University Politehnica of Bucharest

Contact persons:

Marius Enachescu 
Iiulian Boerasu
Splaiul Independenței 313,
060042 București,
Roumanie

Main expertises

  • FIB-SEM & correlative STEM-EDX/EELS analysis (STEM 0.14 nm; SEM 0.5 nm) for buried interface and nanoscale defect characterization
  • Co-localized XPS-ISS-µRaman-REELS analysis (XPS ~5-10 nm depth; Raman ~1-2 µm lateral resolution) for chemical and electronic structure characterization
  • Second Harmonic Generation (SHG) imaging for strain- and symmetry-related variation mapping
  • MX-µRaman for stress/strain, structural, and compositional characterization of 2D materials and heterostructures
  • AFM-based surface roughness metrology (RMS/Ra) and Power Spectral Density (PSD) analysis for 2D materials
  • MX-µRaman for structural characterization of 1D semiconductor nanostructures and devices
  • Electrical AFM (C-AFM, SSRM, SCM, KPFM, EFM) for characterization of electrically active structures and devices
  • AFM/AFM-IR for defect and contaminant detection, localization and evaluation in 1D nanostructures
  • MX-µRaman for lattice contraction, internal strain  and structural phase change
  • FIB-SEM & correlative STEM-EDX/EELS analysis (STEM 0.14 nm; SEM 0.5 nm) for buried interface, oxide integrity and nanoscale defect characterization
  • AFM-IR for chemical characterization of amorphous oxide semiconductor FETs

Research interests

  • Metrology capability extension to emerging semiconductor architectures
  • Exploratory characterization of novel semiconductor materials and devices
  • Advanced characterization for beyond-CMOS platforms

Main expertises

  • FIB-SEM & correlative STEM-EDX/EELS analysis (STEM 0.14 nm; SEM 0.5 nm) for buried interface and nanoscale defect characterization
  • Co-localized XPS-ISS-µRaman-REELS analysis (XPS ~5-10 nm depth; Raman ~1-2 µm lateral resolution) for chemical and electronic structure characterization
  • AFM-based surface roughness metrology (RMS/Ra) and Power Spectral Density (PSD) analysis
  • AFM-based failure analysis (C-AFM, SSRM, SCM, KPFM, EFM, nanomechanics, AFM-IR)
  • MX-µRaman for stress/strain detection and quantification
  • Electrical AFM (C-AFM, KPFM/EFM, SSRM, SCM) for nanoscale electrical and electrostatic characterization of charge-based, resistive and capacitive memory devices
  • Electrical AFM (C-AFM, KPFM/EFM, SSRM, SCM) for nanoscale leakage, charge trapping and electrostatic characterization of ultra-low-power devices
  • MX-µRaman for lattice expansion and anharmonicity, phonon-phonon scattering mechanisms, and hotspots detection at the micrometer scale (1-2µm)

Research interests

  • Semiconductor process control, quality inspection and technology qualification
  • Advanced metrology for device scaling and process integration
  • Failure analysis of advanced semiconductor technologies

Main expertises

  • Sensor testing allowing to control thermo-hygrometric states (T, RH), gas flow dynamics (concentration, flow rate, pumping), and chrono-amperometric configurations
  • FIB-SEM & correlative STEM-EDX/EELS analysis (STEM 0.14 nm; SEM 0.5 nm) for buried interface analysis, nanoscale interdiffusion, oxide formation and defect characterization
  • AFM-IR for topography-correlated nanoscale chemical characterization (res. <10 nm), including defect and contaminant detection in heterogeneous photonic structures
  • Co-localized XPS-ISS-µRaman-REELS analysis (XPS ~5-10 nm depth; Raman ~1-2 µm lateral resolution) for chemical and electronic structure characterization
  • MX-µRaman/HRXRD for stress/strain detection and quantification
  • Modular power test platform for advanced electrical characterization of power devices (off-state leakage up to 3kV; pA sensitivity; DC I-V up to 1A; pulsed I-V up to 10/800A with pulse widths down to 1 μs; integrated C-V)
  • X-ray computed µ-tomography (µCT; 130 kV microfocus, voxel resolution down to ~2 µm) for non-destructive 3D inspection of packaging defects and internal structural features
  • Environmental endurance and reliability testing (temperature/humidity), correlated with before and after e-beam inspection (SEM-EDX) for degradation mechanism analysis

Research interests

  • Advanced characterization of photonic, power and sensing semiconductor technologies
  • Materials and interface analysis for heterogeneous functional devices
  • Reliability and failure analysis of semiconductor devices

Main expertises

  • X-ray computed µ-tomography (µCT; voxel resolution down to ~2 µm) for non-destructive 3D inspection of advanced packaging structures, including RDLs, Cu pillars/micro-bumps, TSV interconnects, and hybrid bonding interfaces (oxide-oxide, Cu-Cu)
  • FIB cross-sectioning and HR SEM imaging (SEM res. – 0.7 nm) for localized failure analysis, microstructural characterization, and dimensional metrology of metallization stacks, interconnects, and 2.5D/3D integrated assemblies
  • AFM-based nanomechanical assessment of dielectric and redistribution layers for material uniformity, local mechanical property evaluation, and process-induced modification analysis
  • Environmental endurance and reliability testing (temperature/humidity), correlated with before and after e-beam inspection (SEM-EDX) for degradation mechanism analysis

Research interests

  • Advanced packaging, heterogeneous integration and system-level reliability