Engineering-Grade Rigid-Flex for Demanding Applications
Designed for engineers who refuse to compromise, the PCBSync 4-Layer Rigid-Flex PCB combines the mechanical stability of a rigid board with the dynamic flexibility of a flex circuit — all in a single, integrated assembly. With an aluminum stiffener for targeted reinforcement and an ENIG surface finish for exceptional pad quality, this board is built to perform in the most demanding electronic environments.
Whether you’re designing next-generation wearables, implantable medical devices, aerospace avionics, or high-density industrial controls, this rigid-flex solution eliminates the need for connectors and harnesses — reducing weight, improving reliability, and simplifying assembly.
Technical Specifications
| Attribute |
Specification |
| Layer Count |
4 (2 rigid + 2 flex, or fully integrated stackup) |
| Base Material |
Polyimide (flex) + FR4 (rigid sections) |
| Surface Finish |
ENIG — Electroless Nickel Immersion Gold |
| Stiffener Material |
Aluminum (customizable thickness) |
| Copper Weight |
1oz outer / 0.5oz inner (custom available) |
| Min. Trace / Space |
3mil / 3mil |
| Board Thickness (Rigid) |
0.8mm – 3.2mm |
| Board Thickness (Flex) |
0.1mm – 0.3mm |
| Operating Temperature |
−55°C to +125°C |
| IPC Standard |
IPC-6013 Class 2 / Class 3 |
| Drill Registration |
±0.05mm |
| Lead Time |
7–14 business days (expedite available) |
Why Choose PCBSync?
At PCBSync, every rigid-flex board is produced in our ISO-certified facility with full traceability, AOI inspection, and electrical testing before shipment. Our engineering team works with you from schematic to stackup — ensuring your design is manufacturable, reliable, and cost-optimized.
Looking for a different stackup, material set, or volume pricing? Browse our full Rigid Flex PCB service page for custom quoting, design guidelines, and technical support from our PCB specialists.
