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Isola Commercializes IS550H: Halogen-Free, CAF Resistant, High Thermal Reliability Material
February 22, 2021 | Isola GroupEstimated reading time: 1 minute

Isola Group, a leading global manufacturer of copper-clad laminates and dielectric prepregs for use in the manufacture of PCB, is launching our newest halogen-free material called IS550H. IS550H is an environmentally friendly, extreme thermal reliability, CAF resistant copper clad laminate and prepreg material for applications requiring high voltage, high power, and long-term thermal stability.
With the rise of automotive electrification, electronics system designers face significant challenges to achieve long-term, high reliability. The need for high voltage operation and fast charging coupled with reduced pitch and conductor spacing (miniaturization) requires the use of a material to enable designs for these extreme conditions. PCB’s will require a base material that has the capability to withstand electrochemical migration while operating in harsh environments at high voltage loads. By using unique resin technology, Isola has developed IS550H to be capable of operating at a continuous operating temperature up to 175°C and has the ability to meet very demanding thermal cycling requirements (-40°C to 175°C for 2000 cycles). IS550H has demonstrated to have CAF performance at 1500V for 1000 hours for tight pitch, PTH to PTH and z-axis structures. IS550H is also a significant improvement over FR-4 type materials with a thermal conductivity of 0.70 W/mK that enables embedded heat sink applications. While it is not FR-4 material, IS550H’s processibility is easy like common FR-4 materials.
IS550H is available with core thickness ranging from 0.0020 inch (0.05 mm) to 0.063 inch (1.5 mm) and a wide range of prepreg resin contents for most applications including heavy copper designs.
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Trouble in Your Tank: Minimizing Small-via Defects for High-reliability PCBs
08/27/2025 | Michael Carano -- Column: Trouble in Your TankTo quote the comedian Stephen Wright, “If at first you don’t succeed, then skydiving is not for you.” That can be the battle cry when you find that only small-diameter vias are exhibiting voids. Why are small holes more prone to voids than larger vias when processed through electroless copper? There are several reasons.
The Government Circuit: Navigating New Trade Headwinds and New Partnerships
08/25/2025 | Chris Mitchell -- Column: The Government CircuitAs global trade winds continue to howl, the electronics manufacturing industry finds itself at a critical juncture. After months of warnings, the U.S. Government has implemented a broad array of tariff increases, with fresh duties hitting copper-based products, semiconductors, and imports from many nations. On the positive side, tentative trade agreements with Europe, China, Japan, and other nations are providing at least some clarity and counterbalance.
How Good Design Enables Sustainable PCBs
08/21/2025 | Gerry Partida, Summit InterconnectSustainability has become a key focus for PCB companies seeking to reduce waste, conserve energy, and optimize resources. While many discussions on sustainability center around materials or energy-efficient processes, PCB design is an often overlooked factor that lies at the heart of manufacturing. Good design practices, especially those based on established IPC standards, play a central role in enabling sustainable PCB production. By ensuring designs are manufacturable and reliable, engineers can significantly reduce the environmental impact of their products.
50% Copper Tariffs, 100% Chip Uncertainty, and a Truce
08/19/2025 | Andy Shaughnessy, I-Connect007If you’re like me, tariffs were not on your radar screen until a few months ago, but now political rhetoric has turned to presidential action. Tariffs are front-page news with major developments coming directly from the Oval Office. These are not typical times. President Donald Trump campaigned on tariff reform, and he’s now busy revamping America’s tariff policy.
Global PCB Connections: Understanding the General Fabrication Process—A Designer’s Hidden Advantage
08/14/2025 | Markus Voeltz -- Column: Global PCB ConnectionsDesigners don’t need to become fabricators, but understanding the basics of PCB fabrication can save you time, money, and frustration. The more you understand what’s happening on the shop floor, the better you’ll be able to prevent downstream issues. As you move into more advanced designs like HDI, flex circuits, stacked vias, and embedded components, this foundational knowledge becomes even more critical. Remember: the fabricator is your partner.