Thin Film Characterization in Semiconductor Systems

Thin film characterisation lies at the heart of semiconductor research and device fabrication, offering critical insights into structural, optical and electronic properties at nanometre scales. As feature sizes shrink into the two-dimensional regime, precise measurement of thickness, composition, interface quality and defect states becomes imperative. A diverse suite of techniques—ranging from optical spectroscopic methods and X-ray scattering to electron microscopy and scanning probe approaches—enables comprehensive analysis of crystallinity, surface morphology, stress evolution and carrier dynamics. Advances in in situ and operando measurements further support real-time monitoring during film growth and post-processing, guiding optimised deposition protocols and material engineering for applications in transistors, sensors, photovoltaics and quantum devices.

Research from Nature Portfolio

Recent studies have harnessed spectroscopic ellipsometry with enhanced wavelength coverage and model-based inversion to resolve sub-nanometre thickness variations and optical anisotropy in high-k gate dielectric films, achieving refractive index precision better than 0.5% across wafer-scale samples. Ultrafast electron microscopy experiments have captured transient strain relaxation and defect formation in III–V heteroepitaxial layers during pulsed laser annealing, revealing atomic-scale pathways for non-equilibrium structural transformations. In situ grazing incidence X-ray scattering integrated within molecular beam epitaxy chambers has enabled real-time observation of surface reconstruction and layer-by-layer growth kinetics in two-dimensional semiconductor heterostructures, directly informing growth parameter optimisation to suppress dislocation formation and improve film uniformity.

Thin Film Characterization in Semiconductor Systems publication trend

The graph below shows the total number of articles in thin film characterization in semiconductor systems across all publications each year (not limited to Nature Index journals).

Technical terms

Spectroscopic ellipsometry: Optical technique measuring changes in polarisation upon reflection to extract thin film thickness and complex refractive index across a spectrum of wavelengths.

Grazing incidence X-ray scattering (GIXS): Surface-sensitive X-ray method using shallow incidence angles to probe near-surface structure and layer morphology of thin films.

Ultrafast electron microscopy: Imaging approach combining electron diffraction with femtosecond-scale pulses to investigate dynamic structural changes at atomic resolution.

Atomic force microscopy (AFM): Nanoscale surface imaging via a sharp probe scanned in contact or non-contact mode to map topography and mechanical properties.

Photothermal reflectance microscopy: Technique that detects reflectance changes induced by local heating to map thermal and optical property variations at sub-micrometre scales.