Patent ID: 7417227
Filing Date: 2008-08-26
Classification: G03H,H01J

Abstract:
1. A scanning interference electron microscope, comprising: a specimen stage; an electron optical system for illuminating an electron beam on a specimen placed and held on the specimen stage; and an imaging system for detecting electrons generated from the specimen by the scanning, wherein the electron optical system has an electron gun, means for splitting an electron beam generated by the electron gun into two optical paths, means for scanning one of the electron beams whose optical paths were splitted onto the specimen, and the imaging system has one pair of asymmetric two-dimensional detectors with integration capability for detecting interference fringes of the electron beam having transmitted through the specimen by the electron beam scanning and the electron beam having passed through other electron optical axis, and one of the asymmetric two-dimensional detectors is a detector for phase detection and the other asymmetric two-dimensional detector is a detector for amplitude detection.