The PCBSYNC Flex-Rigid Hybrid PCB with a combined ENIG and selective hard gold finish provides advanced interconnectivity for complex, space-constrained electronic systems. This specialised board integrates the structural stability of standard FR4 rigid layers with the dynamic bendability of polyimide flexible circuits. By deploying an Electroless Nickel Immersion Gold (ENIG) finish across standard component pads, the board ensures exceptional surface flatness for fine-pitch SMT component placement. Concurrently, a selective hard gold plating is applied to insertion fingers and high-wear contact points, ensuring long-term mechanical durability and minimal contact resistance across multiple mating cycles.
Key Features of the Flex-Rigid Hybrid PCB
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Dual Surface Finish: ENIG ($3\text{–}5\ \mu\text{in}$ Au over $100\text{–}150\ \mu\text{in}$ Ni) for flawless soldering, combined with Selective Hard Gold ($\ge 30\ \mu\text{in}$ Au over Ni) for robust wear resistance.
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Layer Count Options: From 4-layer to 20-layer hybrid configurations.
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Base Materials: High- $T_g$ FR4 combined with polyimide (PI) adhesive-less core layers.
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Controlled Impedance: Tolerances maintained within $\pm 10\%$ for high-speed signal integrity.
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Manufacturing Standards: Fully compliant with IPC-A-600 and IPC-6013 Class 2 and Class 3 specifications.
Applications
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Aerospace & Defence: Mission-critical avionics, flight control systems, and compact telemetry modules.
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Medical Devices: Multi-axis robotic surgical equipment, internal imaging sensors, and patient monitoring wearables.
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Industrial Automation: High-vibration robotic joints, multi-planar control units, and sensor arrays.
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Automotive Electronics: Advanced Driver Assistance Systems (ADAS), radar modules, and compact engine control units.
Why Choose PCBSYNC
PCBSYNC is a professional PCB fabrication, PCBA, and EMS manufacturer delivering precision-built electronics for aerospace, medical, automotive, industrial, and smart energy applications. We handle everything from rapid prototyping to mass production — including rigid, Flexible PCB, and rigid-flex PCBs, full turnkey assembly, component sourcing, AOI and X-ray inspection, and OEM/ODM support. Reliable boards. Consistent quality. From prototype to production — PCBSYNC.
Ready to start your next engineering project? Contact our technical sales team today to submit your Gerber files and request an accurate, line-item quote.