Patent ID: 8927930
Filing Date: 2015-01-06
Classification: H01J

Abstract:
1. A charged particle device comprising: a cylindrical column; a charged particle beam optical system disposed in the column; a sample stage disposed on the column; and a support device supporting the column, wherein: the support device includes a simply supported structure simply supporting the column at a plurality of support points set along an axial line direction of the column, and when the positions of two nodes in the case of a first order mode of vibration of a beam having a free ends at both ends, the column being considered as the beam, are successive points P1 and P2, and the positions of three nodes in the case of a second order mode of vibration are successive points Q1, Q2, and Q3, the support points for the column are disposed at a first support point between the points P1 and Q1, and at a second support point between the points P2 and Q3.