Abstract:
PROBLEM TO BE SOLVED: To provide a focused ion beam apparatus which enables the shortening of a down time for replacement of an emitter and the increase in operation rate.SOLUTION: A focused ion beam apparatus comprises: an ion source room 10 in which an emitter 11 capable of emitting an ion beam is provided; a focused ion beam barrel 20 for focusing and directing the ion beam emitted by the ion source room 10; a preliminary chamber 30 whose inside communicates to inside the focused ion beam barrel 20 through a first communicating hole 21; a pump 35 for the preliminary chamber for evacuating the preliminary chamber 30 to create a vacuum; an on-off valve 40 for opening and closing the first communicating hole 21; and a transport device 45 for transporting the ion source room 10 to inside the focused ion beam barrel 20 and the preliminary chamber 30 through the first communicating hole 21.
Abstract:
PROBLEM TO BE SOLVED: To provide a focused ion beam device which efficiently carries out fine patterning with less damage to a sample by using a gas field ionization ion source.SOLUTION: A focused ion beam device includes a gas field ionization ion source having: an emitter 41 for emitting an ion beam 1; an ion source chamber 40 for housing the emitter 41; a gas supply part 46 for supplying nitrogen to the ion source chamber 40; an extraction electrode 49 for applying an extraction voltage to ionize and extract nitrogen ions; and a temperature control part 34 for cooling the emitter 41.
Abstract:
PROBLEM TO BE SOLVED: To provide an emitter structure which can enhance the cooling efficiency of an emitter, and can hold the emitter stably with high accuracy for a base member, while reducing the number of components or simplifying the device, and to provide a gas ion source and a focused ion beam device.SOLUTION: An emitter structure includes a pair of electrification pins 65 fixed to a base material 61, a filament 66 connected between the pair of electrification pins 65, and an emitter 52 connected with the filament 66 and having a sharpened tip. A support member 54 is fixed to the base material 61, and the emitter 52 is connected with the support member 54.
Abstract:
PROBLEM TO BE SOLVED: To provide a focused ion beam device which can produce an ion current stably regardless of the termination structure at the tip of an emitter, and to provide an irradiation method of a focused ion beam.SOLUTION: A focused ion beam device 1 includes an emitter 10 having a sharpened tip, an ion source chamber 20 housing the emitter, a gas supply section 11 for supplying gas having ionization energy lower than that of helium to the ion source chamber 20, and an extraction power supply 15 for producing gas ions by ionizing gas at the tip of an emitter 10, by applying an extraction voltage between the emitter 10 and an extraction electrode 14, and then extracting the gas ions to the extraction electrode 14 side. The extraction power supply 15 applies an extraction voltage so that the number of the bright spot of a field ion image in an ion beam emitted from the emitter 10 is one.
Abstract:
PROBLEM TO BE SOLVED: To provide an emitter that can have a crystal structure at its topmost end put back into the original state with good reproducibility by re-arraying of atoms by treatment, can suppress a rise in lead voltage after retreatment, and can be used for a long period.SOLUTION: There is provided a method of manufacturing an emitter that includes: an electrolytic polishing step S10 of electrolytically polishing a tip portion of an emitter raw material so that the diameter gradually decreases toward the tip; a first etching step S20 of forming a pyramidal pointed portion having a tip as a peak by performing etching processing by irradiating a processed portion of the emitter raw material with a charge particle beam; a second etching step S30 of making the tip more pointed through electric field induction gas etching processing while observing the crystal structure atop of the pointed portion through an electric field ion microscope, and making the number of atoms constituting the topmost end constant or less; and a heating step S40 of heating the emitter raw material to array the atoms constituting the topmost end of the pointed portion in a pyramidal state.