.
Aerospace & Defense Systems: Withstands harsh environments and mechanical stresses.
Medical Devices: Enables miniaturized yet durable interconnect solutions.
Industrial Control Systems: Perfect for rugged applications requiring frequent handling and mechanical movement.
Telecommunications & Datacom: Supports complex routing in base stations, servers, and high-speed routers.

Benefits of Rigid-Flex Backplane PCB

The Rigid-Flex Backplane PCB delivers unparalleled design flexibility and reliability in demanding environments.

Reduces Interconnects: Eliminates bulky connectors and wiring harnesses, reducing assembly time and potential failure points.
Optimized Space Usage: Three-dimensional packaging capability makes it ideal for compact enclosures.
Enhanced Signal Integrity: Shorter, controlled impedance paths for high-speed data lines.
Rugged Performance: Designed to handle vibration, shock, and repeated flexing without degradation.

Accurate Engineering uses advanced sequential lamination and laser drilling processes to deliver the highest-quality rigid-flex assemblies.

Why Choose Accurate Engineering?

Expertise in Backplane Design: Extensive experience producing high-layer-count backplanes and rigid-flex hybrids.
Precision Manufacturing: State-of-the-art facilities ensure consistent quality and IPC Class 3 compliance.
Full Customization: Tailored solutions for unique electrical, thermal, and mechanical requirements.
Global Standards: RoHS-compliant materials and industry-leading quality assurance.

The Rigid-Flex Backplane PCB is the ultimate solution for engineers who need a durable, space-saving interconnect platform for mission-critical electronics.