Patent ID: 8097849

Claim:
An electron microscope device, comprising a scanning electron microscope and an optical microscope, wherein said scanning electron microscope has scanning means for scanning an electron beam and an electron detector for detecting electrons issued from a specimen scanned by the electron beam, and said scanning electron microscope acquires a scanning electron image based on a detection result from said electron detector, wherein said optical microscope projects an illumination light to the specimen, receives a reflection light from said specimen and acquires an optical image, and wherein an optical axis of said scanning electron microscope crosses an optical axis of said optical microscope at a point of observation of said specimen, wherein said scanning means projects said electron beam for scanning with a scanning width wider than a width of a scanning area, said optical microscope projects an illumination light and acquires an optical image in an overrunning portion where said electron beam is projected beyond said scanning area, and said scanning electron microscope acquires a scanning electron image based on electrons issued when said electron beam scans over said scanning area.