For RF and microwave design teams, Rogers RO4350B has become one of the most widely used high-frequency substrates on the market.
Boards built with this material are known as Rogers RO4350B PCB, and they solve a real industry pain point: reliable high-frequency performance without the high cost of PTFE-based materials.
RO4350B is a glass-reinforced hydrocarbon/ceramic laminate, developed for high-volume, performance-critical commercial RF applications.
It delivers strong RF characteristics while remaining compatible with standard FR4 manufacturing processes, making it much easier to fabricate than traditional microwave substrates.
As operating frequencies rise above 500 MHz, material choices become far more limited.
Rogers RO4350B PCB provides the low loss and stable dielectric properties RF engineers need for consistent impedance-controlled designs, including filters, couplers and signal distribution networks.
Its dielectric constant remains stable across a wide frequency range, with one of the lowest temperature coefficients in commercial PCB materials.
This combination makes it particularly well suited for broadband RF and microwave systems.
Drilling Performance and Tool Life
In production, hole quality is often a better indicator of tool condition than simple visual wear.
RO4350B drills cleanly with standard epoxy/glass-compatible drill bits, and hole quality remains consistent even with extended tool use.
Hole wall roughness typically stays between 8 and 25 microns, even after thousands of hits.
This consistency comes from the ceramic filler particle size, which supports good plating adhesion without excessive roughness.
In real production runs, tools can easily achieve more than 2,000 hits while maintaining acceptable hole quality.
Processing and Cost Advantages
Rogers RO4350B laminates offer tight Dk control and low loss while using nearly the same fabrication flow as standard FR4.
They cost significantly less than conventional microwave laminates and do not require special through-hole treatments or handling associated with PTFE materials.
The material carries a UL 94 V-0 flammability rating, making it suitable for active devices and high-power RF circuits where safety and reliability are required.
Key Specifications
- Dielectric Constant (Dk): 3.48 ± 0.05
- Dissipation Factor (Df): 0.0037 at 10 GHz
- Z‑axis Thermal Expansion: 32 ppm/°C
Real-World Benefits
- Compatible with standard FR4 processes for lower fabrication cost
- Lower cost than traditional high-frequency laminates
- Excellent dimensional stability across temperature and frequency
OPCBA operates production lines optimized for Rogers RO4350B PCB manufacturing.
If you’re working on an RF, microwave or broadband design, we can support your prototype and volume production needs.
Contact us today to discuss your project.
