Flying Tail Structure Rigid-Flex PCB

A Flying Tail Structure Rigid-Flex PCB is a specialized rigid-flex configuration characterized by a slender flexible circuit "tail" extending asymmetrically from one edge of the rigid main board (typically >50mm long). Key functional designs include:
1. Dynamic Cantilever Support: The flex tail bends/swings freely without connectors or cables;
2. Stress Relief: Tapered copper layers or stiffeners at the tail root disperse mechanical stress;
3. High-Density Interconnect: >40 lines/mm² signal routing in the tail for high-speed data transfer;
4. Space Penetration: The tail traverses confined paths (e.g., rotating shafts, sealed bulkheads) for cross-zone connectivity.
Commonly used in precision devices requiring repeated motion or spatial penetration, such as robotic joints, medical endoscopes, and missile fin actuators.

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Product Characteristics

1. Structure Design
Asymmetric Tail Configuration: Slender flex tail extending unilaterally (aspect ratio≥10:1)
Dynamic Cantilever Action: Free-end allows 360° articulation/linear motion
Root Stress Relief: Stepped copper + PI stiffeners (70% lower peak stress)

2. Electrical performance
HD Tail Routing: 50μm line/space (>40 lines/mm²)
Dynamic Signal Integrity: <±3% impedance drift @10GHz during motion
EMI Shielding: Copper mesh at tail edges (>30dB suppression)

3. Mechanical properties
High-Cycle Flexure: >200K bends @1mm radius (MIL-STD-202G)
Torsion Resistance: ±180° twist capability (45° cross-laminated copper)
Micro-Penetration: Tail thickness≤0.2mm, traverses Ø1.5mm channels

4. Reliability
Abrasion Resistance: 2μm parylene coating (5x wear life)

Chemical Proof: IP68 rating (silicone potting at root)
Temp Range: -65℃~+150℃ (18μm thickened copper)

Flying Tail Rigid-Flex PCB

Product Application Field

Industrial Automation

Wiring for robotic rotating joints
Slip ring circuits in CNC machines
Dynamic power/signal in 3D print heads

Medical Devices

Endoscope articulation section
Surgical robot instrument arms
Leads for implantable neurostimulators

Aerospace & Defense

Missile fin actuators
Rotary radar base feedthroughs
Cross-bulkhead wiring in deployable systems

Consumer Electronics

Hinge interconnects in foldable phones
360° rotating camera modules
Haptic feedback in VR controllers

Automotive

Powered seat adjustment
Steering column signal transfer
Flexible battery monitoring units

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