Patent ID: 9105440
Filing Date: 2015-08-11
Classification: H01J

Abstract:
1. An apparatus of plural charged particle beams, comprising: a specimen stage, which sustains a specimen thereon; and multiple sub-columns, which are placed above an observed surface of said specimen and respectively perform one of multiple functions for observing said observed surface, wherein a first function of said multiple functions is high-throughput inspection of interested features on said observed surface, and a second function of said multiple functions is high-resolution review of said interested features on said observed surface, wherein each of said multiple sub-columns comprises: wherein said magnetic objective lenses of said multiple sub-columns are formed by a multi-axis magnetic objective lens which comprises: wherein each of said magnetic objective lenses is one of said multiple magnetic objective sub-lenses, and said magnetic objective sub-lenses inside said sub-columns performing different functions are different in geometric shape.