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Multi-layer Circuit Board


Multi-layer Circuit Board – High-Density PCB Solutions for Advanced Electronics


The Multilayer Circuit Board (Multilayer PCB) is an advanced printed circuit board design featuring multiple copper conductive layers laminated together with insulation.
It enables high circuit density, signal integrity, and compact layouts—perfect for modern telecommunication, automotive, medical, aerospace, and industrial control systems.

At XRX PCB, we provide custom multilayer PCB manufacturing services with full engineering support, from 4-layer prototypes to 20-layer HDI boards.
Our in-house production ensures tight tolerance, high reliability, and competitive lead times for your complex electronic designs.


Core Highlights


Feature Description Benefit
Layer Options 4 to 20 layers Supports complex circuit routing & signal control
High-Density Interconnect (HDI) Microvia & blind/buried via technology Enables compact, lightweight designs
Controlled Impedance Maintains signal stability Ideal for high-speed data transmission
Thermal Management Multi-prepreg lamination & balanced copper Ensures heat dissipation in power circuits
Precision Alignment Automated optical layer registration Guarantees inner layer consistency
Full Quality Inspection AOI, flying probe test, impedance check 100% reliability verification


Applications & Industry Use Cases


Multilayer PCBs play a critical role across a wide range of industries:

Industry Application Benefit
Telecommunication Routers, 5G base stations, signal processors High-speed, low-loss transmission
Automotive Electronics ECU, ADAS, EV battery management Lightweight & heat-tolerant design
Medical Devices Imaging systems, monitoring equipment Stable signal integrity & miniaturization
Aerospace & Defense Navigation, radar, satellite systems Extreme reliability & vibration resistance
Industrial Automation PLCs, motor controllers, sensors Long operational life under harsh conditions
Consumer Electronics Smart devices, IoT products Compact structure, low EMI interference


Our multi-layer PCBs are widely used across various industries:

  • Telecommunications: Routers, switches, signal processors

  • Industrial Control Systems: PLCs, automation equipment

  • Medical Devices: Imaging equipment, monitors, diagnostic tools

  • Aerospace: Avionics and control systems

  • High-End Consumer Electronics: Smartphones, tablets, wearable devices

These boards provide superior signal integrity, improved EMI shielding, and efficient space utilization, enabling designers to implement high-density circuits reliably.


Material & Technical Specifications


Parameter Specification / Range Description
Base Materials FR-4, High-Tg FR-4, CEM-3, Rogers, Aluminum Core Suited for different thermal & frequency needs
Layer Count 4–20 Layers Multilayer lamination for high-density boards
Board Thickness 0.6 mm – 3.2 mm Customizable based on layer stack-up
Copper Thickness 1 oz – 3 oz Higher copper weight supports power circuits
Min. Line Width / Spacing 3 mil / 3 mil (0.075 mm) Enables fine-pitch high-speed designs
Vias & Interconnections Through-hole, Blind/Buried, Microvia Advanced interlayer connectivity
Surface Finishes ENIG, Immersion Gold, OSP, Lead-Free HASL Enhances solderability & corrosion resistance
Solder Mask Colors Green, Black, White, Blue, Red, Yellow Custom for branding or function
Thermal Conductivity 0.8 – 2.0 W/m·K Ensures efficient heat transfer
Flame Retardant UL 94V-0 Certified Meets international fire safety standards
Testing AOI, Flying Probe, Impedance, Cross-section Analysis Full electrical & mechanical inspection
Certifications ISO 9001, UL, RoHS, IPC-A-600 Global quality and compliance standards
Typical Applications Telecommunication, Automotive, Aerospace, Medical, Industrial Control, Power Systems Suitable for compact, high-performance electronics


Why Choose a Multilayer PCB?


Multilayer PCBs are designed for performance-critical electronic assemblies that demand both density and reliability.
They combine multiple signal layers with internal planes for power and grounding, reducing electromagnetic interference (EMI) and improving design stability.

✅ Advantages Over Single & Double-Sided PCBs

  • Higher circuit density and smaller footprint

  • Improved signal integrity and EMI shielding

  • Excellent thermal balance and mechanical strength

  • Supports high-speed, high-frequency applications

  • Enhanced reliability with multiple dielectric layers

A perfect choice for advanced electronics, IoT devices, and compact embedded systems.


Why Choose Xinrongxing PCB?


  • Advanced Manufacturing Capabilities: Precision etching, controlled lamination, and via formation

  • Material Flexibility: FR-4, high-Tg FR-4, Rogers, and high-frequency materials

  • OEM / ODM Support: Custom designs tailored to specific requirements

  • Quality Assurance: 100% testing for functionality and reliability, ISO and RoHS compliant

  • Fast Turnaround: From rapid prototyping to bulk production


Frequently Asked Questions (FAQ)


Q1: What is a multi-layer PCB?

A: A multi-layer PCB consists of three or more conductive layers separated by insulating materials, allowing for high-density and high-performance circuit designs.


Q2: Why use multi-layer PCBs instead of single or double-sided boards?

A: As electronics become smaller and more complex, single and double-sided PCBs cannot meet space and performance requirements. Multi-layer PCBs allow for higher assembly density, reduced footprint, and improved EMI control.


Q3: How many layers can Xinrongxing produce?

A: We provide custom multi-layer PCBs up to 20 layers with precision impedance control.


Q4: What materials are available for multi-layer PCBs?

A: FR-4, High-Tg FR-4, Rogers, and other high-frequency materials are available depending on your application.


Q5: Are multi-layer PCBs suitable for prototyping?

A: Yes, we offer rapid prototyping and mass production, ensuring flexibility for development and production phases.


Request a Quote


Looking for high-density, reliable multi-layer PCBs for your advanced electronics project?
Contact XRXPCB today to get a custom solution, fast lead times, and competitive pricing.

Get a Quote Now!

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