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What is Panasonic R-5515 – The Halogen-Free Ultra-low Transmission Loss Multi-layer Circuit Board?

Panasonics developed this material which is great for the millimeter wave antenna, which helps in achieving the highest low loss of transmission in the industry with the thermosetting resin.

As advanced driving support systems (ADAS) and autopilot came to be, millimeter wave radar plays a useful role as a sensing technology, which is used in supporting these systems. With respect to the antenna substrate for the millimeter wave transceivers, low loss of transmission is necessary.

Now, as the antenna PCB’s substrate, the fluororesin substrate is majorly used. Moreover, as a result of the resin’s characteristics, processing the substrate is difficult and there is also an issue of high cost. This time around, using the Resin design technology of Panasonic as well as the low coarsening bonding technology of the copper foil, it became possible for the ultra-low halogen-free transmission loss of the substrate material with great low loss of transmission as well as processability to happen.

What is the Panasonic R-5515 Halogen-Free Material?

The Panasonic R-5515 halogen-free material is useful in offering some insulation to printed circuit boards. This is based on the main thermosetting resin technology of Panasonic and has great dielectric properties.

This dielectric material features great adhesion strength, as well as copper foils of low profile. This material has a dielectric constant of 3, while its dissipation factor is 0.002. This material ensures multilayer constructions, as well as improves the design flexibility of circuit boards having high frequency.

It increases the efficiency of the millimeter wave antenna signals. It achieves this by reducing the signal losses. You can process the dielectric material making use of the standard manufacturing equipment of the standard circuit board and need no special chemical processes or solutions. This is great for automotive applications, wireless antenna, mm-Wave radar, and more.

Features of the Panasonic R-5515 Halogen-Free Material

Below are the characteristics and features of this material

Transmission Loss

This material has a low loss of transmission. This makes it very useful for millimeter wave antenna low loss and high efficiency of the millimeter wave antenna. Viewing from the cost and processability of the antenna substrate, the demand has the capability to replace this material with very high versatility. This is known as the fluorine substrate.

Via the resin design technology, as well as the bonding technology, Panasonic has developed a material which has the capability of realizing the lowest loss of transmission in the thermosetting resin.

Great PCB Processability

Its great PCB processability helps in reducing the cost of PCB processing. Copper plating and drilling of the base material of the PTFE is somehow difficult. The processing of this can be done using the general equipment of printed circuit boards.

As a result of the resin’s characteristics, copper plating and hole drilling is difficult when manufacturing the fluororesin substrate. Due to the fact that you’ll need a specific equipment for manufacturing, the cost involved is very high.

Because the material is known as a thermosetting resin type, processing it is easy using the equipment already available for the substrate. Therefore this material can serve as a substitute for the substrate material, which contributes to the reduction of the substrate’s processing cost.

Useful in processing mixed pressure printed circuit board with FR4

The Panasonic R-5515 is a resin material. This makes it very easy to form just the same time as the FR4. With the miniaturization development and the lost cost of the wave band module, then there are higher multilayer requirements of the antenna module substrate.

Also, due to the fact that the fluororesin substrate is a thermoplastic resin, forming just the same time with the glass substrate material is difficult.

What are the Applications of the Panasonic R-5515?

The Panasonic R-5515 is useful in

  • Millimeter wave antenna printed circuit boards
  • High-speed PCB transmission
  • Wireless communication

General Properties of the Panasonic R-5515 Halogen-Free Material

The general properties of this material are as follows:

Glass transition temperature (Tg)

Making use of the DMA test method, the Panasonic R-5515 material has a glass transition value of 200 degrees Celsius. Furthermore, for the TMA test method, the Panasonic R-5515 material has a value of 170 degrees Celsius.

Decomposition Temperature

Using the TGA test method, the Panasonic R-5515 material has a decomposition temperature of 410 degrees Celsius. This thermal decomposition value signifies the temperature at which this material decomposes chemically.

Coefficient of Thermal Expansion

At the Z-axis, the Panasonic R-5515 material has a Coefficient of thermal expansion (CTE) value of 50 ppm/℃ at α1. While at α2, its CTE value is 300 ppm/℃. Also, for the X axis, they have a CTE value at α1 to be 19 – 21 ppm/℃, while for the Y-axis, this material has a value at α1 to be 19 -21 ppm/℃.  

What this property indicates is the extent at which the material can expand anytime it is heated.

Dielectric Constant (Dk)

The Panasonic R-5515 material has a dielectric constant of 3.06 at 14 GHz. Dielectric constant refers to the quantity that measures a material’s ability to store some electrical energy in a given electric field

Dissipation Factor (Df)

This material has a dissipation factor of 0.002 at 14 GHz. This value indicates the material’s inefficiency to act like an insulator. Furthermore, this material has a low dissipation factor; therefore, it is very efficient as an insulating material.

Delamination Time (T288)

The Panasonic R-5515 material has a delamination time that is greater than 120 minutes without copper. With copper, this material has a delamination time greater than 20 minutes as well. Furthermore, delamination time tells the time needed for a PCB’s base material to delaminate anytime when subjected to a 288 degrees Celsius temperature using TMA (Thermomechanical analyzer). Also, delamination refers to separating each of the layers.


Here comes the end of our article on the Panasonic R-5515. You can see the great properties of this material and why it is useful in different applications. The fact that it is halogen free says more about this unique material. It will surely solve your PCB needs.