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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.
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Ventec High Performance IMS Dielectric Material VT-4B5H Receives UL-Authorization
April 29, 2020 | Ventec International Group Co., Ltd.Estimated reading time: 2 minutes
Ventec International Group Co., Ltd., is pleased to announce that UL’s evaluation of Ventec’s high-performance ceramic-filled, non-reinforced IMS dielectric material has received authorization to apply the UL mark and has thus been recognized for achieving 155°C maximum operating temperature (MOT) for electric and mechanical RTI (Relative Temperature Index).
UL's investigation of Ventec's VT-4B5H metal base laminate has been completed and was determined to comply with the applicable requirements including 155oC MOT (maximum operating temperature) for electric and mechanical RTI (Relative Temperature Index). With thermal conductivity of 4.2 W/m*K and glass transition temperature (Tg) of 180°C, the versatile IMS material is the perfect choice for use in extreme high temperature applications. These include DC/DC power modules, IGBT applications, motor controllers, high lumen output LED devices, battery charging, OBC chargers for EV vehicles and several other automotive “underhood” applications. VT-4B5H is also highly recommended for chip on board (COB) or direct die in both power and LED applications.
VT-4B5H is available in a wide range of dielectric-, copper foil- and base plate thicknesses and types as well as in numerous panel size options. This versatility is ideal for both single layer and multiple layer IMS designs.
Chris Hanson, Global Head IMS Technology, commented: "Achieving UL authorization for VT-4B5H’s industry-leading 155°C MOT performance is fantastic news. As a complement to our full VT-4B series of superior thermal dissipation materials, our customers have access to an IMS material that meets virtually any high thermal performance requirements."
Ventec International is a world leader in the production of polyimide and high reliability epoxy laminates and prepregs and specialist provider of thermal management and IMS solutions. Further information about Ventec’s solutions and the company’s wide variety of products is available at www.venteclaminates.com and/or by downloading the Ventec APP.
About Ventec International Group
Ventec International is a premier supplier to the Global PCB industry. With volume manufacturing facilities in Taiwan and China and distribution locations and manufacturing sites in both the US and Europe, Ventec specializes in advanced copper-clad glass-reinforced and metal-backed substrates. Ventec materials, which include high-quality enhanced FR-4, high-speed/low-loss- and high-performance IMS material technology and an advanced range of thermal management solutions, are manufactured by Ventec using strict quality-controlled processes that are certified to AS9100 Revision D, IATF 16949:2016 and ISO 9001:2015, and are backed by a fully controlled and managed global supply chain, sales- and technical support-network.
For more information, visit www.venteclaminates.com.
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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.
Advanced Packaging for AI: Reliability Starts at the Cu/Cu/Cu Microvia Junction
04/20/2026 | Kuldip Johal, MKS' AtotechThe rapid growth of AI computing, from training clusters to inference at scale, is reshaping demand across the entire electronics supply chain. Advances in technology requirements, such as higher bandwidth, lower latency, and greater compute density, are driving the development of advanced packaging technologies and transforming the PCB industry across design, manufacturing, testing, and even architecture.