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PTFE PCB vs FR4 PCB
08 July 2025
Views: 4
PTFE (polytetrafluoroethylene) and FR4 (flame retardant 4) are two widely used options. Each has unique properties that make it suitable for different applications.


Characteristics PTFE PCB FR4 PCB
Material Composition Polytetrafluoroethylene with glass fiber and ceramic fillers Fiberglass-reinforced epoxy laminate
Dielectric Constant 2.2-2.4 4.2-4.8
Dissipation Factor 0.0002-0.0004 0.014-0.019
Operating Temperature -200°C to +260°C -50°C to +130°C
Cost High Low
Frequency Performance Excellent for high frequencies (>1GHz) Good up to 500MHz
Primary Applications - High-frequency RF systems
- Microwave circuits
- Satellite communications
- Military/aerospace equipment
- Consumer electronics
- Industrial equipment
- Computer hardware
- General electronics
Manufacturing Complexity Complex, requires special tools and processes Standard, well-established processes
Thermal Stability Excellent Good
Signal Integrity Superior Moderate
Moisture Resistance Excellent Good
Mechanical Strength Moderate High
Chemical Resistance Excellent Good
Market Availability Limited Widely available
Processing Requirements Specialized equipment and expertise Standard PCB equipment
Dimensional Stability Excellent Good
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