Patent ID: 6555819
Filing Date: 2003-04-29
Classification: H01J

Abstract:
A scanning electron microscope comprising an electron source for generating an electron beam, a focusing lens for focusing said electron beam, a magnetic field type object lens for finely limiting said focused electron beam and irradiating the same onto a sample, a deflector for two-dimensionally scanning said electron beam on said samples a detector arranged on an electron source side of said object lens so as to detect a signal emitted from said sample by irradiation of said electron beam, display means for displaying said signal detected by said detector as a sample image, deceleration electric field generation means for generating an electric field for decelerating said electron beam to be irradiated onto said sample, and voltage control means for controlling a voltage applied to said deceleration electric field generation means, wherein said voltage control means controls said voltage to be applied to said deceleration electric field generation means so that reflected electrons emitted in a direction at a small angle with said sample surface among said signal generated from said sample are detected by said detector, and a sample image having effects of light and shade in correspondence with irregularity of said sample surface can be obtained.