This high-performance PCB is constructed with Rogers RT/duroid
5880—a premium PTFE composite reinforced with glass microfibers—and
engineered for demanding high-frequency applications.
PCB Specification
| Parameter | Details |
| Base Material | Rogers RT/duroid 5880 (PTFE composite reinforced with glass
microfibers) |
| Layer Count | 2-layer rigid PCB |
| Board Dimensions | 90mm x 90mm (1 piece)±0.15mm |
| Minimum Trace/Space | 5/5 mils |
| Minimum Hole Size | 0.3mm |
| Via Type | No blind vias (thru-hole vias only) |
| Finished Board Thickness | 1.6mm |
| Copper Weight (Finished) | 1oz (equivalent to 1.4 mils / 35 μm per layer) |
| Via Plating Thickness | 20 μm |
| Surface Finish | Immersion Gold (for enhanced conductivity and corrosion resistance) |
| Silkscreen | Top: No; Bottom: No |
| Solder Mask | Top: No; Bottom: No |
| Quality Assurance | 100% Electrical test prior to shipment |
PCB Stack-up Details
The board’s stack-up is optimized for consistent electrical
performance and mechanical stability:
| Layer Type | Material/Description | Thickness |
| Copper Layer 1 | Conductive copper (finished) | 35 μm (1oz) |
| Dielectric Layer | Rogers RT/duroid 5880 | 5.575 mm (62 mils) |
| Copper Layer 2 | Conductive copper (finished) | 35 μm (1oz) |
Material Overview: Rogers RT/duroid 5880
Rogers RT/duroid 5880 is a premium high-frequency laminate designed
for stripline and microstrip circuits. Its randomly oriented glass
microfibers deliver exceptional dielectric constant uniformity,
while its PTFE base ensures low electrical loss—making it ideal for
applications requiring reliability across wide frequency ranges.
The material is resistant to all solvents and reagents (hot or
cold) used in PCB etching, plating, and processing, and it supports
lead-free manufacturing processes.
Key Material Features
| Specification | Value |
| Dielectric Constant (εr) | 2.2 ± 0.02 at 10 GHz / 23°C (uniform panel-to-panel) |
| Dissipation Factor (tanδ) | 0.0009 at 10 GHz |
| Temperature Coefficient of Dielectric Constant (TCDk) | -125 ppm/°C |
| Moisture Absorption | 0.02% |
| Coefficient of Thermal Expansion (CTE) - X-axis | 31 ppm/°C |
| Coefficient of Thermal Expansion (CTE) - Y-axis | 48 ppm/°C |
| Coefficient of Thermal Expansion (CTE) - Z-axis | 237 ppm/°C |
| Thermal Stability (Td, 5% weight loss via TGA) | 500 °C |
| Flammability Rating | UL 94-V0 |
| Lead-Free Compatibility | Yes (RoHS-compliant process compatible) |
| Isotropy | Yes (uniform properties across all axes) |
Core Benefits
Consistent Electrical Performance: Uniform dielectric constant and
low dissipation factor over wide frequency ranges (supports Ku-band
and above, including millimeter waves)
Easy Fabrication: Simple to cut, shear, and machine to custom
shapes
Chemical Resistance: Withstands solvents and reagents used in
etching, hole plating, and PCB processing
Moisture Resilience: Near-zero moisture absorption (0.02%) makes it
ideal for high-humidity or harsh environments
Proven Reliability: Well-established material with a track record
in critical applications
Lowest Loss for Reinforced PTFE: Superior electrical efficiency
compared to other reinforced PTFE laminates
Typical Applications
This PCB is engineered for high-performance systems requiring
precision and reliability, including:
-Commercial airline broadband antennas
-Microstrip and stripline circuits
-Millimeter wave communication systems
-Radar systems
-Guidance systems
-Point-to-point digital radio antennas
