Enter the R-F775 flexible laminate. This material is not merely a component, it is a cornerstone of high performance electronic design. Engineered to meet the rigorous demands of today’s most challenging applications, the R-F775 represents a perfect synergy of material science and practical manufacturability.
In this article, we’ll discuss what really characterizes the Panasonic R-F775 Flexible 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 flexible pcb, so please feel free to contact us.

What is The Panasonic R-F775 Flexible Laminate?
Panasonic R-F775 flexible laminate is a high performance, halogen free flexible laminate designed to meet the rigorous demands of modern electronics. Engineered with advanced polyimide chemistry and optimized for both performance and processability, R-F775 delivers consistent, reliable results across a wide range of operating conditions. Whether you’re designing for medical equipment, avionics, or handheld computing devices, R-F775 provides the foundation for success.
Flexible printed circuit boards (PCBs) are driving innovation in nearly every electronics domain today from aerospace to wearable devices to medical instrumentation. In each case, the choice of the flexible laminate is one of the most critical decisions a designer or materials engineer makes, because the laminate underpins the mechanical, electrical, thermal, and reliability performance of the flex circuit. Among advanced options available, the R-F775 flexible laminate from Panasonic’s FELIOS family stands out as a high performance, adhesiveless polyimide laminate tailored for demanding applications.
The Panasonic R-F775 Flexible Laminate Data Sheet

The Features of Panasonic R-F775 Flexible Laminate
Glass Transition Temperature (Tg)
R-F775 laminate features a high glass transition temperature of 343 degree celsius, this is very high. ensuring dimensional stability and resistance to thermal deformation during lead free soldering processes and under elevated operating conditions.
Dielectric Constant (Dk)
With a dielectric constant (3.2 @1MHz), the Dielectric Constant of R-F775 laminate is a measure of its ability to store electrical energy in a capacitor like manner. The material maintains a stable dielectric constant, which is essential for high quality pcb boards.
Dissipation Factor (Df)
With a dissipation factor (0.002 @1MHz), it has a low Df, which minimizes energy losses as signals travel through the PCB. A lower Df translates to less signal loss, which is paramount for maintaining signal strength in high-speed applications.
Excellent Copper Foil Bond Strength
Strong adhesion between the copper foil and the dielectric substrate is essential to prevent delamination, especially during dynamic flexing or thermal cycling. R-F775 features excellent copper foil bond strength, reducing the risk of trace lifting or cracking. This makes it ideal for applications involving repeated bending or vibration, such as in handheld devices and aerospace systems.
Halogen and Antimony Free
Environmental and safety regulations are driving the electronics industry toward greener materials. It is fully halogen free and antimony free, eliminating the release of toxic, corrosive gases during fire or disposal. This makes it compliant with global environmental standards such as RoHS, REACH, and IEC 61249-2-21, and ensures safer operation in confined or sensitive environments.
UL 94-V0 Flammability Rating and 160°C Operating Temperature
Safety is a top priority in all electronic systems. R-F775 achieves a UL 94-V0 flammability rating, the highest level of flame resistance for plastic materials. This means it self extinguishes within 10 seconds after ignition and does not drip flaming particles. Additionally, it is rated for continuous operation at 160°C, making it suitable for high temperature environments such as engine compartments and industrial control systems.
Certified to IPC 4204/11, wide processing window
To ensure reliability and consistency, it is certified to IPC-4204/11, the industry standard for flexible laminates. This certification validates its performance in terms of thermal stability, mechanical strength, and chemical resistance. The wide processing window of R-F775 allows for greater flexibility in lamination, etching, and soldering processes, reducing the risk of defects and improving manufacturing yield.
31032 Tested, 340° C Tg, RoHS Compliant
The laminate have undergone rigorous testing, including 31032 tested, to verify its performance under extreme conditions. With a glass transition temperature (Tg) of 340°C, R-F775 maintains its mechanical and electrical properties at very high temperatures, far exceeding standard polyimide materials. This exceptional thermal stability makes it ideal for lead free assembly processes and high power applications.
What are The Applications of Panasonic R-F775 Flexible Laminate?
The unique combination of thermal stability, mechanical durability, and electrical performance makes R-F775 an ideal choice for a wide range of high reliability applications.
Avionics
In aerospace and defense systems, reliability is non-negotiable. It is used in avionics for flight control systems, communication modules, and sensor arrays. Its ability to withstand extreme temperatures, vibration, and mechanical stress ensures mission critical performance in the most demanding environments.
Computers
As computing power increases, so does the density and thermal load within servers, laptops, and workstations. The R-F775 finds extensive use in these applications for interconnecting hard drives, linking motherboards to displays in laptops, and within high speed server backplanes.
Medical Equipment
Medical devices require materials that are not only reliable but also safe and biocompatible. It is used in imaging systems, patient monitoring devices, and surgical tools. Its halogen free composition and thermal stability ensure safe operation in clinical environments.
Hand Held Computers
Compact, lightweight, and durable these are the hallmarks of modern handheld electronics. R-F775 enables the design of ultra-thin, flexible circuits that can be folded or bent to fit into tight spaces. Its excellent flexibility and fatigue resistance make it perfect for smartphones, tablets, and industrial handheld terminals.
Instrumentation
Precision instruments demand precision materials. R-F775 is used in oscilloscopes, multimeters, and data acquisition systems where stable electrical performance and long term reliability are essential. Its low signal loss and high thermal resistance ensure accurate measurements over time.
Manufacturing Advantages of The Panasonic R-F775 Flexible Laminate
Beyond its impressive datasheet and application range, the true value of the R-F775 is realized on the manufacturing floor and in the supply chain. It is designed not just for high performance, but for high manufacturability.
Superior Dimensional Stability
One of R-F775’s signature features is its exceptional dimensional stability, which is essential for achieving consistent trace alignment, tight registration, and minimal warpage or stress during processing (etching, thermal cycling, flexing). The laminates are engineered with a low modulus polyimide that is resilient against expansion or contraction.
Consistent Dielectric Thickness and Electrical Performance
Uniform dielectric thickness is crucial for maintaining consistent impedance and signal integrity. The laminate is manufactured with tight tolerances to ensure consistent dielectric thickness across the entire panel. This results in stable electrical performance, making it suitable for high speed digital and analog applications where signal fidelity is paramount.
Cost Effective and Readily Available
Perhaps one of the most compelling practical advantages of the laminate is its cost effectiveness and ready availability. High performance materials often come with a premium price tag and long lead times. The R-F775 strikes an excellent balance, offering top tier performance at a competitive cost. This is achieved through efficient manufacturing processes and economies of scale.
Ultimately, In the complex ecosystem of electronic product development, every decision carries weight. The selection of your flexible laminate is one of the most consequential. The R-F775 flexible laminate emerges as a superior solution, not because it excels in just one area, but because it delivers a harmonious blend of mechanical robustness, electrical consistency, thermal endurance, environmental safety, and manufacturing friendliness. By choosing R-F775 laminate, manufacturers can achieve superior performance, enhanced safety, and extended product lifetimes.
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