Panasonic MEGTRON M R-5735 laminate offers a low dissipation factor, the low Dk and Df value contribute to the electrical performance of this material. And the dielectric constant is an electrical property that determines signal integrity.
In this article, we’ll discuss what really characterizes the high speed MEGTRON M R-5735 laminate. The relevant information is available for pcb design engineers to refer to in the selection of materials, And you can also call QFPCB to discuss. QFPCB offers the best services when it comes to the high speed print circuit board, so please feel free to contact us.

What is the Panasonic MEGTRON M R-5735 Laminate?
Panasonic MEGTRON M R-5735 laminate is a low-loss multilayer circuit board material with excellent thermal resistance, making it ideal for high-capacity data transmission in routers and servers used in high-end applications. This material significantly enhances the performance of 5G mobile communication systems by supporting greater data capacity and reducing signal loss. Additionally, Panasonic MEGTRON M R-5735 laminate is halogen-free, meaning it contains no halogen constituents, which makes it environmentally friendly.
With its low dissipation factor and dielectric constant, this material delivers superior performance in various applications. Its ability to minimize signal loss ensures strong signal integrity, which is critical for PCBs in communication systems. Notably, the dissipation factor of Panasonic MEGTRON M R-5735 is lower than that of MEGTRON R-5375, further enhancing its suitability for high-performance applications.
Moreover, Panasonic MEGTRON M R-5735 laminate exhibits excellent mechanical and thermal properties, enabling it to maintain high performance even under extreme temperature conditions. Its heat resistance not only ensures reliability but also supports efficient data transmission in demanding environments.
Panasonic MEGTRON M R-5735 Laminate Data Sheet

Features of Panasonic MEGTRON M R-5735 Laminate
High Glass Transition Temperature (Tg)
With a Tg exceeding 185°C, these laminates maintain structural integrity and electrical stability even under high thermal stress, making them ideal for high temperature environments. these laminates maintain excellent mechanical properties at elevated temperatures, ensuring stability under thermal stress.
Low Dielectric Constant (Dk)
A consistently low Dk value (typically 3.92 at 1 GHz) ensures minimal signal delay and loss, critical for high-speed signal transmission. making it ideal for high-speed digital and RF circuits.
Low Dissipation Factor (Df)
The ultra-low dissipation factor (0.005 at 1 GHz) minimizes energy loss, enhancing signal clarity in high speed circuits. Ensures low energy dissipation during transmission, contributing to higher efficiency and performance.
Low Water Absorption Rate
Low moisture uptake preserves electrical characteristics over the product lifecycle and enhances reliability in humid environments. A moisture absorption rate of <0.14% prevents performance degradation in humid conditions, ensuring long-term reliability.
High Decomposition Temperature (Td)
Offering excellent resistance to soldering and reflow processes, as well as to harsh thermal cycling. With Td exceeding 360°C, the material resists thermal degradation during high-temperature assembly processes like lead-free soldering.
Low Coefficient of Thermal Expansion (CTE)
The CTE closely matches that of copper, reducing the risk of delamination and via cracks during thermal cycling. X–Y CTE values around 12 ppm/°C align closely with copper and other metal conductors, reducing thermomechanical stress and improving registration accuracy in multilayer PCBs.

Applications of Panasonic MEGTRON M R-5735 Laminate
The unique combination of electrical, thermal, and mechanical properties enables MEGTRON M R-5735 to excel in advanced industries:
ICT Infrastructure Equipment
High-speed routers, 5G base stations, and data center hardware benefit from its low Dk/Df for faster data transfer and reduced latency. The combination of low dielectric loss and high thermal stability ensures reliable data transmission and long-term performance in 5G and beyond networks.
Supercomputers
Supports the development of high speed computing systems requiring low-loss and high reliability materials. Supports high speed PCB designs required for next-gen computing architectures.
Measuring Instruments
The laminate’s dimensional stability and low dielectric variation over temperature ensure accurate, repeatable measurements in laboratory and field environments. Ensures precise and stable performance in measuring instruments used in research and industrial applications.
Antennas
Provides robust performance in antenna applications, including base stations and other wireless communication systems. R-5735’s low loss tangent and moisture resistance contribute to consistent antenna performance, even in adverse weather conditions.
Processing Advantages of Panasonic MEGTRON M R-5735 Laminate
Beyond its intrinsic material benefits, MEGTRON M R-5735 offers several practical advantages during PCB fabrication and end use:
UL 94V-0 Flammability Rating
R-5735 meets stringent flammability standards, providing enhanced safety for telecom racks, data centers, and industrial installations. Meets stringent fire safety standards, eliminating the need for additional flame-retardant treatments.
High Heat Resistance
Compatibility with lead free soldering profiles and multiple reflow cycles reduces the risk of delamination during assembly, while also supporting wave soldering and selective soldering processes. Withstands multiple reflow soldering cycles and harsh assembly conditions without warping or degradation.
Environmentally Safe
Compliant with RoHS and halogen-free requirements, aligning with global sustainability goals. This laminate is free of halogenated flame retardants and complies with RoHS and REACH regulations, making it suitable for “green” electronics initiatives.
Consistent Performance
Excellent dimensional stability and ease of drilling/machining streamline PCB fabrication, reducing production costs and defects. High flexural strength and toughness facilitate precision punching, milling, and drilling, allowing for tight tolerances and complex via structures without cracking or chipping.
MEGTRON M R-5735 combines advanced thermal, electrical, and mechanical properties to address the most stringent requirements of modern electronics. Its low-loss dielectric profile, superior thermal stability, and robust processing characteristics make it the material of choice for ICT infrastructure, high performance computing, precision instrumentation, and RF applications. For engineers and designers pushing the limits of technology, MEGTRON M R-5735 is a trusted partner in innovation.
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