When it comes to high-density, space-constrained electronic designs, the PCBSync 4-Layer Rigid-Flex PCB with Immersion Tin Finish delivers the precision and durability modern engineers demand. Combining rigid and flexible circuitry into a single board, this solution eliminates the need for connectors and reduces assembly complexity — making it a top choice for aerospace, medical, wearable, and consumer electronics applications.
What Is a 4-Layer Rigid-Flex PCB?
A 4-layer rigid-flex PCB integrates four conductive copper layers across both rigid and flexible sections. This multi-layer construction enables high signal integrity, improved electromagnetic shielding, and efficient power distribution. The flexible zones allow the board to bend and fold into compact enclosures without sacrificing electrical performance, reducing the overall footprint of your device.
The Advantage of Immersion Tin Finish
PCBSync applies a RoHS-compliant Immersion Tin (ImSn) surface finish, providing a flat, solderable surface ideal for fine-pitch components and SMT assembly. Immersion tin offers excellent shelf life, superior solderability, and uniform coating thickness — critical for today’s miniaturized designs. Unlike HASL finishes, immersion tin ensures consistent pad planarity, reducing solder bridging and improving first-pass yield.
Why Choose PCBSync?
PCBSync manufactures rigid-flex PCBs with tight tolerances, strict impedance control, and advanced DFM (Design for Manufacturability) reviews. Their 4-layer rigid-flex boards support blind and buried vias, laser-drilled microvias, and customized stack-up configurations to meet demanding technical specifications.
Key Specifications at a Glance
- Layers: 4 (rigid-flex construction)
- Surface Finish: Immersion Tin (ImSn)
- Material: Polyimide flex + FR4 rigid
- Applications: Medical devices, IoT, aerospace, wearables
Order your PCBSync 4-Layer Rigid-Flex PCB with Immersion Tin Finish today and experience industry-leading quality with fast turnaround times.
