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In the relentless pursuit of faster, denser, and more reliable electronics, the foundation of your printed circuit board (PCB) is paramount. Isola IS550H is our Halogen Free laminate solution for high power & voltage applications that require extreme thermal stability.
In this article, we’ll discuss what really characterizes the Isola IS550H 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 high Tg circuit board, so please feel free to contact us.
What is The Isola IS550H PCB Material?
Isola IS550H is formulated to be Halogen free laminate, aligning with environmental regulations and safety concerns. A Tg of 200°C is a critical benchmark. This means IS550H maintains its structural integrity and mechanical properties significantly longer under thermal stress than standard FR-4 materials before transitioning to a rubbery state. This directly translates to enhanced reliability during operation and assembly. Isola IS550H offers a stable dielectric constant (Dk 4.43 @ 10GHz) and a low dissipation factor (Df 0.016 @ 10GHz), ensuring minimal heat generation during signal transmission, which is crucial for applications that require efficient performance in thermally challenging environments.
Isola IS550H was developed in conjunction with a consortium of industry experts for high power & high voltage applications and PEV & HEV automotive electrification. The resulting solution addresses critical application needs for use in a harsh environment where very demanding, long term thermal reliability performance, extreme thermal cycling and very high voltage CAF & electro migration resistance is required.
The laminate is the ideal material for Transportation, Automotive, Aerospace, and Defense applications where failure is not an option. IS550H laminates from Isola represent a high performance solution engineered for applications that demand exceptional thermal stability, long term reliability, and compatibility with modern lead free assembly processes.
Isola IS550H PCB Material Data Sheet
The Features of Isola IS550H PCB Material
High Glass Transition Temperature (Tg 200°C)
The IS550H laminate features a glass transition temperature (Tg 200°C), providing excellent thermal stability and dimensional integrity under elevated temperatures. This makes it ideal for applications exposed to high operating temperatures and multiple thermal cycles.
Dielectric Constant (Dk)
With a dielectric constant (DK 4.43 @10GHz), the Dielectric Constant of the material is a measure of its ability to store electrical energy in a capacitor like manner. IS550H laminates offer a stable Dk, this property measures a material’s ability to store some electrical energy in a given electric field.
Dissipation Factor (Df)
With a dissipation factor (DF 0.016 @10GHz) translates to reduced dielectric loss, Isola IS550H ensures consistent signal integrity, minimizing loss and distortion, even at higher frequencies common in modern electronics.
Halogen-Free
Designed with sustainability in mind, Isola IS550H is halogen free, reducing the emission of corrosive and toxic gases during combustion. This feature supports environmental regulations and enhances safety in enclosed or sensitive environments.
CAF Resistant
IS550H exhibits strong resistance to Conductive Anodic Filamentation (CAF), preventing the formation of unintended conductive paths between conductors. This ensures long term electrical insulation reliability, especially under high humidity and thermal stress conditions.
Lead-Free Assembly Compatible
It is fully RoHS Compliant and Lead free assembly compatible, meeting global environmental regulations. Its flammability rating meets the stringent UL 94V-0 standard, providing critical fire safety.
Exceptional Thermal Endurance
The material is capable of withstanding 6x reflow cycles at 260°C and 6x solder float tests at 288°C, demonstrating its high thermal reliability and suitability for complex, multi-step assembly processes common in high reliability manufacturing.
Low Moisture Absorption
With low moisture absorption, IS550H minimizes the risk of delamination, popcorn effect, and electrical performance degradation in humid environments, further enhancing product durability and field reliability.
The Applications of Isola IS550H Laminate System
The demanding properties of IS550H make it ideally suited for sectors requiring unwavering reliability under stress:
Transportation and Automotive
In the automotive sector, IS550H is used in advanced driver assistance systems (ADAS), engine control units (ECUs), infotainment systems, and powertrain electronics. Its ability to withstand high temperatures and mechanical stress makes it ideal for under the hood and safety critical applications.
Aerospace & Defense
In aerospace and defense systems, where failure is not an option, it is trusted for avionics, radar systems, satellite communications, and other mission critical electronics. Its exceptional thermal stability, low outgassing, and high reliability make it ideal for extreme conditions in space and military platforms.
Manufacturing Advantages of Isola IS550H High Tg Laminates
Beyond its raw performance specs, Isola IS550H delivers significant benefits on the factory floor and throughout the product lifecycle:
High Decomposition Temperature (Td)
Isola IS550H features a high decomposition temperature (Td), significantly above its Tg of 200°C, which ensures the material maintains its chemical structure and mechanical properties even during prolonged exposure to high heat, preventing premature degradation during processing or operation.
Controlled Coefficient of Thermal Expansion (CTE)
Before Tg, the Isola IS550H laminate has a CTE of 38 ppm/°C. Furthermore, for post Tg, it has a CTE of 210 ppm/°C. Also, during total expansion that falls between 50 – 260 degrees Celsius, it has a typical value of 2.2%. At the X and Y axis, the coefficient of thermal expansion stands at 13 to 17 ppm/°C before Tg. This contributes to excellent through hole reliability and long term structural integrity in multi-layer PCBs.
Cost-Effective and Readily Available
While delivering performance on par with exotic materials, Isola IS550H offers a cost effective solution for high reliability applications. Its ready availability from Isola and global distributors supports both prototyping and high volume production, making it a practical and scalable choice.
Ultimately, Isola IS550H high Tg laminates represent the pinnacle of thermal performance in PCB materials. For engineers designing electronics destined for the engine bay, the cockpit, or the harsh frontier of aerospace and defense, material choice is fundamental. By choosing Isola IS550H laminate, manufacturers can achieve superior performance, enhanced safety, and extended product lifetimes.
If you have any further questions, please feel free to leave a comment below or contact QFPCB by email ([email protected]).
