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Carmichael Gugliotti of MacDermid Alpha discusses the innovative realm of direct metallization technology, its numerous applications, and significant advantages over traditional processes. Carmichael offers an in-depth look at how direct metallization, through developments such as Blackhole® and Shadow®, is revolutionizing PCB manufacturing by enhancing efficiency, sustainability, and cost-effectiveness. From its origins in the 1980s to its application in cutting-edge, high-density interconnects and its pivotal role in sustainability, this discussion sheds light on how direct metallization shapes the future of PCB manufacturing across various industries, including automotive, consumer electronics, and beyond.
Carmichael, please explain direct metallization technology generally, and why it is a better solution for some applications.
Carmichael Gugliotti: Direct metallization (DM) is a primary metallization process used to make PCB hole and via walls conductive prior to electrolytic copper plating. In DM processing, a coating of carbon or graphite is deposited on the surface and within the features of a bare PC board, creating a conductive pathway across the laminate areas. The coating is then etched from the exposed copper areas, leaving the conductive material on the laminate surfaces.
Electroless copper has been the primary metallization process for fabricators for a long time, even though early versions of the direct metallization process were developed in the 1980s. DM was originally deployed for use with double-sided, low-layer count applications. Through years of innovation, the process has been optimized for higher layer count, mSAP, and HDI designs.
Direct metallization is used in a wide range of applications, various end-use markets, and with common dielectric materials. It is used in rigid, rigid-flex, and flexible designs, though it is most widely deployed in plating flexible circuits. It is widely utilized in consumer electronics, such as hand-held devices, and in automotive, mil/aero, computing, industrial, and wireless applications, to name a few.
To read this entire conversation, which appeared in the October 2024 issue of PCB007 Magazine, click here.
