Patent ID: 8003939
Filing Date: 2011-08-23
Classification: G06F,H01J,Y10T

Abstract:
1. A foreign matter detecting apparatus comprising: a detecting member for detecting foreign matter by measuring smoothness of a surface of an object undergoing measurement, said detecting member being selected from the group consisting of a scanning electron microscope, a reflection electron microscope, an ion microscope, an electrical force microscope, and a magnetic force microscope; a marking device for providing a dent on the surface of the object, with a predetermined distance from the foreign matter, being detected by said detecting member; and a mass spectrum measuring device for irradiating and scanning, with a primary ion beam, a small area, as a part of the object, including the foreign matter and the dent, so as to measure a mass spectrum of secondary ions emitted from the foreign matter, located at a position within the predetermined distance from the dent.