Patent ID: 9261360
Filing Date: 2016-02-16
CPC Classification: G01B,H01J

Claim Text:
1. A charged particle beam microscope comprising: a microscope unit including a charged particle source, a sample stage, and a detector for detecting charged particles from a sample placed on the sample stage due to irradiation with charged particles emitted from the charged particle source; and a control unit including a data processing section for converting a detection signal from the detector into a frame image and adding together a plurality of frame images to make an image for length measurement, an image memory for saving the frame images, and an arithmetic processing section for computing dimensions of a pattern formed on the sample from the image for length measurement, wherein the data processing section has a function to form a plurality of multiple-frame images by adding together a smaller number of frames than the number of frames constituting the image for length measurement, a plurality of single frame images, or a plurality of subframe images by using the plurality of frame images provided for configuring the image for length measurement, and, in parallel, to generate identification information of a pattern depending on specific changes of frame number of the pattern included in the plurality of multiple-frame images, the plurality of single frame images, or the plurality of subframe images, or depending on specific changes of length measurement value or tone value based on changes in irradiation time of the charged particles.