Astra MT77 2-Layer 10mil ENIG PCB for Automotive Radar Applications
1.Introduction of Astra MT77
Astra MT77 materials are a breakthrough, very low-loss dielectric constant (Dk) product for millimeter wave frequencies and beyond. Astra MT77 laminate materials exhibit exceptional electrical properties which are very stable over a broad frequency and temperature range. Astra MT77 is suitable for many of today's commercial RF/microwave printed circuit designs. It features a dielectric constant (Dk) that is stable between -40°C and +140°C at up to W-band frequencies. In addition, Astra MT77 offers an ultra-low dissipation factor (Df) of 0.0017, making it a cost-effective alternative to PTFE and other commercial microwave laminate materials.
2.Key Features
Stable Dielectric Constant: 3.0 at 2 and 10 GHz/23°C
Ultra-Low Loss: Dissipation factor of 0.0017 at 2 and 10GHz
Strong Bonding: Peel Strength 1oz, 5.7 lb/inch
Environmental Resistance: Moisture Absorption 0.1%
Dimensional Stability: CTE X-axis 12 ppm/°C, Y-axis 12 ppm/°C, Z-axis 250-350 ppm/°C
High Temperature Performance: Tg 200°C by DSC
Safety Certified: UL 94-V0
Modern Manufacturing: Lead free Process compatible
3.Processing Advantages
Manufacturing Efficiency: FR-4 process compatible, Short lamination cycle
Cost Effectiveness: Reduced drill wear, No plasma desmear required
Quality Assurance: Good flow and fill, Dimensional stability
Design Flexibility: Multiple lamination cycles, Any layer technology compatible
Advanced Capabilities: HDI technology compatible, VIPPO design compatible
4.PCB Construction Details
| Parameter | Specification |
|---|---|
| Base Material | Astra MT77 |
| Layer Count | 2 layers |
| Board Dimensions | 48.5mm × 43.3mm = 1PC, ±0.15mm |
| Minimum Trace/Space | 4/4 mils |
| Minimum Hole Size | 0.2mm |
| Blind Vias | No |
| Finished Board Thickness | 0.33mm |
| Finished Cu Weight | 1oz (1.4 mils) |
| Via Plating Thickness | 20 μm |
| Surface Finish | Immersion Gold |
| Top Silkscreen | White |
| Bottom Silkscreen | No |
| Top Solder Mask | Green |
| Bottom Solder Mask | Green |
| Electrical Test | 100% tested prior to shipment |
5.PCB Stackup (12-Layer Rigid Structure)
Copper Layer 1 - 35 μm
MT77 Core - 0.254 mm (10mil)
Copper Layer 2 - 35 μm
6.PCB Statistics:
Components: 10
Total Pads: 45
Thru Hole Pads: 25
Top SMT Pads: 20
Bottom SMT Pads: 0
Vias: 21
Nets: 2
7.Typical Applications
Long antennas and radar applications for automobiles
Adaptive cruise control systems
Pre-crash detection systems
Blind spot detection systems
Lane departure warning systems
Stop and go systems
8.Quality Assurance
Artwork Format: Gerber RS-274-X
Accepted Standard: IPC-Class-2
Availability: Worldwide
