F4BM220 High-Performance 2-Layer PCB for Microwave and RF Applications
1.PCB CONSTRUCTION DETAILS
| Specification | Details |
|---|---|
| Base Material | F4BM220 |
| Layer Count | 2 layers |
| Board Dimensions | 130.5mm x 103mm (1 piece, +/- 0.15mm) |
| Minimum Trace/Space | 4/6 mils |
| Minimum Hole Size | 0.3mm |
| Blind Vias | None |
| Finished Board Thickness | 1.7mm |
| Finished Copper Weight | 1oz (1.4 mils) on outer layers |
| Via Plating Thickness | 20 µm |
| Surface Finish | Electroless Nickel Immersion Gold (ENIG) |
| Top Silkscreen | No |
| Bottom Silkscreen | No |
| Top Solder Mask | No |
| Bottom Solder Mask | No |
| Electrical Testing | 100% electrical test prior to shipment |
2. PCB STACKUP
| Layer | Thickness |
|---|---|
| Copper Layer 1 | 35 µm |
| F4BM220 Core | 1.575 mm |
| Copper Layer 2 | 35 µm |
3. PCB STATISTICS
Components: 43
Total Pads: 94
Through-Hole Pads: 56
Top SMT Pads: 38
Bottom SMT Pads: 0
Vias: 51
Nets: 2
4.ARTWORK AND QUALITY
Type of Artwork Supplied: Gerber RS-274-X
Quality Standard: IPC-Class-2
Availability: Worldwide
5.INTRODUCTION TO F4BM220
Wangling's F4BM220 laminates are developed through a precise formulation and pressing of fiberglass cloth, polytetrafluoroethylene (PTFE) resin, and PTFE film. Compared to F4B220, it offers improved electrical performance due to lower dielectric loss, higher insulation resistance, and enhanced stability, making it a suitable alternative to similar foreign products.
The F4BM220 and F4BME220 share the same dielectric layer but use different copper foil combinations: F4BM220 utilizes ED copper foil for applications without PIM requirements, while F4BME220 employs reverse-treated foil (RTF) for excellent PIM performance and reduced conductor loss.
By adjusting the ratio of PTFE to fiberglass cloth, both F4BM220 and F4BME220 achieve precise control over the dielectric constant, resulting in low loss and enhanced dimensional stability.
6.FEATURES OF F4BM220
Dielectric Constant (Dk): 2.2 ± 0.04 at 10GHz
Dissipation Factor: 0.001 at 10GHz
CTE:
X-axis: 25 ppm/°C
Y-axis: 34 ppm/°C
Z-axis: 240 ppm/°C (from -55°C to 288°C)
Thermal Coefficient of Dk: -142 ppm/°C (from -55°C to 150°C)
Moisture Absorption: ≤ 0.08%
Flammability Rating: UL-94 V0
7.TYPICAL APPLICATIONS
Microwave, RF, and radar systems
Phase shifters
Power dividers, couplers, and combiners
Feed networks
Phase-sensitive and phased array antennas
Satellite communications
Base station antennas