FR-4 PCBs, Made Affordable
Industry-standard FR-4 printed circuit boards from single-layer to 24-layer stacks. Lianyuhong combines advanced fabrication technology with competitive pricing and fast turnaround to bring your designs to life.
What is an FR4 PCB?
FR-4 is a material grade used in PCB manufacturing, made of fibreglass and epoxy resin. As a flame-retardant grade 4 glass-reinforced epoxy laminate, it is the most widely used substrate in the electronics industry thanks to its excellent mechanical, thermal, and electrical properties. FR-4 boards are suitable for everything from low-cost consumer gadgets to high-reliability aerospace and medical devices.
Cost-Effective & Widely Available
FR-4 is the most commonly used PCB substrate material, offering an excellent balance of performance and cost. Its widespread availability ensures stable pricing and short lead times for production runs of any size.
Good Mechanical Strength
The fibreglass reinforcement gives FR-4 outstanding tensile and flexural strength, making it resistant to warping, vibration, and physical stress during assembly and operation.
Reliable Electrical Insulation
With a dielectric constant typically between 4.2 and 4.8 and excellent arc resistance, FR-4 provides consistent electrical performance across a wide range of frequencies and operating conditions.
Applications
FR-4 PCBs serve a broad range of industries and product categories.
Consumer Electronics
From smartphones and tablets to wearable devices, FR-4 PCBs are the backbone of modern consumer electronics, offering reliable performance at scale.
Industrial Control Systems
FR-4 boards deliver the durability and thermal stability required for PLCs, motor drives, sensors, and automation controllers in demanding industrial environments.
Automotive Electronics
Meeting automotive-grade reliability standards, FR-4 PCBs are used in ECU systems, infotainment, ADAS, and powertrain control modules.
Manufacturing Capabilities
Our FR-4 production lines cover a comprehensive set of specifications.
| Parameter | Detail |
|---|---|
| Layer Count | 1 – 24 Layers |
| Board Thickness | 0.3 – 3.4 mm |
| Min Dielectric Thickness | 0.05 mm |
| Max Panel Size | 724 × 622 mm (28.5" × 24.5") |
| Base Copper Weight | 0.5 / 1 / 3 / 6 oz |
| Finished Copper (Outer) | 1 – 5 oz |
| Hole-wall Copper | 20 – 70 μm |
| Min Line Width/Space (Inner) | 0.05 / 0.05 mm |
| Min Line Width/Space (Outer) | 0.05 / 0.05 mm |
| Line Width Tolerance | ±20% (Typical), ±10% (Advanced) |
| Layer to Layer Registration | 5 mil |
| Controlled Impedance | ±8% |
| Min Mechanical Drill | ≥0.15 mm |
| Min Laser Drill | ≥0.075 mm |
| Max Aspect Ratio (PTH) | 12:1 |
| Backdrill Depth Tolerance | ±3 mil |
| Signal Integrity | SET2DIL / Delta-L / VNA |
| Surface Finish | HASL-LF, HASL, ENIG, Immersion Tin, OSP, Immersion Silver, Gold Finger, Selective OSP |
Laminate Materials
Suppliers: Rogers, Panasonic, Nelco, TUC, Isola, ITEQ, SYTECH, Nanya, Taconic, EMC, DOOSAN, Wazam, CCTC, NOUYA, KB
Types: CEM-1, CEM-3, High-CTI, Unleaded (Mid/High-Tg), Halogen Free, High Frequency (hydrocarbon, PTFE), High Speed (mid-loss, low-loss, very-low-loss, ultra-low-loss), PI, MPI, LCP
Special Processes
- • Embedded PCB (parallel capacitor, daughter board)
- • Stepped PCB (PTH slot, NPTH slot, stepped G/F)
- • Heat Dissipation PCB (IMS, embedded Cu/Coin/Ceramic)
- • High Density PCB (0.35mm BGA HDI, backdrill)
- • POFV/VIPPO, Hybrid, Edge Plating, Semi-flex
- • HDI Structures: Through-hole, Anylayer, 5+N+5, Air-gap
Why Choose Lianyuhong?
Partnering with Lianyuhong means reliable quality, competitive pricing, and responsive support for your FR-4 projects.
Cost-Effective Production
Optimised processes and high-volume material sourcing keep your per-unit cost low without sacrificing quality.
Extensive Capability
From simple 2-layer boards to complex 24-layer HDI designs, our facility handles the full spectrum of FR-4 fabrication.
High Customization
Special impedance control, blind/buried vias, custom stackups, and non-standard board sizes are all within our standard workflow.
Fast & Global Delivery
With a 50,000+ ft² factory and logistics partners worldwide, we deliver reliably to over 30 countries.
How to Get Started
Three simple steps to get your FR-4 PCBs manufactured and delivered.
Upload Files
Upload your Gerber files, PCB specifications, and any special requirements through our quoting portal or email them directly.
Get Quote
Our engineering team reviews your design and provides a detailed quote with lead time and pricing within 24 hours.
Receive Boards
Once confirmed, your FR-4 PCBs are manufactured, inspected, and shipped to your door with full quality documentation.
Ready to Start Your FR-4 PCB Project?
Send us your design files and let our team provide a competitive quote within 24 hours.