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    • 22. 发明专利
    • ELECTRON BEAM-EXCITED ION SOURCE
    • JPS63190229A
    • 1988-08-05
    • JP2130287
    • 1987-01-31
    • TOKYO ELECTRON LTDRIKAGAKU KENKYUSHO
    • ISHII NOBUOTAKAYAMA NAOKIKAWAMURA GOHEIHARA TAMIOHAMAGAKI MANABUNANBA SUSUMUAOYANAGI KATSUNOBU
    • H05H1/24H01J27/20H01J37/08
    • PURPOSE:To efficiently generate a large quantity of ions and obtain an ion beam with low energy and a large current by providing an ion generation chamber, a means radiating an electron beam to generate ions, and a means forming the multi-pole magnetic field in the chamber. CONSTITUTION:An anode 2 made of a Mo thin plate disk arranged with many small through holes 2b, 3b except on the periphery and an accelerating electrode 3 are arranged at a fixed distance in an enclosed container 1. A cathode tube 4 made of Ta with a through hole 5 is arranged on a side wall 1a facing the electrode 2. A conductive plate with a narrow path 6 (fine hole) is inserted between the electrodes 4 and 2, and the most portion of the anode 2 side is covered with an insulating material 7. Ar is introduced through the electrode 4, and the discharge voltage 8 is applied across the electrodes 4 and 2 to generate plasma. The electrode 3 extracts and accelerates electrons and feeds them into a chamber 10. Many permanent magnets 10a with different polarity at adjacent positions are arranged on the conductor wall of the chamber 10 having the same potential as the electrode 3, As gas is fed, the introduced electron beam collides with As molecules to generate dense plasma, which is enclosed by the magnets 10a and extracted through slits 11, 12.
    • 27. 发明专利
    • X-RAY MICROSCOPE AND X-RAY GENERATING APPARATUS
    • JPH08194100A
    • 1996-07-30
    • JP547795
    • 1995-01-18
    • SHIMADZU CORPRIKAGAKU KENKYUSHO
    • HIROSE HIDEOHARA TAMIOANDO KOZOAOYANAGI KATSUNOBU
    • G21K5/02G21K7/00H05G1/26
    • PURPOSE: To provide an x-ray generating apparatus which can prevent scattered particulates from being emitted by keeping a distance in one side of a target material and forming an x-ray transmissive film with just enough thickneess to prevent damage by effects following an x-ray generating process. CONSTITUTION: Plasma generated by laser beam irradiation is closed in a space 14 surrounded with an x-ray generating target 11 and an x-ray transmissive film 12 and efficient x-ray generation is performed. In this case, a hole as small as 0.1μm diameter is opened in the x-ray generating target 11 by laser beam 30. The generated x-ray is emitted to a specimen side after being transmitted through the x-ray transmissive film 12 and at the same time radiates the laser source side through the hole. On the other hand, the particulates generated from plasma come into collision against the x-ray transmissive film 12 and the kinetic energy of the particles are absorbed and the particulates are retarded, do not pass the x-ray transmissive film 12, and are captured by the x-ray transmissive film 12. Consequently, scattered particulates adhere to the x-ray transmissive film 12 and emission of the scattered particulates are inhibited.
    • 28. 发明专利
    • ELECTRON BEAM SOURCE
    • JPH06302291A
    • 1994-10-28
    • JP11098393
    • 1993-04-14
    • RIKAGAKU KENKYUSHO
    • HAMAGAKI MANABUHARA TAMIO
    • H01J37/077H05H1/46
    • PURPOSE:To concentrate plasma generation on a porous site only and to enhance the output efficiency of electron beams by covering the surface of the cathode side for generating plasma of a porous anode for generating plasma except the porous site with an insulating member. CONSTITUTION:A cathode 18 for generating plasma, a porous anode 14 for generating plasma, and a porous electrode 16 for accelerating electron beams are placed in that order. The porous electrode 14 for generating plasma generates plasma between the porous electrode 14 for generating plasma and the cathode 18 for generating plasma and is provided with a porous site (A) having many punched transmitting holes 14 for transmitting generated plasma electrons. The porous electrode 16 for accelerating electron beams pulls out electrons from the transmitting holes 14a of the porous anode 14 for generating plasma for acceleration and has a porous site having many punched transmitting holes 16a for transmitting the pulled out and accelerated electrons. The surface of the cathode side 18 for generating plasma of the porous anode 14 for generating plasma, except the porous site (A), is covered with an insulating member 50. Thus, discharged plasma is concentrated on the porous site only to enhance the pulling out efficiency of the electron beams.