A defect review system includes a stage, a light source, a turning mirror,
and a ring of collectors. The stage supports and moves an article for
inspection, the article having a surface. The light source provides
light. The turning mirror turns the light toward the surface at an
oblique incident angle whereby the light illuminates a spot on the
surface and the light scatters from the spot. The ring of collectors is
adapted to collect scattering light. A method of reviewing surface of a
wafer is disclosed. The method provides a dark-field mode of operation
adapted to inspect the surface by illuminating a spot on the surface at
an oblique angle and collecting scattering light from the surface.
Further, the method provides a bright-field mode of operation adapted to
inspect the surface by illuminating a spot on the surface at a normal
angle to examine the reflecting light.