UnityPCB delivers precise, high-quality, and efficient FR4 PCB fabrication services tailored to your needs.
FR4 PCB is one of the most widely used and versatile types of PCB in the electronics industry. These circuit boards are made of a composite material consisting of woven fiberglass reinforced with an epoxy resin.
| Specification | Value |
|---|---|
| Layers | Up to 18 layers |
| Laminate Thickness | 0.031 in (0.8 mm) - 0.062 in (1.6 mm) |
| Copper Thickness | 1 oz/ft² to 3 oz/ft² |
| Dielectric Constant (Er) | 4.0 - 4.7 (at 1 MHz) |
| Dissipation Factor (Tan δ) | 0.02 (at 1 MHz) |
| Maximum Operating Temperature | 130°C (266°F) |
| Glass Transition Temperature (Tg) | 130°C to 180°C |
| Coefficient of Thermal Expansion (CTE) | 12 - 16 ppm/°C (along X and Y axes) 60 - 70 ppm/°C (along Z-axis) |
| Moisture Absorption | 0.1% (at 23°C and 50% RH) |
| Flammability Rating | UL94 V-0 |
| Surface Finishes | HASL, ENIG, OSP, and others |
| Certifications | UL , IPC-6012, RoHS, ISO 9001, ISO14001 |
As a leading FR4 PCB manufacturer, we offer top-notch FR4 PCB fabrication services designed to meet the diverse needs of our clients.
Custom Design
and Prototyping
UnityPCB's engineers craft custom PCBs tailored to your requirements, with our prototyping services swiftly turning your concepts into reality.
Advanced
Manufacturing
With cutting-edge technology, we produce single-layer to multi-layer FR4 PCBs with precision and consistency.
Quality
Assurance
Every PCB undergoes rigorous testing, including AOI, X-ray, and electrical testing, to ensure top-notch quality.
Technical
Support
Our dedicated support team is always available to assist you, from initial consultation to post-production support.
FR4 circuit boards are extensively utilized across a wide range of industries:
UnityPCB’s 12,400㎡ facility includes a 2,600㎡ clean room, 5 SMT lines, and 3 DIP production lines. Equipped with precision drilling machines, plating systems, and etching setups for exact circuit patterning, as well as reflow soldering machines and wave soldering systems. Our state-of-the-art X-Ray and AOI machines ensure the high-quality PCB production.
FR4 PCB is a printed circuit board built from a raw material commonly called FR4, a fiberglass epoxy composite that boasts of a remarkable strength to weight ratio and insulation capacity.
The ‘FR’ indicates its flame-retardant properties, while ‘4’ refers to its specific composition – a mix of woven fiberglass cloth and epoxy resin. It is the most common material used in PCB fabrication.
FR4 material has a high tensile strength and a dielectric constant that is commonly utilized for its electrical insulation properties, moisture resistance, and thermal stability that can be utilized in numerous applications.
Compared to PTFE, FR4 has lower operation temperature. Additionally, it is featured with higher dissipation factor, which cause higher signal loss. Therefore, FR4 is not suitable for high-frequency applications.
Of course, FR4 PCB is one of the most cost-effective options for standard electronic devices.
FR4 printed circuit boards can be classified into single-sided, double-sided, and multi-layer boards, depending on the number of copper layers and the complexity of the design.
The glass transition temperature (Tg) of FR4 typically ranges between 130°C and 180°C, depending on the specific grade
FR4 PCBs in proper condition should maintain their properties for 20 + years. It is dependent on environmental factors as well as usage conditions.
At UnityPCB, our PCBs undergo testing and inspection such as automated optical inspection (AOI), X-ray inspection, and electrical tests.
Lead times for FR4 PCB fabrication can vary depending on the complexity of the design and the quantity. At UnityPCB, standard lead times range from 2 days to a couple of weeks.
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