2 Layer TFA615 PCB 0.508mm (20mil) Thick with ENIG Finish for Aerospace and RF Applications
1.TFA Series Introduction
The TFA series represents an advanced PTFE-ceramic composite dielectric substrate manufactured through a proprietary process (not traditional glass fiber impregnation). This aerospace-grade material features:
Uniform nano-ceramic/resin matrix eliminating fiberglass effects
Excellent frequency stability with minimal dielectric loss
Low anisotropic expansion (X/Y/Z CTE matched to copper)
Four dielectric constant options: 2.94 (TFA294), 3.0 (TFA300), 6.15 (TFA615), 10.2 (TFA1020)
Superior thermal/mechanical properties for high-reliability applications
2.TFA615 Key Features
Dielectric Constant (Dk): 6.15±0.12 @10GHz
Dissipation Factor: 0.0015 @10GHz, 0.0017 @20GHz
CTE: X/Y-16 ppm/°C, Z-29 ppm/°C (-55°C to 288°C)
Thermal Conductivity: 0.8 W/mK
Moisture Absorption: 0.06%
UL 94-V0 Flame Rated
Decomposition Temp (Td): 503°C
3.Benefits
Eliminates fiberglass wave propagation issues
Stable dielectric properties across temperatures
Aerospace-grade reliability
Excellent high-frequency performance
Compatible with standard PCB processing
4.PCB Construction Details
| Specification | Value |
|---|---|
| Base Material | TFA615 |
| Layer Count | 2 layers |
| Board Dimensions | 206mm × 54mm (±0.15mm) |
| Minimum Trace/Space | 4/6 mils |
| Minimum Hole Size | 0.3mm |
| Blind Vias | No |
| Finished Board Thickness | 0.6mm |
| Copper Weight | 1oz outer layers |
| Via Plating Thickness | 20μm |
| Surface Finish | Immersion Gold (ENIG) |
| Silkscreen | None (Top & Bottom) |
| Solder Mask | None (Top & Bottom) |
| Electrical Test | 100% tested pre-shipment |
5.PCB Stackup (2-Layer Rigid Structure)
Copper Layer 1: 35μm
TFA615 Core: 0.508mm (20mil)
Copper Layer 2: 35μm
6.PCB Statistics:
Components: 35
Pads: 153 (121 thru-hole, 32 SMT)
Vias: 77
Nets: 2
7.Typical Applications
Aerospace/avionics systems
Microwave antennas & radar systems
Satellite communication equipment
Phased array antennas
RF power amplifiers
8.Quality Assurance
IPC-Class 2 compliant
100% electrical tested
Global availability
Gerber RS-274X support