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The increasing power and complexity of electronics systems are intensifying the demands on printed circuit boards and IC substrates. Applications that include AI infrastructure, high-performance computing, electric vehicles, and next-generation consumer electronics require higher interconnect density and uncompromising reliability. At the same time, PCB fabricators are navigating a manufacturing environment shaped by supply chain volatility, sustainability mandates, and ongoing cost constraints.
These forces prompt a broader reassessment of fabrication processes, particularly primary metallization, a critical step that directly influences reliability, yield, environmental impact, and operational resilience.
For decades, electroless copper plating has been the industry standard for primary metallization. However, as high-density interconnect (HDI) complexity increases and sustainability pressures grow, more fabricators recognize direct metallization not just as an alternative process, but as a strategic enabler for future‑ready PCB manufacturing.
Primary Metallization: The Foundation of PCB and IC Substrate Fabrication
All multilayer PCBs and IC substrates rely on inner layer connections, typically created by buried through-holes, blind vias, or stacked microvias, to transmit electrical signals between layers. These vias are formed through mechanical or laser drilling. Primary metallization, commonly called “making holes conductive,” prepares these non-conductive hole walls for electroplating.
To continue reading this article, which originally appeared in the May 2026 I-Connet007 Magazine, click here.
