Abstract:
PROBLEM TO BE SOLVED: To provide a scanning electron microscope forming an electric field that pulls up electrons discharged from the bottom of a hole or the like with high efficiency even when a sample surface is made of a conductive material.SOLUTION: A scanning electron microscope includes: a deflector for deflecting a scanning position of an electron beam; a sample stage for mounting a sample thereon; and a controller for controlling the deflector or the sample stage so that an underlying lower layer pattern of a pattern to be measured irradiates underlying other patterns with the electron beam before the pattern to be measured is irradiated with the electron beam.
Abstract:
PROBLEM TO BE SOLVED: To provide a specimen holder for highly accurately forming a slowdown electric field which is formed by retarding, in a charged particle beam device such as a scanning electron microscope, and the charged particle beam device.SOLUTION: A specimen holder and a charged particle beam device are proposed. The specimen holder includes a plurality of first grooves for holding a plurality of specimens to be irradiated with beams from the charged particle beam device. The specimen holder further includes second grooves which are formed for each of the first grooves and in which the first grooves are formed, and pressing members which are provided for each of the first grooves and which presses the specimens towards the first grooves. The pressing members are disposed within the second groove. Further, in the case where one groove is included, the specimen holder is disposed in the groove in such a manner that the specimen and the pressing member are accommodated in the groove.
Abstract:
PROBLEM TO BE SOLVED: To provide a technology capable of appropriately selecting and measuring a pattern contour of a measuring object even in a case where contours of patterns approximate with each other, in a sample including a plurality of patterns on the substantially same surface.SOLUTION: A pattern measurement apparatus scans a sample with electric charge particles, creates a detection image by detecting secondary electric charge particles or reflection electric charge particles generated from the sample, and measures a pattern imaged in the detection image. The pattern measurement apparatus includes: an image acquisition unit for acquiring a plurality of detection images that are in the substantially same place of the sample and whose imaging conditions are different from each other; a contour extraction unit for extracting a plurality of pattern contours from the detection images; a contour reconstruction unit for reconstructing a contour of a measuring object by combining the pattern contours; and a contour measurement unit for performing measurement with the reconstructed contour of the measuring object.
Abstract:
PROBLEM TO BE SOLVED: To provide a low speed scanning electron microscope which can detect a reflection electron and a secondary electron even of a low probe current while discriminating.SOLUTION: The scanning electron microscope comprises an electron gun 29, an aperture 26, a sample table 3, an electron optics system 4-1 for focusing an electron beam 31 onto a sample 2, deflection means 10, a secondary electron detector 8, a reflection electron detector 9, and cylindrical electron transport means 5 interposed between the electron gun 29 and the sample 2. The reflection electron detector 9 is disposed in the electron transport means 5 on the side remoter from the electron gun 29 than the secondary electron detector 8 and the deflection means 10, and the sensitive surface 9-1 of the reflection electron detector 9 is wired electrically so as to have the same potential as that of the electron transport means 5.
Abstract:
PROBLEM TO BE SOLVED: To further improve response speed by shortening a drift hour of ions, to raise efficiency in gas amplification caused by an electron avalanche, to improve the efficiency of ion detection, and to improve the image quality of a low-vaccum secondary electron image. SOLUTION: A charged particle beam device which is equipped with a sample board to hold a sample, a sample chamber to store the sample board, an irradiating optical system to irradiate the charged particle beams in the sample chamber, an objective lens to converge the charged particle beams on the sample, has a detector in a space between the objective lens and the sample to detect the secondary charged particles released from the sample by the irradiation of the charged particle beam in which the detector is constituted of a first electrode applied with a positive voltage and at least two sheets of second electrodes which are applied with lower voltages than the positive voltage and sandwich the first electrode. The electric current flowing in either or all of the electrodes is detected as a signal current. COPYRIGHT: (C)2011,JPO&INPIT
Abstract:
PROBLEM TO BE SOLVED: To provide a charged particle beam apparatus and a measuring method that enable the dimensions of a pattern bottom to be measured at high accuracy even with a high-aspect ratio structure.SOLUTION: In a method for measuring the dimensions of a pattern bottom of a sample on which a pattern with a high aspect ratio is formed, a comparison is made between a first scanned image and a second scanned image that are based on signal charged particles that are generated when a charged particle beam is scanned onto the same region of the sample in a first direction and in a second direction inverse to the first direction, the scanned image having a lower signal intensity is taken to be the true value, the scanned image is reconstructed, and the reconstructed scanned image is used to measure the dimensions of the pattern bottom formed on the sample. Also provided is a charged particle beam apparatus for implementing this method.
Abstract:
PROBLEM TO BE SOLVED: To provide a scanning electron microscope which subjects secondary particles to bandpass discrimination in a desired energy region, and detects them at a high yield. SOLUTION: A lens 23 is arranged on an electron source side relative to an object lens 18 and, even when a primary electron beam forms any optical system on an electron gun side by the lens, the primary electron beam is operated to be converged on a convergence point 24 being a specific position. An ExB 16 for a detection part supplying a field acting on tracks of secondary particles generated from a sample 2, is arranged at the convergence point 24 of the primary electron beam, and only the secondary particles in a specific energy range is guided to a detection part 13. Since the position to which the field acting on the tracks of the secondary particles is supplied, is the convergence point of the primary electron beam 19, only the secondary particles having desired energy is guided to the detection part without increasing the aberration of the primary electron beam 19, the bandpass discrimination of energy is effectively carried out, and signal electrons in accordance with an observation objective are discriminated and detected. COPYRIGHT: (C)2009,JPO&INPIT