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What are the Properties, Advantages, and Applications of the Isola P95/P25 PCB Material?

The fabrication of printed circuit boards requires some raw materials. The PCB laminate serves as the building block of PCBs. Therefore, quality and performance are important factors to consider when using laminates. Some laminates are specially designed to meet the needs of high-performance applications. The Isola P95/P25 is one of such laminates. In this article, we will look further into what the Isola P95/P25 PCB material offers.

What is Isola P95/P25?

 Isola P95/P25 PCB is a core material (P95) and a polyimide-based prepreg (P25). This material is specifically designed for high temperature PCB applications. Also, Isola P95/P25 PCB material features a polyimide resin system. This system has HB flammability ratings. Therefore, it is ideal for industrial or commercial applications that demand superior performance.

Furthermore, this PCB laminate uses a thermoplastic and polyimide blend resin. Therefore, its curing doesn’t require Methylenedianiline. Furthermore, this produces a polymer featuring a high Tg value. Also, it has no difficult brittleness. Isola P95/P25 PCB features no low initial peel strength associated with regular thermoset polyimides.

Isola P95/P25 PCB material features a high Tg value and Td value. With a Tg value of 260 degrees Celsius, this material offers great thermal performance. Also, this material features a low dielectric constant and dissipation factor.

Properties of the Isola P95/P25 PCB Material

High glass transition temperature

Isola P95/P25 PCB material features a high Tg value. This value is 260 degrees Celsius. Therefore, this material can withstand high temperatures. Also, it offers exceptional thermal performance. This high Td value offers enhanced chemical and mechanical resistance to heat

Low dissipation factor

The Df of this material is 0.021 at 10GHz. However, the dissipation factor varies across a frequency range. For instance, the Df of this material is 0.0135 at 100 GHz.

Very high decomposition temperature

The decomposition temperature of Isola P95/P25 is 416 degrees Celsius. Also, this Td value is extremely high. The more the Td value, the better the material’s performance.

Low coefficient of thermal expansion

Isola P95/P25 PCB material features a low CTE. Also, this material can hardly expand when exposed to varying temperature degrees. Therefore, this PCB material can survive in high temperatures in an operational environment.

Peel strength

The peel strength of Isola P95/P25 PCB material after thermal stress is 1.25 (7.0) N/mm(Ib/inch). After process solutions, the peel strength is 1.14 (6.5) N/mm (Ib/inch).

Low moisture absorption

The moisture absorption of this material is 0.5%. Also, Isola P95/P25 PCB material rarely absorbs water and can withstand a humid environment.

Low dielectric constant

The dielectric constant of Isola P95/P25 PCB material is 3.73 at 5 GHz and 10 GHz. Also, this value is very low. Materials with low dielectric constant have a good insulator system.

The Impact of High Tg Value on Isola P95/P25 PCB Material

Changes in temperature can impact the reliability and functionality of a PCB material. Increase in temperature makes PCB materials expand. However, PCB materials feature different thermal properties.  Tg, is a thermal property that reveals the glass transition temperature.

Therefore, this property reveals the temperature at which a PCB material transforms to a rubber-like state. When a material operates beyond its Tg value, it changes to a rubbery-like state.

The Tg value of Isola P95/P25 is 260 degrees Celsius. Therefore, this material is resistant to high temperatures. Also, the high Tg value of this material helps to guarantee PCB proper functioning. Also, it provides thermal and mechanical stability. Furthermore, Isola P95/P25 features a low thermal expansion.

This PCB material offers enhanced chemical resistance to moisture and heat. Therefore, it performs better in a thermal environment.

Advantages of Isola P95/P25 PCB material

There are so many benefits PCB manufacturers get from Isola P95/P25 PCB material. Also, these benefits make it a highly preferred material for PCB fabrication.

High thermal reliability

Isola P95/P25 is a reliable material when it comes to thermal performance. Also, the property of this material contributes to its high thermal reliability. For instance, this material has a high Tg value and Td value. Also, this material features a low CTE value. All of these properties are responsible for its thermal reliability.

Industry recognition

This material is approved by some regulatory standards in the PCB industry. Isola P95/P25 PCB material is RoHS compliant. Also, it has a UL file number:E41625. Therefore, this material is highly recommended for PCB fabrication.

Lead-free assembly compatible

Isola P95/P25 PCB material is compatible with lead-free assembly processes. This means that the processing of this material doesn’t involve the use of lead.

Environmentally friendly

Another great benefit of using this material is its environmental friendliness. This material is harmless to the environment. Also, it contains no toxic substances like lead and halogen.

Applications of Isola P95/P25 PCB Material

Aerospace and defense

Isola P95/P25 PCB material is ideal for aerospace and military applications. This is because this material provides all properties that meet the demands of these applications. For example, Isola P95/P25 offers high Tg and Td value. This material is widely used in advanced weaponry systems and flight controls.

Automotive and transportation

In the automotive and transportation industries, thermal reliability is very crucial. The Isola P95/P25 PCB material offers thermal endurance. This material features properties that meet the requirements of engineers in this field. Isola P95/P25 is a cost effective option for PCBs used in these industries.

Frequently Asked Questions

What are the copper foil types used in Isola P95/P25 PCB material?

Isola P95/P25 PCB material uses two different types of copper foil. The reverse treat foil and HTE Grade 3 copper foils are widely used for Isola P95/P25. HTE grade 3 features a semi-matt outer face. Also, this copper foil has an anti-tarnish treatment. This helps to reduce corrosion during storage.

What type of glass fabric is available?

The type of glass fabric used for Isola P95/P25 is E-glass. This glass fabric is widely used for PCB materials. Also, it is the industry-standard. E-glass offers a good balance between performance and cost.


Isola P95/P25 is a reliable material that features great thermal and electrical performance. This article has provided well-detailed information about this PCB material. It explained how this material impact the PCB industry.




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