Patent ID: 7705304
Filing Date: 2010-04-27
Classification: H01J

Abstract:
1. A scanning electron microscope including a multiply-segmented backscattered electron detector for detecting a backscattered electron emitted from the surface of a sample as the surface of the sample is two-dimensionally scanned with an electron beam, the scanning electron microscope comprising: a signal switching section for switching detection signals from the segmented backscattered electron detector after every scanning unit; a memory having storage regions of the number of the segments of the backscattered electron detector; and a control section for switching the detection signals and the storage regions of the memory for every signal detection processing of a single scanning unit, for acquiring image data in scanning units of the number of the divisions, and for performing a calculation processing for three-dimensional shape measurement on the basis of the position of the backscattered electron detector and the intensity of the detection signal.