Printed Circuit Board PrototypingPrototype

Printed circuit board prototype service — order PCB prototypes online with 24h turnaround, 1 to 24 layers and no MOQ. From a single prototype PCB to production-ready prototype printed circuit fabrication, Lianyuhong delivers affordable FR-4 quality.

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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 Order PCB Prototypes

Four simple steps to order PCB prototypes and get your design fabricated and shipped.

Upload Gerber Files

Upload your Gerber files, BOM and PCB specifications through our quoting portal. No minimum order quantity — a single prototype PCB is welcome.

DFM Review

Our engineers run a design-for-manufacturability (DFM) review on your prototype printed circuit — checking stack-up, drill, impedance and finish — before fabrication begins.

Fabricate

Your prototype PCB is fabricated on our FR-4 lines — 1 to 24 layers, 24h turnaround for quick-turn prototypes, with AOI and electrical test on every panel.

Ship

Finished prototype boards are inspected, packed with full quality documentation and shipped worldwide so you can order PCB prototypes and validate your design fast.

Prototype to Production Path

A printed circuit board prototype on this page is the starting point, not the end. Once your prototype PCB passes functional test, the natural next step is scaling up: move to small batch PCB assembly for pilot runs and engineering validation, then on to volume production. The same engineering team follows your project from prototype printed circuit fabrication through to mass production, so design intent and stack-up are preserved at every stage.

Ready to Start Your PCB Prototype?

Send us your Gerber files and let our team provide a competitive quote within 24 hours — no MOQ, 1 to 24 layers.

Order PCB Prototypes sales@lyhcircuits.com