Patent ID: 9029766
Filing Date: 2015-05-12
Classification: H01J

Abstract:
1. A scanning electron microscope comprising: an electron source generating an electron beam to be used as a probe; an aperture limiting a diameter of the electron beam; a specimen holder on which a specimen to be irradiated with the electron beam is placed; an objective lens for converging the electron beam on a surface of the specimen; a deflection means for scanning the electron beam on the specimen to be irradiated with the electron beam; a secondary electron detector detecting secondary electrons from the specimen; a backscattered electron detector detecting backscattered electrons from the specimen or conversion electrons deriving from the backscattered electrons; and a cylindrical electron transport means in a position between the electron source and the specimen to be placed on the specimen holder, wherein a detector plane of the backscattered electron detector is located inside the electron transport means and on a farther side from the electron source than the secondary electron detector and the deflection means, and the detector plane of the backscattered electron detector is electrically coupled to have the same potential as the electron transport means.