Double-Sided Copper Clad Laminate with Astra MT77 Material
This double-sided copper clad laminate, built using Astra MT77, is
a premium solution for high-performance RF and millimeter-wave
applications. Designed for applications requiring exceptional
signal integrity and low-loss performance, this laminate is
suitable for radar, automotive electronics, and high-frequency RF
systems. Its combination of stable dielectric properties, thermal
reliability, and manufacturing efficiency makes it a standout
choice for demanding industries.
Key Material Details
| Parameter | Specification |
| Base Material | Astra MT77 |
| Copper Layers | Double-sided, 1oz (35μm) |
| Dielectric Thickness | 0.254mm (10mil) |
| Finished Laminate Thickness | 0.33mm |
| Surface Finish | Immersion Gold (ENIG) |
| Minimum Trace/Space | 4/4 mils |
| Minimum Hole Size | 0.2mm |
| Via Plating Thickness | 20μm |
| Solder Mask | Top: Green, Bottom: Green |
| Silkscreen | Top: White, Bottom: None |
Key Features of Astra MT77:
Dielectric Constant (Dk): 3.0 at 2GHz and 10GHz, ensuring stable
signal transmission over a wide frequency range.
Dissipation Factor (Df): Ultra-low 0.0017, minimizing signal loss
at high frequencies and improving efficiency for RF and
millimeter-wave circuits.
Thermal Stability: High Tg of 200°C and thermal decomposition
temperature (Td) of 410°C, ensuring reliable performance under
extreme conditions.
Moisture Resistance: Low moisture absorption (0.1%), ensuring
dimensional stability and electrical consistency even in humid
environments.
CTE (Coefficient of Thermal Expansion): X/Y-axis: 12 ppm/°C,
Z-axis: 250-350 ppm/°C
Ensures stable performance and excellent plated through-hole (PTH)
reliability during thermal cycling.
Advantages of This Double-Sided Copper Clad Laminate
- The stable Dk and ultra-low Df of Astra MT77 ensure minimal signal
loss, making it ideal for high-frequency and millimeter-wave
applications, such as 77GHz automotive radar.
- With a high Tg of 200°C and low Z-axis CTE, this laminate offers
excellent thermal stability and dimensional reliability during
high-temperature processes and operation.
- The laminate’s peel strength (5.7 lb/inch) ensures robust copper
adhesion, even during repeated thermal stress.
- Astra MT77 is FR-4 process compatible, allowing standard
manufacturing techniques to be used without the need for
specialized equipment. This reduces production costs and simplifies
manufacturing for RF designs.
- Features such as short lamination cycles, good flow and fill, and
no requirement for plasma desmear further enhance production
efficiency.
- At just 0.33mm thick, this laminate is ideal for compact,
space-constrained applications while maintaining the robustness
needed for high-frequency circuits.
Applications of Astra MT77 Double-Sided Copper Clad Laminate
Automotive Radar Systems
Adaptive Cruise Control (ACC)
Blind Spot Detection (BSD)
Lane Departure Warning Systems
Pre-Crash Warning Systems
Processing Advantages
- FR-4 Compatibility: Can be processed using standard FR-4
manufacturing equipment, reducing costs and simplifying production.
- Short Lamination Cycles: Reduces manufacturing time and increases
throughput.
- Reduced Drill Wear: Improves tool life and enhances production
efficiency.
- No Plasma Desmear Required: Simplifies the via preparation process.
- Dimensional Stability: Ensures consistent results even after
multiple lamination cycles.
- Lead-Free Solder Compatibility: Fully compatible with modern
lead-free soldering processes.
Conclusion
This double-sided copper clad laminate with Astra MT77 is a
high-performance solution for RF and microwave designs requiring
excellent signal integrity, low loss, and thermal reliability. Its
FR-4 compatibility and cost-effectiveness make it an attractive
alternative to PTFE-based materials for high-frequency
applications. However, its focus on specialized RF applications and
limited layer count may restrict its use in general-purpose or
complex designs.
