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Rigid Flex PCB Manufacturing
We bond rigid FR4/PI layers and flexible PI films into one single multilayer board. The rigid areas carry high-pin-count parts; the flex arms fold in 3-D space—no connectors, no cables, one continuous interconnect.
- Multiple material choices
- Up to 12 layers total
- Max panel size: 54 inches
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Our Rigid-Flex PCB Capabilities
Zintilon closes the gap between concept and creation in rigid-flex PCB manufacturing. From first-turn prototypes to high-reliability production runs, our advanced manufacturing network and deep engineering know-how deliver speed and unwavering quality—so your rigid-flex designs fold, fit, and function exactly as you imagined.
Rigid Flex PCB Materials
Pick the stack-up that matches your temperature → frequency → thermal → cost targets.
| Rigid Side (R) | Flex Side (F) | Bond-Ply |
| FR4 Tg 130–150 °C | PI 25 µm + RA copper | Acrylic (1–2 mil) |
| High-Tg FR4 >170 °C | PI 25 µm + RA copper | Low-flow epoxy |
| Rogers RO4350B | LCP 25 µm + RA copper | No-flow, heat-press |
| PI laminate Tg≥250 °C | PI 25 µm + RA copper | PI hot-melt |
| Al-MCPCB 1–3 mm | PI 12.5 µm + RA copper | Thermally-conductive epoxy 1–5 W/m·K |
| Cu-MCPCB 0.5–3 mm | PI 12.5 µm + RA copper | Ag-sinter paste |
| Modified low-CTE PI | PI 25 µm + RA copper | Low-flow epoxy |
PCB Surface Finishes
| Rigid Zone (R) | Flex Zone (F) | Bond Method | Surface Finish (R→F) | Features / Apps |
| FR4-Tg150 | PI 25 µm+RA Cu | Acrylic | ENIG → OSP | Phone hinge, low-cost high-rel |
| FR4-Tg170 | PI 25 µm+RA Cu | Epoxy low-flow | ENEPIG → Immersion Tin | Auto ECU, lead-free 260 °C |
| Rogers RO4350B | LCP 25 µm+RA Cu | Adhesive-less heat-press | Immersion Ag → OSP | 5G mmWave, loss <0.004 |
| High-Tg PI laminate | PI 25 µm+RA Cu | PI hot-melt | ENEPIG → Immersion Au fingers | Aero engine, all-PI 300 °C |
| Al-MCPCB 1.5 mm | PI 12.5 µm+RA Cu | Thermally-conductive epoxy | Anodize + ENIG | LED bar, 1–5 W/m·K |
| Cu-MCPCB 1 mm | PI 12.5 µm+RA Cu | Ag-sinter | Electroless Ni + hard gold fingers | Laser diode, 380 W/m·K |
| Modified low-CTE PI | PI 25 µm+RA Cu | Low-flow epoxy | ENIG → OSP | Auto BMS, –55~125 °C cycles |
Why Choose Our Rigid-Flex PCB Services?
One-on-One Quotation
Upload your Gerber files and get a quote within 24 hours. Our engineers review your design to avoid misunderstandings and offer competitive pricing.
High-Quality Production
We strictly control materials, processes, surface finishes, AOI, and flying probe tests to ensure consistent quality from prototype to mass production.
Fast Delivery
With advanced equipment and a professional team, we prioritize your order based on complexity and urgency.
Instant Communication
We provide full technical support from quote to delivery. We respond quickly to any questions until you receive your PCBs and are fully satisfied.
Rigid Flex PCB Standards
We follow the tolerance standards of ISO 2768 (medium grade, fine grade) and ISO 286 (grade 8, 7, 6). You are welcome to emphasize it in the drawings or communicate with the sales for higher precision needs. We follow ISO2768m by default in the absence of special requirements.
Stiffeners & Mechanical Support
Spec
Connectors/keypads
FR4 or PI stiffener 0.2–0.5 mm, add copper ring around screw holes
Dynamic zone
avoid stiffener; if needed, PI 0.1 mm and keep away from crease
Rigid Flex PCB Guidelines
Ensure precise tolerances, select appropriate materials, maintain clear CAD designs, and follow toolpath optimization for best results. Zintilon delivers accuracy, quality, and consistency in every machined part.
Application
Min Bend Radius
Layer Limit
Copper Position
Static fold-once
Min Bend Radius 6× board thickness
Layer Limit ≤2 L
Copper Position Any
Dynamic repeated
Min Bend Radius 31× board thickness
Layer Limit ≤2 L
Copper Position Neutral axis
High-cycle
Min Bend Radius ≥50× board thickness
Layer Limit 1 L
Copper Position Neutral axis
Our Rigid Flex PCB Services for Various Industrial Applications
From foldable phone hinges on aluminum cores to copper-cored BMS harnesses in electric vehicles, from PTFE 5G mmWave boards to PI implants in the human body, from high-Tg industrial workhorses to full-temp ceramic birds in aerospace—rigid-flex PCBs carry the load where rigidity is needed, bend where space is tight, route in 3-D, cut weight in half, and never quit.
Rigid Flex PCB FAQs
Our maximum CNC machining part size is 3000 mm x 2200 mm x 1100 mm.
Our CNC machining standard tolerances range from plus or minus 0.001mm.
The cost of CNC machining is determined by the material, machining costs, labor costs, and the tooling and surface finish involved. Feel free to contact us for a quick quote.
Got any more questions?
Ultimate Guide
to Rigid Flex PCB
to Rigid Flex PCB
Rigid Flex PCB Manufacturing
Various and Robust CNC Machining Services
Process 1
Prototyping
Zintilon's rapid prototype service bridges the gap between product concept and market during the product development. Advanced CNC machines such as Hermle 5 axis cnc milling centers, multiple international certifications, and top-notch CMM inspection ensure the accuracy and details of the prototype, meeting high standards of quality requirements.
- Advanced Technology: CNC, CMM inspection, elite engineers etc.
- Quick Response: full support to ensure problem solved.
- Customized service: customize precision machining solutions
Process 2
Production
Zintilon's on-demand production solution provides customers with a modern, efficient and customer-oriented production solution through its flexibility, high quality standards by our robust supply network and self-owned CNC shop, strict quality control inspection, etc.
- Reasonable planning: precision resource allocation to ensure quick cycle time.
- Machining SOP : advanced technology and strict QC processes.
- Flexible Production: from rapid prototyping (1-20pcs) to low-volume production (20-1000pcs).
Let’s Build Something Great, Together
