Abstract:
An electron beam apparatus for evaluating a sample face which comprises a primary electro-optical system irradiating the sample with primary electron beams, a detection system, and a secondary electro-optical system directing the secondary electron beam generated from the sample face by irradiation with the primary electron beam to the detection system. The electron beam apparatus is characterized by comprising a multi-beam generator included in the primary electro-optical system to generate electrons emitted from an electron gun as primary electron beams, a scanning deflector included in the primary electro-optical system to scan the sample simultaneously with the primary electron beams, an objective lens included in common in the primary electro-optical system and the secondary electro-optical system to irradiate the sample with decelerated primary electron beams and to accelerate the secondary electron beams emitted from the irradiated point on the sample with the primary electron beams, a secondary electron beam separator included in the primary and secondary electro-optical systems to deflect the secondary electron beams passing through the objective lens from the primary electro-optical system to the secondary electro- optical system, a magnifying lens of at least one stage included in the secondary electro-optical lens to magnify the deflected secondary electron beams, and detectors included in the detection system and provided in accordance with the secondary electron beams for the secondary electro-optical system to detect secondary electron beams.
Abstract:
An electron beam device for applying a primary electron beam onto a sample, and detecting a secondary electron beam produced from a sample surface by the irradiation to evaluate the sample surface, characterized in that the cathode of an electron gun for emitting primary electron beam have a plurality of emitters disposed at intervals on one circle centered on the optical axis of a primary electron optical system and emitting a primary electron beam, and the plurality of emitters are disposed so that points projected on a line parallel to the scanning direction of the primary electron beam are arranged at equal intervals.
Abstract:
An electron beam inspection apparatus comprising an electrooptical unit (70) comprising an electrooptical system for irradiating an object with a primary electron beam from an electron source and projecting the image of secondary electrons emitted from the object and a detector for detecting the image of secondary electrons projected from the electrooptical system, a stage unit (50) for moving the object relatively to the electrooptical system while holding it a mini-environment unit (20) for blocking adhesion of dust to the object by supplying cleaning gas thereto, a working chamber (31) containing the stage unit and controllable to vacuum atmosphere, at least two loading chambers (41, 42) disposed between the mini-environment unit and the working chamber and controllable independently to vacuum atmosphere, and a loader (60) for feeding the object to the stage unit through the loading chambers.
Abstract:
A wafer inspecting instrument for inspecting a pattern formed on a wafer by irradiating the wafer with a charged particle beams. The wafer inspecting instrument comprises a charged particle beam generating means, a primary optical system including a means for irradiating a multi-aperture plate having a plurality of apertures with a charged particle beam generated from the beam generating means and for focusing a plurality of charged particle beams having passed through the apertures in the wafer surface, a secondary optical system which secondary charged particle beams radiated from the wafer enter, an electron beam apparatus including a detection system for detecting the secondary charged particle beam to output an electric signal and a processing control system for processing and evaluating the electric signal, a stage apparatus for holding and moving the wafer, and a working chamber which can be controlled to a desired atmosphere.