Patent ID: 9368323
Filing Date: 2016-06-14
CPC Classification: H01J

Claim Text:
1. A charged particle beam device comprising: a charged particle beam column comprising: a charged particle beam control unit, which is configured to control the charged particle beam generation-focusing portion and the deflector, and which comprises a digital/analog converter for converting an input digital signal into an analog signal that is to be input to the deflector; and a field-of-view setting unit configured to set a value of a field of view of the charged particle beam where the scanning by the deflector is performed on the basis of a set value of a slice amount, the field-of-view setting unit being configured to set a value of one-nth of the slice amount, where n is a first natural number, as an input digital value “1” of the digital/analog converter and to set a value obtained by multiplying said value set as the input digital value “1” by a second natural number as a value of the field of view.