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Key materials include advanced resin systems like modified epoxy and BT (bismaleimide triazine) resin, which offer excellent heat resistance and laser-drillability for creating precise microvias. A critical innovation is the use of ultra-low profile (VLP) copper foil. Its exceptionally smooth surface minimizes the skin effect, significantly reducing signal attenuation at high frequencies. For flexible Hdi Applications, polyimide (PI) is favored for its durability and ability to withstand repeated bending. Additionally, advanced build-up films, such as ABF (Ajinomoto Build-up Film), are essential for achieving the fine line widths and high-density layering required in modern compact electronics like smartphones and wearables.
Essential HDI PCB Design Rules for Beginners and ExpertsMay/28/2026Designing an HDI PCB is fundamentally different from designing a conventional multilayer board. The rules you learned for standard PCB layout — things like trace widths, via sizes, and clearance requirements — don't always apply when you're working with 50-micron traces, laser-drilled microvias, a...
What is High Density Interconnect (HDI) PCB?May/28/2026If you've been working with modern electronics, you've probably heard the term HDI PCB thrown around a lot. But what exactly does it mean, and why is it becoming so important in today's compact devices? In this guide, we'll break down everything about High Density Interconnect (HDI) PCB — from wha...