2L MT77 PCB 10mil Material Low-Loss Circuit Board
This 2-layer rigid PCB is built with Astra MT77--an advanced low-loss dielectric material--optimized for millimeter-wave and RF/microwave commercial applications.
PCB Specifications
| Parameter |
Specification |
| Layer Count |
2-layer rigid PCB |
| Base Material |
Astra MT77 |
| Board Dimensions |
48.5mm x 43.3mm (1 piece), tolerance ±0.15mm |
| Finished Board Thickness |
0.33mm |
| Finished Copper Weight |
1oz (1.4 mils / 35μm) |
| Via Plating Thickness |
20μm |
| Minimum Trace/Space |
4 mils / 4 mils |
| Minimum Hole Size |
0.2mm |
| Vias |
21 total (no blind vias) |
| Surface Finish |
Immersion Gold |
| Silkscreen |
Top: White; Bottom: No |
| Solder Mask |
Top: Green; Bottom: Green |
| Quality Assurance |
100% Electrical test prior to shipment |
| Accepted Standard |
IPC-Class-2 |
| Availability |
Worldwide |
PCB Stack-up (Top to Bottom)
| Layer Sequence |
Layer Type |
Specification |
Thickness |
| 1 |
Copper Layer (Top - L1) |
Copper_layer_1 |
35μm (1oz) |
| 2 |
Base Material |
Astra MT77 |
0.254mm (10mil) |
| 3 |
Copper Layer (Bottom - L2) |
Copper_layer_2 |
35μm (1oz) |
Astra MT77 Material Overview
Astra MT77 is a breakthrough dielectric material designed for millimeter-wave frequencies and beyond. It delivers exceptional electrical performance that remains stable across a broad frequency range and temperatures (-40°C to +140°C), even up to W-band frequencies. As a cost-effective alternative to PTFE and other commercial microwave laminates, it meets the demands of modern commercial RF/microwave printed circuit designs while offering ultra-low loss and reliable performance.
Key Features of Astra MT77
| Property |
Specification |
| Dielectric Constant (Dk) |
3.0 (2GHz/23°C; 10GHz/23°C) |
| Dissipation Factor (Df) |
0.0017 (2GHz; 10GHz) |
| Peel Strength (1oz Copper) |
5.7 lb/inch |
| Moisture Absorption |
0.1% |
| Coefficient of Thermal Expansion (CTE) |
X-axis: 12 ppm/°C; Y-axis: 12 ppm/°C; Z-axis: 250-350 ppm/°C |
| Glass Transition Temperature (Tg) |
200°C (DSC method) |
| Flammability Rating |
UL 94-V0 |
| Process Compatibility |
Lead-free compatible |
Processing Advantages
Astra MT77 simplifies manufacturing with multiple practical benefits:
- Compatible with standard FR-4 processing workflows (no special equipment needed)
- Short lamination cycles for improved production efficiency
- Reduced drill wear to lower manufacturing costs
- No plasma desmear required, streamlining processing steps
- Good flow and fill characteristics for reliable layer adhesion
- Strong dimensional stability across production and operating conditions
- Supports multiple lamination cycles for flexible manufacturing
- Compatible with any layer technology, HDI, and VIPPO designs
Typical Applications
This 2-layer Astra MT77 PCB is specifically tailored for automotive RF/microwave systems, including:
- Long-range antennas and radar for adaptive cruise control
- Pre-crash detection systems
- Blind spot monitoring
- Lane departure warning systems
- Stop-and-go systems