The Necessary Evolution of Thermal Metrology

Rising power density, 3D integration, and the use of innovative materials are pushing the limits of traditional thermal measurement techniques in the semiconductor industry. Thermal management has become a primary constraint on semiconductor scaling, surpassing lithography.

Projections indicate heat fluxes exceeding 1,000 W/cm² for next-generation accelerators. The extreme properties of new materials, such as nanoscale thin films and ultra-high-conductivity materials (diamond, BAs, BNNTs), and devices operating above 200 °C in wide-band gap systems, redefine thermal design requirements.

Reliability and Interfaces

Interfaces and buried layers have become key determinants of reliability. Thermal boundary resistance at bonded interfaces, TIM layers, and dielectric stacks accelerates reliability issues. A design workflow that considers thermal aspects from the early stages can integrate measured and scale-appropriate thermal properties, calibrating models, reducing uncertainty, and preventing costly failures in the advanced stages of advanced packaging and 3D architectures.