Patent ID: 7755044

Claim:
An apparatus for working and observing samples, comprising: a sample plate on which a sample is to be placed; a first ion beam lens barrel capable of irradiating said sample placed on said sample plate with a first ion beam over a whole predetermined irradiation range at one time; a mask that can be arranged between said sample plate and said first ion beam lens barrel, and shields part of said first ion beam; mask-moving means capable of moving said mask on an XY-plane which intersects the irradiating direction of said first ion beam of the first ion beam lens barrel nearly at right angles; a charged particle beam lens barrel capable of scanning a focused beam of charged particles in said range irradiated with said first ion beam; and detection means capable of detecting a secondarily generated substance generated by the irradiation of said sample or said mask with said beam of charged particles from said charged particle beam lens barrel.