Patent ID: 6122046
Filing Date: 2000-09-19
Classification: G01N

Abstract:
A dual resolution inspection system for inspecting a substrate, comprising:an illumination system comprising a light source producing an illuminating beam directed along a path to said substrate, and a deflection system for scanning said illuminating beam on at least a scan line of said substrate;an illumination objective for focusing said illuminating beam on said substrate and for collecting light reflected therefrom whereby a collected light beam is formed, said collected light beam being angularly wider than said illuminating beam;at least one dark field detector for detecting scattered light scattered from said substrate;an array light detector; andan optical system disposed between said illumination system and said illumination objective for diverting said collected light beam from an optical path connecting said illumination system and said illumination objective and focusing said collected light beam, after said collected light beam passes said illumination objective, onto said array light detector.