Patent ID: 9159530
Filing Date: 2015-10-13
Classification: H01J

Abstract:
1. A sample holder for an electron microscope for radiating an electron beam on a sample that is placed in a vacuum sample chamber and taking an image of the sample, the sample holder is disposed within the vacuum chamber, the sample holder comprising, a vessel in which a substance for a gas source is stored; a sample stage on which the sample is disposed; a communication hole to supply gas generated from the substance to the sample on the sample stage; and a first cap member covering and sealing the vessel to maintain a vacuum state having a recess portion formed on an upper side of the first cap member, wherein the sample stage is disposed in the recessed portion, wherein the first cap member has a through hole, supplying gas generated from the substance to the sample, bored through a bottom of the recess portion having a diameter smaller than an inner diameter of the recess portion and is a part of the communication, wherein a flow restriction member is disposed inside the recess portion, in the through hole, and below the sample stage, wherein a flow restriction member holder is provided for fixing the flow restriction member at a predetermined position in the recess portion, and wherein a through hole is bored through the flow restriction member through which the gas flows.