4-Layer PCB with RT/Duroid 5880 and RO4450F, 3.0mm Thickness, and
OSP Finish
(All PCBs are custom-manufactured. Reference images and parameters
may vary based on your design requirements.)
1. Overview of the 4-Layer PCB
This 4-layer PCB combines RT/duroid 5880 and RO4450F materials to
deliver exceptional performance in high-frequency circuits. The
RT/duroid 5880 core provides uniform dielectric constant, low
dissipation factor, and excellent moisture resistance, while the
RO4450F bonding ply ensures mechanical stability and durability.
With a 2.2 dielectric constant (Dk) and low dissipation factor (Df)
of 0.0009 at 10 GHz, this PCB ensures outstanding signal integrity.
The OSP finish is ideal for protecting copper surfaces and ensuring
solderability during assembly. Designed with blind vias and strict
IPC-Class-2 compliance, this PCB is built for reliability and
performance in critical applications.
2. PCB Construction Details
| Parameter | Specification |
| Base Material | RT/duroid 5880 / RO4450F |
| Layer Count | 4 layers |
| Board Dimensions | 50mm x 60mm ± 0.15mm |
| Minimum Trace/Space | 5/7 mils |
| Minimum Hole Size | 0.45mm |
| Via Type | Blind vias (Top to Inner Layer 3) |
| Finished Board Thickness | 3.0mm |
| Finished Copper Weight | 1oz (1.4 mils) outer and inner layers |
| Via Plating Thickness | 20 μm |
| Surface Finish | Organic Solderability Preservative (OSP) |
| Top Solder Mask | None |
| Bottom Solder Mask | None |
| Top Silkscreen | None |
| Bottom Silkscreen | None |
| Electrical Testing | 100% tested to IPC-Class-2 standards |
3. PCB Stackup
The 4-layer rigid PCB stackup is carefully designed to balance
low-loss performance and mechanical durability. Here’s the detailed
stackup:
| Layer | Material | Thickness |
| Copper Layer 1 | Copper (1oz) | 35 μm |
| Core Material | RT/duroid 5880 | 1.575mm (62mil) |
| Copper Layer 2 | Copper (1oz) | 35 μm |
| Bonding Layer | RO4450F Bonding Ply | 0.102mm (4mil) |
| Core Material | RT/duroid 5880 | 0.787mm (31mil) |
| Bonding Layer | RO4450F Bonding Ply | 0.102mm (4mil) |
| Copper Layer 3 | Copper (1oz) | 35 μm |
| Core Material | RT/duroid 5880 | 0.254mm (10mil) |
| Copper Layer 4 | Copper (1oz) | 35 μm |
4. Features of RT/Duroid 5880
- Dielectric Constant (Dk): 2.2 ± 0.02 at 10 GHz/23°C, ensuring stable signal propagation.
- Dissipation Factor (Df): 0.0009 at 10 GHz, minimizing signal loss.
- Temperature Coefficient of Dielectric Constant (TCDk): -125 ppm/°C.
- CTE (Coefficient of Thermal Expansion): X-axis: 31 ppm/°C. Y-axis: 48 ppm/°C. Z-axis: 237 ppm/°C. Ensures dimensional stability and reliable plated-through hole performance.
- Moisture Absorption: 0.02%, ensuring consistent performance in humid environments.
- Isotropic Properties: Ensures uniform electrical and mechanical
performance.
5. Benefits of RT/Duroid 5880 Material
Uniform Electrical Properties: Ensures stable performance over a wide range of frequencies.
Low Electrical Loss: Ideal for high-frequency applications, including Ku-band and above.
Dimensional Stability: The glass microfiber reinforcement improves stability and reduces
warping.
Moisture Resistance: Maintains performance in humid or marine environments.
Machinability: Easily cut, drilled, or machined, reducing manufacturing
complexity.
6. Applications of the 4-Layer PCB
Commercial Airline Broadband Antennas
Microstrip and Stripline Circuits
Millimeter-Wave Applications
Radar and Guidance Systems
Point-to-Point Digital Radio Antennas
Why Choose Bicheng Technologies?
At Bicheng Technologies Limited, we specialize in manufacturing
high-quality PCBs for RF and microwave applications. Our 4-layer
PCB with RT/duroid 5880 and RO4450F materials combines advanced
materials with precise fabrication to deliver reliable and
high-performance solutions for your projects.
Why Work With Us?
Global Reach: We deliver worldwide and provide excellent customer support.
High Standards: All PCBs are tested to IPC-Class-2 standards, ensuring quality and
reliability.
Custom Solutions: We work closely with you to meet your specific requirements.
If you’re looking for a trusted partner for your next
high-frequency project, feel free to contact me at sales30@bichengpcb.com. Let’s work together to bring your innovative designs to life.
