4-Layer Rigid-Flex PCB (1R+2F+1R) Manufacturing with Inductance & Low Resistance Control

Rigid-flex PCB technology combines rigid FR4 layers with flexible polyimide layers to create compact, high-reliability interconnection solutions. The product shown above is a customized 4-layer rigid-flex PCB (1R+2F+1R) developed for a customer requiring local coil plating and low-resistance inductance control performance.

This advanced rigid-flex PCB manufacturing solution integrates mechanical flexibility with electrical stability, making it ideal for compact industrial electronics, precision control modules, and high-performance power systems.

At Ring PCB, we specialize in rigid-flex PCB manufacturing and PCB assembly services, providing one-stop PCB and PCBA solutions for customers worldwide.

What Is a Rigid & Flex PCB?

A Rigid & Flex PCB is a hybrid printed circuit board that combines rigid PCB sections with flexible circuit (FPC) areas into a single integrated structure. This design allows electronic products to achieve both mechanical stability and flexible interconnections, making it ideal for compact, high-density, and space-constrained applications.

Rigid & Flex PCB technology is widely used in medical devices, industrial control, automotive electronics, aerospace, and advanced consumer electronics. By reducing connectors and cables, rigid & flex printed circuit boards improve signal reliability, reduce assembly complexity, and enhance overall product durability.

Ring PCB provides customized Rigid & Flex PCB manufacturing and assembly as part of our One-Stop Service for PCB and PCBA service solution, supporting customers from prototype to mass production.

Product Features and Advantages

A well-designed Rigid & Flex PCB offers significant advantages over traditional rigid or flexible boards alone.

Key Features

• Integrated rigid PCB and flexible circuit structure

• High-density interconnection and compact layout

• Flexible bending areas for 3D assembly

• Support for ENIG surface finish and hard gold fingers

• FPC with PI stiffener for enhanced mechanical strength

Main Advantages

• Reduced connectors and assembly steps

• Improved signal integrity and reliability

• Enhanced mechanical durability in dynamic environments

• Optimized space utilization and product miniaturization

• Suitable for complex, high-precision applications

With advanced manufacturing processes, Ring PCB ensures every Rigid & Flex PCB meets strict performance and quality requirements across various industries.

Technical Challenges in Rigid & Flex PCB Manufacturing

Manufacturing a Rigid & Flex PCB involves higher technical complexity compared to standard printed circuit boards:

• Layer Alignment: Precise registration between rigid and flex layers is critical for reliability.

• Material Combination: Managing different materials (FR-4 and polyimide) requires strict process control.

• Impedance and Signal Integrity: Fine trace width and spacing demand high-precision etching.

• Mechanical Reliability: Bending areas must withstand repeated flexing without cracking or delamination.

As an experienced EMS provider, Ring PCB overcomes these challenges through mature process control, advanced equipment, and skilled engineering teams.

Typical Technical Parameters (For Reference Only)

The following specifications are based on the product shown in the image and are for reference only.
Actual parameters can be customized according to customer design requirements.
Please contact our professional sales team for detailed consultation.

Applications of Rigid & Flex Printed Circuit Boards

Applications

This type of 6-layer rigid-flex PCB manufacturing solution is widely used in:

• Automotive electronic control systems

• Industrial automation modules

• Medical diagnostic devices

• Aerospace equipment

• High-end communication systems

FAQ

Q1: What are the advantages of a 6-layer rigid-flex PCB over a standard multilayer PCB?

A 6-layer rigid-flex PCB integrates flexible interconnections directly into the board, reducing connectors and improving reliability.

Q2: Can you provide full turnkey assembly for rigid-flex PCBs?

Yes. We offer complete turnkey PCB assembly services including sourcing, SMT, testing, and quality control.

Q3: Do you support automotive-grade production?

Yes. Our manufacturing complies with IATF16949 standards and supports automotive electronics applications.

Q4: Can rigid-flex PCBs handle dynamic bending?

Yes. Flex sections can be designed for static or dynamic bending based on customer requirements.

One-Stop Service for PCB and PCBA Solutions

Ring PCB’s Key Advantages

1. Advanced Engineering for Precision PCB Manufacturing

   • High-Density Stack-Up: 2-48 layer boards, ideal for 5G, industrial control, medical devices, and automotive electronics.

   • Smart Manufacturing: Self-owned facilities with LDI laser exposure, vacuum lamination, and flying probe testers, ensuring compliance with IPC-6012 Class 3 standards.

2. Integrated PCBA Services | One-Stop Turnkey Solutions

   • Full Assembly Support: PCB fabrication, component sourcing, SMT assembly, and functional testing, all under one roof.

   • DFM/DFA Optimization: Our expert engineering team optimizes designs to reduce risks and BOM costs, enhancing efficiency.

   • Rigorous Quality Control: X-ray inspection, AOI testing, and 100% functional validation ensure zero-defect delivery.

3. Self-Owned Factory with Full Supply Chain Control

   • Vertical Integration: We manage raw material procurement, production, and testing in-house, ensuring maximum control over the production process.

   • Triple Quality Assurance: AOI, impedance testing, and thermal cycling with a defect rate of <0.2% (industry average: <1%).

   • Global Certifications: ISO9001, IATF16949, and RoHS compliance to meet international standards.

Why Choose Ring PCB?

• 17 Years of Excellence in PCB and PCBA manufacturing, offering high-quality, reliable products for critical applications.

• Self-Owned Factories ensure full control over the production process, allowing us to meet strict deadlines and guarantee consistent quality.

• End-to-End Technical Support: From design and prototyping to mass production and final assembly, we provide comprehensive support at every stage.

• Fast Turnaround: Prototype production within 7 days and mass production within 15 days to keep your projects on schedule.

• Global Reach: Serving customers in over 50 countries with ongoing industrial partnerships.

Contact Us

📧 Email: rfq@ringpcb.com