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Why Isola P96/P26 PCB Material is the Best Solution for High Performance Applications

Isola PCB materials are one of the most reliable products in the PCB industry. These materials are specially designed with quality in mind. Also, these materials are widely used in a variety of applications. Isola P96/P26 PCB material is one of such materials. In this article, we will discuss Isola P96/P26 PCB material and what it offers. Therefore, it is advisable to read this article thoroughly to learn more.

What is Isola P96/P26 PCB Material?

Isola P96/P26 is a PCB material that comprises core material (P96) and polyimide-based prepreg (P26). This material is useful for high temperature printed circuit applications. Also, this material features a flame resistant polyimide resin system.

Isola P96/P26 comprises thermoplastic and polyimide blend systems. This material is well cured without methylenedianiline (MDA). Therefore, this produces a polymer with high glass transition temperature. Isola P96/P26 features a polyimide resin system ideal for flame resistant products.

Properties of Isola P96/P26 PCB Material

Isola P96/P26 features great thermal, mechanical, and electrical performances.

Stable and low dielectric constant

The dielectric constant of Isola P96/P26 is 3.73 at 5 GHz and 10 GHz. Also, this material features signal integrity and reduces signal loss when used in applications.

High glass transition temperature

The glass transition temperature of this material is 260 degrees Celsius. Also, this high Tg value influences the performance of this material in different temperatures. Therefore, it features high thermal reliability.

Low dissipation factor

The dissipation factor of Isola P96/P26 is 0.021 and 0.0198 at 10 GHz and 5 GHz respectively. Also, materials with low dissipation factor are good insulators. Therefore, Isola P96/P26 PCB material serves as a good insulator. It doesn’t absorb or discharge heat easily.

High decomposition temperature

The decomposition temperature of P96/P26 PCB material is 396 degrees Celsius. This Td value is very high. Also, this material can rarely decompose chemically at a high temperature.

Low CTE value

The coefficient of thermal expansion is very low. Also, the CTE at z-axis is 55 ppm/°C before Tg. The CTE at x and y-axis at 13/14 ppm/°C before Tg. Therefore, this material can withstand high temperatures without expanding in size.

Low water absorption

This property measures the amount of moisture a material will absorb. Isola P96/P26 features a low water absorption rate. Also, this value is 0.5%. Therefore, this material can function well in a humid operational environment.

Peel strength

The peel strength of Isola P96/P26 is 1.25 (7.0) N/mm (Ib/inch) after thermal stress. After process solutions, the peel strength is 1.14 (6.5) N/mm (Ib/inch). Also, this material maintains good bond strength at a very high temperature.

Handling and Storage Guidelines for Isola P96/P26 PCB Material

For effective functionality, it is important to handle and store Isola P96/P26 PCB material properly. Manufacturers create prepreg bonding sheets according to specifications. Handling and storage affect the performance of the prepreg.

The environment the prepreg is being stored can affect some parameters. The prepreg is a glass fabric already impregnated with volatile and polymerized resin. This resin is kind of brittle. There are several lamination issues that result from loss of resin from the fabric. Therefore, this is as a result of improper handling.  

Below are handling and storage guidelines for prepregs

  • When handling all prepreg, use clean gloves.
  • Also, utilize precision equipment when paneling or cutting prepreg.
  • Be very careful when handling high resin prepreg.
  • Move all prepreg by utilizing a First-In-First Out inventory system management
  • If prepreg needs extended storage, reserve separate facilities with proper environmental control.
  • Long-term vacuum storage isn’t ideal.
  • If storage temperature is below room temperature, keep the prepreg in a package during stabilization. Therefore this will prevent moisture condensation.
  • Also, use prepreg immediately you open the original packaging
  • Reseal the remaining prepreg  in the original packaging with fresh desiccant.
  • Store prepreg in a non-catalytic environment. Also, there should be absence of intense UV light and high radiation levels.
  • Reduce high resin use in prepreg whenever. Therefore, this prevents excessive layer movement.
  • Storage at or less than 5 degrees Celsius will not extend the shelf life of the product to 6 months.

The Inner Layer Preparation of Isola P96/P26 PCB Material

Isola P96/P26 is fully cured and available for processing. Most fabricators believe that stress relief bake cycles don’t minimize movement of P96. Therefore, unbaked laminate movement should be characterized. Also, using the appropriate artwork compensation factors are crucial.

The net dimensional movement of this material after the lamination process shrinks. The relaxation of stresses induced when pressing the laminate is responsible for the shrinkage.

Condition the prepreg before lay-up if moisture absorption has occurred during storage. Expose the prepreg to desiccation of vacuum for 24 hours before lay-up. This will enhance the consistency of flow. Also, it will help to generate superior properties and higher Tg.

Also, for a standard lamination, it is advisable to use polytreat copper foil or advanced copper bond. The thickness of the multilayer circuits will determine the cure temperature of P96/P26 multilayer boards.

Benefits of Isola P96/P26 PCB Material

Environmentally friendly

This material is very safe for the environment as it contains no halogen constituents. Also, it features no harmful substances. PCB fabrication requires the use of non-toxic substances. Therefore, Isola P96/P26 PCB material is mostly preferred among PCB manufacturers.

Industry recognition

Isola P96/P26 is well recognized by some industry standards. Also, this material is RoHS compliant. It features a UL file number E41625. Furthermore, it complies with IPC-4101C/40/41/42 standards.

Great processing

This material features multiple reflow capability. Also, it ensures good flow and fill. Therefore, this makes it a better alternative to other polyimide materials.


Isola P96/P26 is a cost-effective option for PCB fabrication. Also, this material offers a balance between cost and performances. It offers great performance for its price.

High thermal reliability

One of the great advantages of Isola P96/P26 PCB material is high thermal reliability. This material is very reliable in high temperature applications. Also, it functions properly in applications exposed to high temperature ranges.


Isola P96/P26 is a reliable material that features great properties. This article has provided well-detailed information about Isola P96/P26 PCB material.




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