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    • 6. 发明专利
    • CHARGE PREVENTING METHOD USING CONVERGED ION BEAM WORKING AND OBSERVING DEVICE
    • JPH09274878A
    • 1997-10-21
    • JP8120596
    • 1996-04-03
    • HITACHI LTDHITACHI INSTRUMENTS ENG
    • MUTO KATSUMI
    • H01J37/20H01J37/256H01J37/305
    • PROBLEM TO BE SOLVED: To provide a charge preventing method for discharging charge, which is generated and stored in an insulating layer as an object of observation by the irradiation of Ga ion beam, by forming a deep hole from the surface of a multi-film sample, which includes an insulating layer to be observed, to the insulating layer with a converged ion beam working and observing device. SOLUTION: A deep hole in a desirable shape is formed at an arbitrary place of the multi-film sample having a conductive layer 13 made of Si film and the insulating layer 14 made of SiO2 film from the surface of a multi-film sample to an insulating layer 14 as an observation object by working of a converged ion beam working and observing device (FIB) except for an FIB working place. A column 11 is formed in the worked deep hole by a tungsten (W) deposition with a tungsten deposition gun, and by the column 11 by W deposition, the conductive layer 13 and a sample fixing plate for the multi-film sample, a charge flow-out passage from the insulating layer 14 is formed. With this structure, charge generated and stored in the insulating layer 14 by the irradiation of Ga ion beam in flowed out through the charge flow-out passage, and charge is prevented, and observation of the insulating layer 14 is thereby enabled.