6-Layer MT77 PCB Ultra Low Loss resin plugging Blind Vias Circuit

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

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

6-Layer MT77 Astra PCB Stack-up Structure

MT77 Astra Material Technical Specifications

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.