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

5. PCB Stackup (2-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