Patent ID: 7372051

Claim:
An electric charged particle beam microscopy wherein a specimen is irradiated with a charged particle beam, and secondary charged particles generated by the specimen are detected to thereby obtain an image of the specimen, the microscopy comprising: a step of taking a first image with a known magnification relative to the specimen by irradiating the specimen with the charged particle beams under a first control condition; a step of taking a second image having a common field of view with the first image by irradiating the specimen with the charged particle beam under a second control condition; a step of image processing for analyzing a magnification of the second image relative to the first image from the common field of view; a step of calculating the magnification of the second image relative to the specimen from the magnification of the first image relative to the specimen, and the magnification of the second image relative to the first image; and a step of recording the magnification of the second image relative to the specimen along with the second control condition.