Get Your Fully Customizable 4-Layer Rigid-Flex PCB Blue Solder Mask for Ultimate Quality

Need custom PCBs that fit your unique design? XingQiang’s 4-layer rigid-flex PCBs are fully customizable, with our signature blue solder mask for quality and visibility. We combine FR-4 rigidity for stability with polyimide flexibility for 3D integration, delivering tailored solutions for medical, industrial, and consumer electronics—fast, reliable, and built to your specs.

Core Characteristics:

• Structural Versatility: Integrate rigid sections for component mounting and flexible segments for bending, folding or twisting. They adapt to compact or irregular device spaces without compromising connection stability.
• Reliable Connectivity: Eliminate the need for connectors or wires between rigid parts, reducing assembly errors and failure risks. The integrated structure ensures consistent signal transmission even in dynamic environments.
• Space & Weight Optimization: Replace bulky rigid PCB assemblies with streamlined designs. They save up to 50% of installation space and reduce overall device weight, ideal for portable or miniaturized products.
• Enhanced Durability: Flexible layers resist vibration, shock and repeated bending, extending product lifespan. Rigid areas provide robust support for heavy components like chips or capacitors.
• Improved Signal Integrity: Minimize signal loss and electromagnetic interference (EMI) through shortened interconnections. The design maintains signal stability in high-frequency or high-speed applications.

How can we star our project?

Design File Requirements: We utilize RS-274X Gerber files and NC Drill files for all custom orders.

Please make sure your submission includes:
• Copper Layers: All signal and plane layers for both rigid and flex regions.
• Solder Mask: Top and bottom solder mask layers.
• Silk Screen: Component designators and assembly notes.
• Mechanical Layers: Board outline, tooling holes, and keep-out zones.
• Drill Files: Excellon format for plated and non-plated holes.
• Stack-up Info: A detailed layer stack-up drawing (Gerber or PDF) showing the flex/rigid transitions and material types.
• Impedance Spec: If impedance control is required.

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PCB Quality Testing

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