Patent ID: 8742342
Filing Date: 2014-06-03
Classification: H01J

Abstract:
1. An electron microscope that provides an image using a secondary signal generated from a sample irradiated with an electron beam, the electron microscope comprising: an electron source; an objective lens that focuses the electron beam emitted from the electron source; a magnetic body provided between the objective lens and the sample; and a non-magnetic body provided between the objective lens and the sample; wherein: the magnetic body has a continuous structure and an inside diameter larger than an inside diameter of an upper pole piece that forms the objective lens, the non-magnetic body has a continuous structure and an inside diameter smaller than the inside diameter of the upper pole piece that forms the objective lens, the non-magnetic body has a trench that stores the magnetic body, the magnetic body is disposed in the trench, and the magnetic body is disposed at a position closer to the objective lens than the non-magnetic body.