Patent ID: 8729467
Filing Date: 2014-05-20
Classification: F16F,H01J

Abstract:
1. A charged particle radiation device comprising: a sample chamber configured to have a sample in an inside thereof; a charged particle optical lens barrel including a charged particle optical system configured to irradiate the sample with a charged particle radiation beam; and a vibration damping member including an end secured to an upper surface of the sample chamber and another end secured to the charged particle optical lens barrel, wherein the vibration damping member includes a viscoelastic sheet, and a plurality of support plates holding the viscoelastic sheet; wherein the vibration damping member is disposed so that a sheet surface of the viscoelastic sheet is not perpendicular to a center axis of the charged particle optical lens barrel and so that a normal to a cylindrical surface of the charged particle optical lens barrel at a position to which the vibration damping member is attached and a normal to a sheet surface of the viscoelastic sheet are at least not parallel to each other, and wherein the vibration damping member is disposed so that a sheet surface of the viscoelastic sheet is vertical to an upper surface of the sample chamber.