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| Customization: | Available |
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| Type: | Rigid Laminate |
| Dielectric: | PTFE Glass Fabric Copper-Clad Laminate |
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(Custom PCBs are tailored products; the images and specifications provided are for reference only.)
Overview of This Type of Laminate
F4BM is a PTFE glass fabric copper-clad laminate developed by Taizhou Wangling Insulation Material Factory. It is composed of glass fiber cloth, PTFE resin, and PTFE film, offering improved electrical performance over standard F4B, including a wider range of dielectric constants, lower loss, higher insulation resistance, and greater stability. F4BM255 is one variant within this series with a dielectric constant of 2.55. F4BM is paired with standard ED copper foil and is suitable for applications without PIM requirements.
Technical Features:
Selectable Dielectric Constant (Dk) from 2.17 to 3.0; customizable Dk.
Low loss (low dissipation factor).
Good dimensional stability and enhanced size control.
Radiation resistance, low outgassing.
Commercialized, high-volume, cost-effective production.
Dimensional stability improves with higher Dk (higher glass content).
UL 94 V-0 flammability rating.
Typical Properties:
| Properties | Test Conditions | Unit | F4BM255 |
|---|---|---|---|
| Electrical Properties | |||
| Dielectric Constant (Typical) | 10 GHz | - | 2.55 |
| Dielectric Constant Tolerance | / | - | ±0.05 |
| Dissipation Factor (Typical) | 10 GHz | - | 0.0013 |
| 20 GHz | - | 0.0018 | |
| Temperature Coefficient of Dk | -55°C to 150°C | ppm/°C | -110 |
| Peel Strength | 1 oz. F4BM | N/mm | >1.8 |
| Volume Resistivity | Normal Condition | MΩ·cm | ≥6×106 |
| Surface Resistance | Normal Condition | MΩ | ≥1×106 |
| Dielectric Strength (Z-direction) | 5 kW, 500 V/s | kV/mm | >25 |
| Breakdown Voltage (XY-direction) | 5 kW, 500 V/s | kV | >34 |
| Thermal & Mechanical Properties | |||
| CTE | XY-direction, -55°C to 288°C | ppm/°C | 16~21 |
| Z-direction, -55°C to 288°C | ppm/°C | 173 | |
| Thermal Stress | 260°C, 10s, 3 cycles | - | No Delamination |
| Water Absorption | 20±2°C, 24 hours | % | ≤0.08 |
| Density | Room Temperature | g/cm³ | 2.25 |
| Long-term Operating Temperature | High/Low Temp Chamber | °C | -55 to +260 |
| Thermal Conductivity | Z-direction | W/(m·K) | 0.33 |
| PIM Value | Applicable only to F4BME series | dBc | ≤-159 |
| Flammability Rating | / | UL-94 | V-0 |
| Material Composition | / | / | PTFE, Glass Fiber Cloth; F4BM uses ED copper foil. |
Application Areas:
Microwave, RF, Radar
Phase Shifters, Passive Components
Power Dividers, Couplers, Combiners
Feed Networks, Phased Array Antennas
Satellite Communication, Base Station Antennas
Available Configurations:
Tags: F4BM255, PTFE PCB, low loss, Dk 2.55, high thermal stability, V-0, PIM performance, wide temperature range, RF microwave, cost-effective.
Quality standard: IPC-Class-2
Availability: Worldwide
Why Choose Us?
1. Engineering design prevents problems from occurring in pre-production;
2. ISO9001, ISO14001, ISO13485, UL certified manufacturing factory;
3. AOI inspection;
4. Delivery on time higher than 98% on-time-delivery rate;
5. 16000m2 workshop;
6. 30000m2 output capability per month;
7. 8000 types of PCB's per month;
8. Quick CADCAM checking and free PCB quotation;
9. More than 18+ years of PCB experience;
10. Customer complaint rate: <1%
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