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Precision Metrology and Instrumentation Group (PMIG)

Texas A&M University College of Engineering

Current Research

Topic 0: Glass interposer metrology and inspection (unconventional 3D imaging)

Topic 1: TSV/TGV metrology by unconventional interferometry

Topic 2: Defect mode (air bubbles, particles, potential pattern errors, etc.) inspection of hybrid bonded wafers by thermography and thermo-acoustic spectroscopy

Topic 3: Hybrid bonded wafer layer inspection by Electro-chemical Impedance Spectroscopy (EIS)

Topic 4: Wafer-chuck geometric compliance design for CD enhancement in lithography

Topic 5: LER/VER characterization by waveguide-based darkfield microscopy

Topic 6: Thin-film warpage metrology by reflection spectroscopy

Topic 7: Battery cell defect inspection by photoacoustic spectroscopy

Previous Research

Wafer metrology and inspection

Wafer bonding layer metrology and inspection

Via metrology and inspection

Photomask metrology and inspection

Metrology-guided repair engineering

3D Thermography for surface metrology

Strobo-stereo-spectroscopy

Machine tool metrology for manufacturing process control and automation

Cutting tool wear measurement and instrumentation

3D Particle inspection and classification

Nondestructive testing and instrumentation

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