DIAMOND INTEGRATION FOR ELECTRONICS COOLING

This book provides a practical, research-led guide to integrating Chemical Vapor Deposition (CVD) diamond films for next-generation electronics cooling. Drawing on contributions from academia, national laboratories, and industry, Diamond Integration for Electronics Cooling highlights real-world implementations in high-power, high-frequency systems. The thermal management of high-power density electronics—particularly devices made from wide bandgap semiconductors—has recently advanced through the integration of heat spreading materials at the die level. Among the approaches being pursued, the use polycrystalline and single crystalline diamond films have shown the most promise due to the high thermal conductivity of diamond and the scalable integration through direct growth onto the die. This book explores the critical aspects of developing diamond films and methods of integration to improve the thermal management of high power density devices. It guides the reader through the fundamentals of the thermal conductivity of CVD diamond films, steady state and transient characterization of their thermal conductivity, and addresses the thermal properties of polycrystalline diamonds. The book then covers methods for growth of nanocrystalline CVD diamond films using microwave plasma CVD. This includes the methodology for the transfer of carbon from methane into the diamond lattice, diamond seeding to promote growth, and the growth mechanisms that impact grain structure and size. Finally, the integration and impact on electronic devices is covered. Building on this, the book covers the direct growth of diamond onto the backside of GaN RF devices at the wafer scale and its impact on device performance, and the development of metal-diamond composites for the packaging of high power density electronics.