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Beyond the Rulebook
What happens when the rule book is no longer useful, or worse, was never written in the first place? In today’s fast-moving electronics landscape, we’re increasingly asked to design and build what has no precedent, no proven path, and no tidy checklist to follow. This is where “Design for Invention” begins.
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From the growing role of AI in design tools to the challenge of managing cumulative tolerances, these articles in this issue examine the technical details, design choices, and manufacturing considerations that determine whether a board works as intended.
Looking Forward to APEX EXPO 2026
I-Connect007 Magazine previews APEX EXPO 2026, covering everything from the show floor to the technical conference. For PCB designers, we move past the dreaded auto-router and spotlight AI design tools that actually matter.
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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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I-Connect007 Releases The Printed Circuit Designer’s Guide to… Direct Metallization: A Guide to Complex PCB Fabrication
05/13/2026 | I-Connect007As PCB complexity continues to accelerate, fabricators and OEMs are reevaluating long-standing manufacturing processes to meet the demands of AI, HDI, advanced packaging, and next-generation electronics. To address these evolving challenges, I-Connect007 is proud to announce the release of The Printed Circuit Designer’s Guide to… Direct Metallization: A Guide to Complex PCB Fabrication, authored by MacDermid Alpha Solution’s Carmichael Gugliotti.
Driving Innovation: Selecting the Right Laser Source
04/28/2026 | Simon Khesin -- Column: Driving InnovationWhen I first joined Schmoll Maschinen, I brought experience from almost every PCB process, except for laser. As I immersed myself in laser processing, I realized why it can seem so daunting to a newcomer. The complexity arises from three intersecting factors: A vast variety of laser sources: CO2, UV-nano, green-pico, UV-pico, IR-pico, and others; a diverse range of applications: Drilling, cutting, ablation, and more; and an extensive list of materials: These have vastly different absorption rates. Choosing the right machine or laser source is rarely trivial. Even for experienced engineers, answering "Which source is best?" requires examining the business's specific goals.
Institute of Circuit Technology Spring Seminar 2026: A Bright Future in Europe
04/23/2026 | Pete Starkey, I-Connect007Through the leafy lanes and spring flowers of Warwickshire and back to Meridan, the traditional centre of England, and now officially part of the Metropolitan Borough of Solihull in the county of the West Midlands, I attended the Annual General Meeting and Spring Seminar of the Institute of Circuit Technology (ICT) on April 14. Out of the AGM came notable changes in leadership at the top of the Institute: the retirement of Mat Beadel as chair and Emma Hudson as technical director. Effective May 1, Steve Driver is the new chair, and Alun Morgan is the new technical director.
ACCM Unveils Negative and Near-zero CTE Materials for Large-Format AI Chips
04/21/2026 | Advanced Chip and Circuit MaterialsAdvanced Chip and Circuit Materials, Inc. (ACCM) has launched two new materials: Celeritas HM50, with a negative coefficient of thermal expansion (CTE) of -8 ppm/°C to offset the positive CTE and expansion of copper with temperature on circuit boards, and Celeritas HM001, with near-zero CTE and the low-loss performance needed for high-speed signal layers to 224 Gb/s and faster in artificial intelligence (AI) circuits.
Fresh PCB Concepts: Designing PCBs for Harsh Environments—Reliability Is Engineered Upstream
04/23/2026 | Team NCAB -- Column: Fresh PCB ConceptsWhen engineers hear the phrase “harsh environment,” they usually think of the extreme temperature swings, vibration and shock, pressure changes, or radiation in aerospace. However, aerospace is not the only harsh environment where electronic assemblies must survive. Automotive power electronics, downhole oil and gas tools, marine controls, rail systems, defense platforms, and industrial automation equipment all expose PCBs to environments that are equally unforgiving. The stress mechanisms may differ, but the physics does not.