| 摘要 |
A scanning electron microscope comprises: an electron beam source, an electron beam acceleration device for accelerating primary electrons generated by the electron beam source, a deflector 5 for scanning and deflecting the accelerated primary electrons, a magnetic-electrostatic compound objective lens 2, 3 for focusing the scanned and deflected primary electrons onto a specimen 4 mounted on a specimen support, a reflection electron detector 10 for detecting reflection electrons generated from the specimen due to focusing and irradiating the primary electrons onto the specimen 4, a secondary electron detector 20 for detecting secondary electrons generated from the specimen due to focusing and irradiating the primary electrons onto the specimen 4, and an image display device for displaying a specimen image from detection signals from each detector 10, 20. Moreover, there is provided an aperture 17 around an axis for passing an electron beam and secondary electrons around the axis through the reflection electron detector 10. This gives a: scanning electron microscope device which can separate and detect on an electron beam axis, reflection electrons and secondary electrons from a specimen, with a device of a simple construction.
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