Brand

The Printed Circuit Designer's Guide to... ™
Direct Metallization: A Guide to Complex PCB Fabrication

by: Carmichael Gugliotti, MacDermid Alpha Electronics Solutions

This book examines the evolution and application of direct metallization in PCB fabrication, highlighting its emergence as a reliable alternative to traditional electroless copper processes. Drawing on decades of advancements in chemistry and equipment, the author explores how modern PCB complexity—driven by multilayer designs and high-performance demands—requires greater precision in hole formation and metallization. The book takes a comprehensive approach, covering drilling, desmear, process optimization, and integration with electrolytic copper plating. It also addresses sustainability advantages, including reduced resource consumption and hazardous materials, while evaluating reliability and performance considerations critical to both fabricators and OEMs.



ISBN: 978-1-959894--26-1

Carmichael Gugliotti is a seasoned technical leader in the advanced materials and electronics manufacturing industries. In his current role, he oversees the development, launch, and commercial implementation of next-generation primary metallization chemistries and processes that enable high-performance printed circuit boards.

Over the course of his 12-year career at MacDermid Alpha Electronics Solutions, Gugliotti has been a key driver of innovations such as Shadow® Plus, a cutting-edge graphite-based direct metallization technology designed to replace traditional electroless copper for making holes conductive. Before serving as a Line of Business Director, he worked as a product manager, applications manager, applications specialist, and chemist focused on acid copper plating solutions. He has authored multiple papers on metallization and holds a patent for through-hole filling.

Beyond product leadership, Gugliotti’s role requires deep expertise in plating chemistry, process engineering, and application support. He connects R&D, manufacturing, sales, and customer support to ensure that innovative metallization solutions meet rigorous performance, yield, and cost standards in practical production settings.

With an MBA from Quinnipiac University and a Bachelor of Chemistry from the University of Connecticut, the author brings a strong focus on sustainability, process efficiency, and customer-centric innovation to his work and is passionate about advancing electronics manufacturing toward greener, more reliable, and higher-density solutions.

MacDermid Alpha Electronics Solutions, a business unit of Element Solutions Inc, is a global leader in high-performance specialty chemicals, materials, and process technologies for every stage of the electronics manufacturing process. With expertise spanning circuitry formation, wafer-level packaging, circuit board assembly, semiconductor assembly, and film and smart surfaces, MacDermid Alpha delivers advanced, sustainable, and integrated solutions that drive innovation and reliability across the electronics supply chain. Operating worldwide and backed by more than a century of innovation, the organization supports a broad range of industries including automotive, consumer electronics, data infrastructure, high-performance computing, and telecommunications enabling next-generation electronics.

For more information, visit macdermidalpha.com

This book has been technically reviewed by the following experts:

Jerry Magera Senior Principal Product Development Engineer, RTX

Michael (Mike) Carano Consultant, Industry Intelligence and Technology Solutions, Global Electronics Association

Venkat Raja President & Founder, Advint, Inc.

Chapter Summaries

  • Chapter 1

    The History of Metallization 

    This chapter traces the evolution of metallization in PCB fabrication, from early electroless copper processes to modern direct metallization technologies.

  • Chapter 2

    Drilling and Desmear

    The author examines the critical role of drilling and desmear in preparing PCB substrates for metallization, detailing both mechanical and laser drilling methods and their associated challenges.

  • Chapter 3

    Making Holes Conductive: Electroless Copper

    This chapter details the electroless copper process for primary metallization, explaining its chemistry, steps, and reliability as the dominant method for making PCB holes conductive.

  • Chapter 4

    Making Holes Conductive: Direct Metallization

    Direct metallization uses carbon or graphite coatings to enable copper plating with fewer steps, offering improved efficiency, material compatibility, and sustainability over electroless copper.

  • Chapter 5

    Sustainability

    This chapter highlights how direct metallization improves PCB sustainability by reducing water, energy, chemicals, waste, and emissions compared to electroless copper, supporting cost savings and environmental goals.

  • Chapter 6

    Direct Metallization and Periodic Pulse Reverse Plating in Through-Holes

    Here, the author demonstrates that pulse plating improves throwing power, reduces copper usage and costs, increases throughput, and maintains equivalent reliability performance.

  • Chapter 7

    Direct Metallization and Microvias

    This chapter explains microvia plating, highlighting via-fill chemistry, design challenges, and reliability, showing full via-fill with direct metallization improves performance and reduces defects in high-density PCBs. 

  • Chapter 8

    Direct Metallization Reliability

    PCB reliability testing includes assembly and life testing to simulate manufacturing and use conditions; results show direct metallization meets or exceeds electroless copper reliability across multiple tests.

  • Chapter 9

    A PCB Fabricator's Guide to Direct Metallization

    PCB demands are evolving with advanced technologies like AI and HPC, requiring improved metallization; direct metallization enables higher reliability, finer features, and more sustainable, efficient manufacturing processes.

  • Chapter 10

    An OEM's Guide to Direct Metallization

    This chapter guides OEMs on adopting direct metallization, emphasizing sustainability, reliability, and supply chain influence, highlighting their critical role in driving industry adoption of advanced PCB manufacturing processes.

What Our Readers Are Saying



Contact the Author

For technical support click here

Jerry Magera

With more than four decades of experience, Jerry Magera is a recognized authority in electronic materials, processes, and high-density interconnect (HDI) technology. A graduate of Syracuse University with a BS in chemical engineering (1984), he has built a distinguished career spanning some of the electronics industry’s most influential organizations. Currently with RTX, Jerry previously spent over 30 years at Motorola and Motorola Solutions, along with six years at Hadco and Sanmina-SCI and four years at Allied Chemical and Allied-Signal.

As a subject matter expert in microvia reliability and HDI technologies, Magera is widely known for identifying the “weak microvia interface,” a key reliability challenge in advanced interconnect structures. He has been a presenter at the IPC High Reliability Forum, authored multiple technical papers, and is the recipient of ten U.S. patents. Magera’s work continues to shape the understanding and advancement of reliable electronic design and manufacturing.

Michael (Mike) Carano

Mike Carano has over 40 years of experience in the electronics industry, with special expertise in manufacturing, performance chemicals, metals, semiconductors, medical devices, and advanced packaging. A recognized thought leader, subject matter expert (SME), and author, Carano holds 7 U.S. and 20 foreign patents. He has published over 190 articles and presented peer-reviewed technical papers all over the world.

Currently a Technical and Market Intelligence consultant to the Global Electronics Association and a project facilitator for HDP User Group International, Carano has served on more than 20 IPC Standards committees and has spent 14 years as a member of the Global Electronics Association’s Board of Directors. He has developed several professional development courses for the Global Electronics Association, including the Advanced Troubleshooting and Defect Analysis for Printed Circuit Boards.

In 2014, Carano was inducted into the Global Electronics Association (IPC) Raymond E. Pritchard Hall of Fame. He was later honored for his standards work with the Dieter Bergman Fellowship award and most recently received the ANSI Finegan Medal. Previously, he served as VP of Technology Business Development at RBP Chemical Technology and as the Global Director of R&D and Applications Engineering for the OM Group. He holds a BA in Chemistry and an MBA.

Venkat Raja

Venkat Raja is the president of Advint Incorporated, a premier advisory firm delivering technical solutions and specialized training to the global PCB, aerospace, and advanced manufacturing sectors. With over 35 years of leadership in surface finishing, Raja is recognized for engineering high-reliability processes that define industry quality. His career includes senior engineering roles at The Boeing Company and Honeywell, where he contributed to advanced chemical technology programs and filed multiple patent applications. He invented a novel beta-phase tantalum thick deposit and pursued international patent declarations for ionic liquid coatings.

Raja possesses deep expertise across electrolytic, electroless, and PVD technologies, having led complex initiatives for the U.S. Army Research Laboratory and commercialized systems depositing over 24 elements on more than 50 substrate types. He contributes as a member of the AMS B Finishes Committee and has authored a comprehensive technical book covering electrochemistry, plating applications, automation, and quality management. Additionally, he has published over 55 white papers on Advint’s Insights platform, providing critical research on pulse reverse current, cyanide-free chemistries, and next-generation technologies. He holds a BS in Chemistry, an MBA, and Lean Sigma certification.