This 6 Layer MT77 Astra PCB is a premium ultra-low loss high-frequency circuit board engineered for high-precision RF and microwave applications. Fabricated with three pieces of 0.127mm MT77 Astra core laminates and matched MT77 Astra prepreg, this custom high-frequency PCB delivers a finished board thickness of 0.994mm. It adopts a professional hybrid copper structure with 0.5oz inner copper layers for fine-line routing and 1oz outer copper layers for stable high-frequency signal transmission.
Featuring Immersion Silver surface finish, green solder mask, and white silkscreen, this automotive-grade RF PCB adopts advanced industrial processes including G12 resin plugging with full electroplating filling and customized L1-L2, L5-L6 blind vias. Fully compatible with FR-4 fabrication workflow, HDI layout and VIPPO design, the MT77 Astra 6-layer PCB features ultra-low 0.0017 Df loss and wide-temperature stable Dk performance. As a cost-effective alternative to expensive PTFE microwave substrates, it is widely used for automotive radar, long-range antennas and commercial microwave communication devices, certified with UL E41625 and RoHS compliance.
What Is MT77 Astra? Low Loss High-Frequency PCB Material
MT77 Astra is a professional thermoset high-frequency laminate customized for modern commercial RF, microwave and automotive radar PCB designs. This high-performance substrate maintains extremely stable dielectric constant (Dk) across a wide temperature range from -40°C to +140°C and supports W-band high-frequency operation. Different from conventional high-loss PCB materials, MT77 Astra eliminates electrical parameter drift under extreme thermal and frequency changes, ensuring consistent and reliable circuit output in complex working environments.
Featured with an ultra-low dissipation factor of Df=0.0017, MT77 Astra effectively minimizes high-frequency signal attenuation and transmission loss, delivering microwave-level electrical performance at a much lower production cost than PTFE materials. This high-frequency laminate boasts excellent manufacturability, full FR-4 process compatibility, superior dimensional stability and multi-lamination adaptability. Supporting HDI miniaturization, any-layer interconnection and VIPPO structural design, MT77 Astra is fully lead-free assembly compatible, UL certified and RoHS compliant, ideal for mass production of high-end RF electronic products.
MT77 Astra PCB Features
| Core Feature | Technical Parameter |
| Ultra-Low Dissipation Factor | Df = 0.0017 @ high-frequency band |
| Wide-Range Dk Stability | Stable Dk: -40°C to +140°C, W-band capable |
| PTFE Alternative Performance | Non-PTFE high-frequency composite substrate |
| Hybrid Copper Thickness Design | 0.5oz inner copper / 1oz outer copper |
| G12 Resin Plugging Process | G12 resin plugging + full electroplating filling |
| Custom Blind Via Structure | L1-L2, L5-L6 controlled blind vias |
| Global Industrial Certification | UL E41625, RoHS, Lead-free assembly compatible |
MT77 Astra PCB Processing & Manufacturing Advantages
Compared with traditional high-frequency substrates, MT77 Astra PCB material combines premium electrical performance and excellent mass-production manufacturability, supporting high-precision HDI multi-layer PCB fabrication with higher yield and lower cost:
Full FR-4 Process Compatibility: No special equipment required; fully adaptable to standard FR-4 production lines, effectively lowering technical thresholds and manufacturing costs for high-frequency PCB production
High-Efficiency Lamination Performance: Features short lamination cycles, supports repeated multi-lamination processes, and provides excellent resin flow and filling effect for complex multi-layer structures
Simplified Machining Workflow: Reduces drill bit wear during hole processing and eliminates plasma desmear procedures, greatly improving production efficiency and finished product yield rate
Superior Dimensional Stability: Maintains stable board flatness and precise dimensional tolerance after repeated thermal cycling, avoiding board deformation and layer misalignment defects
Advanced Design Compatibility: Fully compatible with any-layer interconnection, HDI miniaturization technology and VIPPO design, supporting high-density compact high-frequency PCB layout
6 Layer MT77 Astra PCB Full Specifications
| Parameter Item | Detailed Specification |
| Base Material | MT77 Astra ultra-low loss high-frequency laminate + matching prepreg |
| PCB Layers | 6-layer rigid high-frequency PCB structure |
| Board Size | 131mm × 107mm (custom single piece) |
| Finished Board Thickness | 0.994mm |
| Copper Weight | Inner Layer: 0.5oz; Outer Layer: 1oz |
| Surface Finish | Immersion Silver, anti-oxidation, stable high-frequency conductivity |
| Solder Mask & Silkscreen | Green solder mask + white silkscreen for durable protection and clear marking |
| Special Processes | G12 resin hole plugging + full electroplating filling; L1-L2 & L5-L6 blind vias |
6-Layer MT77 Astra PCB Stack-up Structure
MT77 Astra Material Technical Specifications
| Item | Detailed Specification |
| Standard Laminate Thickness | 2.5 / 5 / 7.5 / 10 / 12.5 / 15 / 20 / 30 / 60 mil (0.0635mm–1.50mm) |
| Copper Foil Type | HVLP (VLP2) ≤2.5μm Rz JIS, embedded resistor foil optional |
| Available Copper Weight | 0.5oz / 1oz / 2oz (18μm / 35μm / 70μm), custom ultra-thin copper available |
| Prepreg Service | Professional panel tooling + moisture-proof vacuum barrier packaging |
Custom PCB Service & Quality Assurance
Artwork Format: We support standard Gerber RS-274-X design files for custom MT77 Astra high-frequency PCB manufacturing, ensuring precise and repeatable fabrication results for all RF and microwave circuit projects.
Strict Quality Control: All MT77 Astra 6-layer PCBs comply with IPC-Class-2 standards. Every finished board undergoes 100% pre-shipment electrical testing to eliminate open/short defects and guarantee stable batch consistency.
Global Custom Service: We provide one-stop customized PCB solutions including professional technical consultation, personalized quotation and worldwide shipping for all PCB orders.
MT77 PCB Main Applications
- Automotive Radar Systems
- Long-Range Communication Antennas
- RF & Microwave Circuit Modules
- Vehicle-Mounted High-Frequency Electronics
- W-Band High-Frequency Devices
Conclusion
This 6 Layer MT77 Astra Ultra-Low Loss RF PCB is a high-performance microwave-grade circuit board optimized for automotive radar and high-frequency communication devices. With an ultra-low dissipation factor of 0.0017, stable dielectric performance from -40°C to +140°C and full FR-4 process compatibility, it delivers PTFE-level RF performance at lower manufacturing costs. Equipped with G12 resin plugging, precision blind via structure and hybrid copper thickness design, this certified high-frequency PCB is the ideal cost-effective replacement for imported microwave substrates, suitable for mass production of high-end automotive radar, long-range antenna and precision microwave electronic products.
