Patent ID: 8581484
Filing Date: 2013-11-12
Classification: H01J

Abstract:
1. A liquid metal ion gun comprising: a liquid metal member that is made of a first metal material; a liquid metal ion source that includes a reservoir and a emitter, the reservoir being made of a second metal material and holding the liquid metal member, the emitter being made of the second metal material; and a beam limiting aperture that is formed with a liquid metal member made of the first metal material placed on a base made of the second metal material, has an opening enabling an ion beam extracted from the liquid metal ion source to pass therethrough, and limits the diameter of the ion beam, wherein the beam limiting aperture has a structure that causes the liquid metal member to gather into a region located around the opening, the base has a recessed portion that is provided so as to include the opening, and a distance between the opening and an outer circumference of the recessed portion is smaller than a capillary length of the liquid metal member made of the first metal material.