NT 2000 Automatic Optical

The Veeco NT 2000 Automatic Optical is a metrology and inspection system manufactured by Veeco Instruments.^[1]

Optical profilers in this class operate on white-light interferometry or phase-shifting interferometry principles. A broadband light source is split into a reference beam and a measurement beam; the recombined beam creates interference fringes that encode surface height information. An imaging sensor captures the fringe pattern and software reconstructs a three-dimensional surface map with nanometer vertical resolution.

The automatic configuration includes a motorized X-Y stage for positioning, an autofocus system, and software that can execute measurement sequences across multiple sites on a substrate without operator intervention. Integration with robotic wafer handlers is common in production environments.

In semiconductor manufacturing, automatic optical profilers are used for in-line or off-line metrology after critical process steps such as chemical-mechanical planarization, etching, deposition, and lithography. The measurements verify surface planarity, step height, and film thickness uniformity without contacting the wafer.

Key applications include measuring surface roughness, step heights, and trench depths in MEMS, advanced packaging, and integrated circuit manufacturing. Optical profilers are also used for inspecting defects such as scratches, pits, and particles on wafers and masks.

Beyond semiconductors, the Veeco NT 2000 Automatic Optical class of instrument is applied in optical lens fabrication, flat panel display production, and general materials science where non-contact surface characterization is required.