Patent ID: 7078688
Filing Date: 2006-07-18
Classification: G01B,H01J

Abstract:
1. A shape measuring apparatus comprises a charged particle beam apparatus comprising: a charged particle gun for emitting a charged particle beam, a scanning deflector for deflecting the charged particle beam on a sample, a detector for detecting charged particles emitted from an area scanned by the charged particle beam on the sample, and an image processor for measuring detected charged particles signal, wherein the image processor performs steps comprising: irradiating the charged particle beam to the sample at a first angle, and measuring charged particles to generate a first signal, irradiating the charged particle beam to the sample at a second angle, and measuring charged particles to generate a second signal, varying a parameter indicating a relation between the first signal and a height of the sample or an inclination angle of the sample until the first signal achieves the second signal, and measuring the height of the sample or the inclination angle of the sample from detected charged particles based on the selected parameter.