Novel Technique Advances Super-Resolution Thermoreflectance Microscopy

As electronics shrink, precise nanometer-scale thermal management is crucial. Conventional methods like IR microthermography are limited by diffraction, while contact-based microscopy can disturb heat distribution. Scanning probe thermoreflectance microscopy (SPTRM) solves these issues by combining thermoreflectance with shear force microscopy. Using a non-contact optical fiber probe, SPTRM achieves sub-100 nm resolution without physical or thermal interference. Its co-localized configuration eliminates shadowing, and decoupled spatial resolution allows for material-specific wavelength optimization.

By monitoring reflectance changes as a device operates under intended conditions, SPTRM provides accurate, high-resolution, two-dimensional thermal maps. This non-invasive technique ensures reliable characterization of modern semiconductor-based devices where traditional methods lack the necessary detail.