Patent ID: 6534766
Filing Date: 2003-03-18
Classification: G01N,H01J

Abstract:
A charged particle beam system comprising:a charged particle beam emitting device for generating a charged particle beam and for irradiating a sample to be inspected with said charged particle beam; a stage for supporting the sample thereon; a condenser lens for condensing said charged particle beam which enters from said charged particle beam emitting device along a beam axis of said charged particle beam, the beam axis being substantially perpendicular to a surface of said stage on which the sample is supported; a scanning deflecting device for deflecting said charged particle beam to scan said charged particle beam on the sample; an objective lens for focusing said charged particle beam on the surface of the sample; a slant observing deflecting device, arranged between said objective lens and the sample, for generating a nonuniform magnetic or a nonuniform electric field which deflects said charged particle beam at an arbitrary slant angle from the beam axis so that the trajectory of said charged particle beam is bent, said charged particle beam traveling along the bent trajectory to be obliquely incident on the sample; a charged particle detector for detecting a secondary charged particle and/or a reflected charged particle which are generated from the sample irradiated with said charged particle beam; and a control part for controlling said slant angle.