TMM4 60mil Core Laminate raw Material built for 2-Layer High-Frequency PCB using in Patch Antennas

2-Layer High-Frequency PCB with TMM4 Core Material

As a supplier specializing in high-frequency circuit boards, we are proud to offer this robust 2-layer PCB, designed for demanding RF and microwave applications. Built using Rogers TMM4 thermoset microwave material, this PCB combines exceptional electrical performance, strong mechanical properties, and high reliability, making it ideal for advanced communication systems, power amplifiers, and satellite technologies. Below, we detail the construction, material properties, and benefits of this PCB.

PCB Construction Details

PCB Features and Statistics

This PCB has been optimized for compact yet efficient circuit designs, with the following specifications:

Components: 32

Total Pads: 65 (39 thru-hole pads and 26 SMT pads on the top layer)

Vias: 78

Nets: 2

About TMM4 Material

The Rogers TMM4 laminate is a high-performance, ceramic-filled thermoset polymer composite specifically developed for high-frequency and microwave applications. Its unique properties make it an excellent alternative to traditional PTFE laminates, offering high reliability and compatibility with standard PCB fabrication processes.

Key Material Features

• Dielectric Constant (Dk): 4.50 ± 0.045 (stable over a wide frequency range)
• Dissipation Factor (Df): 0.0020 at 10GHz, ensuring minimal signal loss
• Thermal Coefficient of Dk: 15ppm/°K
• Coefficient of Thermal Expansion (CTE): Matched to copper for improved thermal reliability (16 ppm/°K in x and y axes; 21 ppm/°K in z-axis)
• Decomposition Temperature (Td): 425°C, providing excellent thermal stability
• Moisture Absorption: 0.07%–0.18%, ensuring performance in humid environments
• Thermal Conductivity: 0.7 W/m·K for efficient heat dissipation

TMM4 laminates are particularly well-suited for wire-bonding applications, resisting pad lifting and substrate deformation. Their mechanical and chemical resistance ensures minimal damage during fabrication and extended product lifespan.

Benefits of Using TMM4-Based PCBs

High-Frequency Performance:
The low Df and stable Dk provide excellent signal integrity, ensuring consistent performance in RF and microwave circuits.

Reliability:
TMM4 materials exhibit high mechanical strength, excellent plated-through-hole reliability, and resistance to creep and cold flow, even under extreme conditions.

Fabrication Compatibility:
Unlike PTFE laminates, TMM4 does not require specialized processing techniques, making it cost-effective and compatible with standard PWB processes.

Durability in Harsh Environments:
The material resists moisture, high temperatures, and harsh chemicals, ensuring long-term stability and reliability.

Applications

This PCB is ideal for a range of high-frequency applications, including:

1. RF and Microwave Circuitry
2. Power Amplifiers and Combiners
3. Satellite Communication Systems
4. Global Positioning System (GPS) Antennas
5. Patch Antennas and Filters
6. Chip Testers
7. Dielectric Polarizers and Lenses

Conclusion

With its Rogers TMM4 core, this 2-layer PCB is engineered to support high-frequency applications that require low signal loss, excellent thermal stability, and high mechanical strength. Its hybrid design and adherence to IPC-Class-2 standards ensure consistent quality and performance, making it the perfect choice for RF and microwave engineers worldwide.

Bicheng PCB is headquartered in Shenzhen, a city with great economic vitality. Based in China, we adhere to the philosophy of servicing small and medium sized companies offering variety of circuit boards to meet the demands of market.

We maintain the highest standards which support products that exhibit exceptional quality, performance and reliability. The circuit board ranges from conventional FR-4 to PTFE, metal core to flexible circuits which are used in the industries of home appliances, portable and consumable electronics, medical filed, aerospace as well as telecommunications etc.

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