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Isola P95/P25

Jarnistech > Isola PCB > Isola P95/P25
Isola P95/P25 PCB Board

As a leading circuit board manufacturer, choosing the right materials is paramount to delivering high-quality, reliable, and cutting-edge PCBs. Isola P95/P25 PCB materials have emerged as a game-changer in the industry, offering an array of advantages that enable us to meet and exceed customer expectations.

With their exceptional properties, such as high glass transition temperature (Tg), low dielectric loss, and outstanding thermal stability, Isola P95/P25 laminates empower us to create PCBs that excel in demanding applications. This article delves into the remarkable features and benefits of Isola P95/P25 PCB materials, showcasing how they enable us to unlock excellence in our manufacturing processes.

Definition of Isola P95/P25 PCB Materials?

Isola P95/P25 is a specialized core material (P95) combined with a polyimide-based prepreg (P25). It is specifically engineered to meet the demanding requirements of high-temperature printed circuit board (PCB) applications. The key feature of Isola P95/P25 PCB material lies in its utilization of a polyimide resin system, which possesses an HB flammability rating. This attribute makes it exceptionally suitable for industrial or commercial applications that necessitate superior performance.

Moreover, this PCB laminate employs a unique blend of thermoplastic and polyimide resins, eliminating the need for Methylenedianiline during the curing process. Consequently, it results in a polymer with a high glass transition temperature (Tg) and avoids the brittleness commonly associated with conventional thermoset polyimides. Isola P95/P25 PCB material also exhibits excellent initial peel strength, surpassing that of regular thermoset polyimides.

Notably, Isola P95/P25 PCB material boasts a high Tg value and thermal decomposition temperature (Td). With a Tg value of 260 degrees Celsius, it delivers exceptional thermal performance, ensuring reliable operation even in demanding environments. Additionally, this material exhibits a low dielectric constant and dissipation factor, contributing to efficient signal transmission and reduced signal loss.

Overall, Isola P95/P25 PCB material offers a compelling combination of high-temperature resistance, superior performance, and excellent thermal and electrical properties. It is an ideal choice for advanced PCB designs in industries where reliability and efficiency are paramount.

Feature of Isola P95/P25 PCB Materials

Industry Recognition:

●UL File Number: E41625
●RoHS Compliant

Performance Attributes:

●Lead-free assembly compatible
●6x 260°C reflow capable

Processing Advantages:

●Via filling capability
●Multiple reflow capable
●Multiple lamination cycles

Isola P95/P25 PCB materials have gained industry recognition and meet the standards set by UL (Underwriters Laboratories). They are compliant with RoHS regulations, ensuring environmentally friendly manufacturing processes.

In terms of performance, these materials are compatible with lead-free assembly, aligning with the industry’s move towards environmentally conscious practices. They are capable of withstanding up to 6 cycles of reflow at temperatures as high as 260°C, demonstrating their robustness and reliability in demanding applications.

Isola P95/P25 PCB materials also offer processing advantages. They have via filling capability, allowing for the creation of reliable and efficient interconnections between layers. This feature enhances signal integrity and reduces the risk of failures. The materials can undergo multiple reflow cycles, enabling flexibility in the assembly process and facilitating efficient production. Additionally, they support multiple lamination cycles, providing flexibility for complex PCB designs and allowing for modifications or repairs during the manufacturing process.

Properties of the Isola P95/P25 PCB Material

1. High Glass Transition Temperature (Tg):

●Tg value of 260 degrees Celsius
●Withstands high temperatures
●Offers exceptional thermal performance
●Enhanced chemical and mechanical resistance to heat

2. Low Dissipation Factor (Df):

●Df of 0.021 at 10 GHz
●Df varies across the frequency range
●Example: Df of 0.0135 at 100 GHz

3. Very High Decomposition Temperature (Td):

●Td value of 416 degrees Celsius
●Extremely high Td value indicates excellent material performance

4. Low Coefficient of Thermal Expansion (CTE):

●Low CTE minimizes material expansion with temperature variations
●Can withstand high temperatures in operational environments

5. Peel Strength:

●Peel strength after thermal stress: 1.25 (7.0) N/mm (Ib/inch)
●Peel strength after process solutions: 1.14 (6.5) N/mm (Ib/inch)

6. Low Moisture Absorption:

●Moisture absorption of 0.5%
●Rarely absorbs water and can withstand a humid environment

7. Low Dielectric Constant:

●Dielectric constant of 3.73 at 5 GHz and 10 GHz
●Low dielectric constant indicates a good insulator system

Isola P95/P25 PCB material exhibits a high glass transition temperature (Tg), allowing it to withstand high temperatures and provide excellent thermal performance. It has a low dissipation factor (Df) at various frequencies, indicating efficient signal transmission. The material also has a very high decomposition temperature (Td), ensuring its stability and reliability under extreme conditions.

With a low coefficient of thermal expansion (CTE), Isola P95/P25 PCB material minimizes expansion and contraction when exposed to temperature changes, making it suitable for high-temperature operational environments. It offers strong peel strength even after thermal stress and process solutions.

The material has low moisture absorption, enabling it to resist water absorption and perform well in humid environments. Additionally, it has a low dielectric constant, indicating good insulation properties for effective signal isolation.

Overall, Isola P95/P25 PCB material possesses a combination of desirable properties that make it suitable for high-performance and reliable PCB designs.

Disadvantages of Isola P95/P25

While Isola P95/P25 PCB laminates offer several advantageous properties, it’s important to consider potential disadvantages as well. Here are some potential drawbacks of Isola P95/P25 PCB laminates:

1. Cost: High-performance PCB materials often come at a higher cost compared to standard materials. Isola P95/P25 PCB laminates may be more expensive, which can impact the overall cost of the PCB manufacturing process.

2. Availability: Isola P95/P25 PCB laminates may not be as widely available as some other standard PCB materials. This limited availability could result in longer lead times or difficulties in sourcing the material, especially for smaller-scale or specialized projects.

3. Processing Requirements: Some high-performance PCB materials, including Isola P95/P25 laminates, may have specific processing requirements. These requirements could include specialized equipment, techniques, or expertise, which may add complexity to the manufacturing process and potentially increase costs.

4. Design Limitations: High-performance PCB materials may have certain design limitations or constraints. For example, they may have specific requirements for minimum trace width, spacing, or via sizes. Designers need to be aware of these limitations and ensure that their designs comply with the material’s specifications.

5. Compatibility: Isola P95/P25 PCB laminates may not be compatible with all manufacturing processes or technologies. Certain fabrication techniques or assembly methods may not be suitable for these laminates, requiring alternative approaches or adjustments to the manufacturing process.

6. Environmental Considerations: High-performance PCB materials, including Isola P95/P25 laminates, may have specific environmental considerations. It’s important to understand the material’s properties and potential impact on the environment, including issues related to disposal, recycling, or compliance with regulations.

It’s crucial to carefully evaluate the specific requirements and constraints of a project before selecting Isola P95/P25 PCB laminates or any other high-performance material. Consider factors such as cost, availability, processing requirements, design limitations, compatibility, and environmental considerations to make an informed decision that aligns with the project’s needs and constraints.

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

The high glass transition temperature (Tg) of Isola P95/P25 PCB material has a significant impact on its performance and suitability for various applications. Here are some key impacts of the high Tg value:

1.Thermal Stability:

The high Tg value of Isola P95/P25 PCB material indicates its ability to withstand elevated temperatures without undergoing significant dimensional changes or loss of mechanical properties. This thermal stability is crucial in applications where the PCB is exposed to high operating temperatures or experiences thermal cycling.

2.Improved Reliability:

The high Tg value enhances the reliability of Isola P95/P25 PCB material. It helps prevent issues such as warping, delamination, and solder joint failures that can occur due to thermal stress. By maintaining its structural integrity at high temperatures, the material ensures the long-term reliability of the PCB assembly.

3.Enhanced Mechanical Strength:

Isola P95/P25 PCB material with a high Tg value exhibits improved mechanical strength and rigidity. It provides better resistance to bending, flexing, and vibration, making it suitable for applications that require robust PCBs, such as aerospace, automotive, and industrial electronics.

4.Compatibility with Lead-Free Assembly:

The transition to lead-free soldering processes, which require higher reflow temperatures, is facilitated by the high Tg value of Isola P95/P25 PCB material. It ensures that the material can withstand the elevated temperatures necessary for lead-free soldering without compromising its integrity.

5.Design Flexibility:

The high Tg value allows for more design flexibility in terms of the operating temperature range of the PCB. It enables the use of components and circuits that generate more heat or are exposed to higher temperatures, expanding the possibilities for PCB layout and component placement.

6.Resistance to Chemicals and Moisture:

The high Tg value also contributes to the material’s resistance to chemical solvents and moisture. It helps prevent the degradation of the PCB material when exposed to harsh environments or chemical substances, ensuring the longevity and reliability of the circuitry.

Availability of Isola P95/P25 PCB Substrates

Standard Material Offering: Laminate

●Thickness: 2 to 125 mil (0.05 to 3.2 mm)
●Available in full-size sheet or panel form

Copper Foil Type:

●HTE Grade 3
●RTF (Reverse Treat Foil)

Copper Weight:

●Available in copper weights ranging from ½ to 3 oz (18 to 105 µm)
●Heavier copper options are available
●Thinner copper foil options are also available

Standard Material Offering: Prepreg

●Available in roll or panel form
●Prepreg panels can be tooled for specific requirements

Glass Fabric Availability:


Isola P95/P25 PCB substrates are available in a range of thicknesses, from 2 to 125 mil (0.05 to 3.2 mm), providing flexibility to meet different design requirements. They can be obtained in either full-size sheet or panel form, allowing for efficient manufacturing and assembly processes.

The copper foil used in Isola P95/P25 PCB substrates is of HTE Grade 3 or RTF (Reverse Treat Foil) type, ensuring high-quality copper layers for reliable electrical connections.

Various copper weights are available, ranging from ½ to 3 oz (18 to 105 µm). This range accommodates different current-carrying capabilities and design requirements. Additionally, Isola offers options for heavier copper for specific applications that demand higher current capacity, as well as thinner copper foil for designs with space constraints.

Isola P95/P25 PCB substrates also include prepreg materials, which are available in roll or panel form. This provides flexibility in manufacturing processes and allows for efficient handling and utilization of the prepreg materials. Prepreg panels can be tooled to meet specific design needs, further enhancing customization options.

The glass fabric used in Isola P95/P25 PCB substrates is E-glass, a commonly used material known for its excellent electrical insulation properties and mechanical strength.

All in all, Isola P95/P25 PCB substrates offer a wide range of options in terms of laminate thickness, copper foil type and weight, prepreg form, and glass fabric, providing designers with the flexibility and versatility needed to meet their specific PCB requirements.


In the competitive landscape of circuit board manufacturing, staying ahead requires embracing innovation and leveraging the best materials available. Isola P95/P25 PCB materials have proven to be a game-changer for us, enabling us to deliver PCBs of unparalleled quality and performance. With their high Tg value, low dielectric loss, and exceptional thermal stability, Isola P95/P25 laminates have become our go-to choice for demanding applications across industries.

By harnessing the advantages of Isola P95/P25 PCB materials, we can confidently offer our customers reliable, high-performance PCBs that meet the most stringent requirements. As we continue to push the boundaries of technology, Isola P95/P25 PCB materials remain our trusted ally, unlocking excellence in every circuit board we manufacture.

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