公开(公告)号：JP2000011853A

公开(公告)日：2000-01-14

申请号：JP17745098

申请日：1998-06-24

Applicant: ADVANTEST CORP

Inventor： TABUSE KAZUHIKO ,  WATANABE MASAO

IPC: H01J1/14 ,  H01J1/148 ,  H01J1/15 ,  H01J3/02 ,  H01J37/06 ,  H01J37/065

Abstract: PROBLEM TO BE SOLVED: To prolong the service life of an electron gun by arranging a generating member which generates at least one of atoms forming a single crystal molecular structure near a cathode member formed of a single crystal of a molecule consisting of a specified atom. SOLUTION: A cathode member 13 is formed of a single crystal of LaB6, and a polycrystalline body 15 of LaB6 that is a generating member is arranged in the terminal part of the cathode member 13, and a graphite heater 12 is placed facing the cathode member 13 through the polycrystalline body 15. The surface of the body part 15 of a metallic aperture 14 is covered with a protecting film 17 consisting of a boride of a rare earth element having conductivity. When a negative charge is applied to the cathode member 13 having terminal part heated by the graphite heater 12 from the outside, thermoelectrons are released from the tip of the cathode member, and the polycrystalline body 15 is also overheated at this time to generate La atom or B atom. Accordingly, the La atom or B atom separated from the cathode member 13 is replenished with the La atom or B atom generated from the polycrystalline body 15.

公开(公告)号：JPH09169518A

公开(公告)日：1997-06-30

申请号：JP34989195

申请日：1995-12-21

Applicant: NAT INST RES INORGANIC MAT

Inventor： OTANI SHIGEKI ,  SODA RYUTARO ,  ISHIZAWA YOSHIO

IPC: C01B35/04 ,  H01J1/14 ,  H01J1/148 ,  H01J37/06

Abstract: PROBLEM TO BE SOLVED: To obtain an electron emitting material having a long service life and high luminance by using a rare earth metal hexaboride having a compsn. contg. born in excess. SOLUTION: Boron powder is mixed with powder of ReB [where Re is La, Ce or (La+Ce)], this mixture is compacted and the resultant green compact is sintered to obtain a sintered boron-contg. stock rod. This rod is set on the upper shaft of a floating zone growth device through a holder and a sintered rare earth metal hexaboride rod is set on the lower shaft through a holder. The rods are fused by heating, the stock rod is moved upward to form an initial melt zone and the upper and lower shafts are slowly moved downward to obtain the objective rare earth metal hexaboride represented by the formula ReB6-x (where 0.05

公开(公告)号：JPH0311054B2

公开(公告)日：1991-02-15

申请号：JP17341580

申请日：1980-12-09

Applicant: DENKI KAGAKU KOGYO KK ,  SHINGIJUTSU JIGYODAN

Inventor： ISHII MASAJI ,  HAGIWARA HIROTOSHI ,  HIRAOKA HIDEO

IPC: H01J37/06 ,  H01J1/14 ,  H01J1/148 ,  H01J1/16

公开(公告)号：JPS60130023A

公开(公告)日：1985-07-11

申请号：JP23602483

申请日：1983-12-16

Applicant: INOUE JAPAX RES

Inventor： INOUE KIYOSHI

IPC: H01K1/10 ,  H01J1/14 ,  H01J1/148

Abstract: PURPOSE:To obtain an electrode filament with high efficiency by depositing and forming an LaB6 coating layer for a thermion emission material on a matrix metal wire using the discharge coating. method. CONSTITUTION:A surface coating layer 2 made of LaB6 is formed on the surface of a tungusten wire 1 at a thickness below 10 microns using the discharge coating method. The discharge coating uses a method in which while a coating material electrode and a metal wire are being made to touch, separated, oscillated or rotated and slided, discharge is generated between both and the coating material is deposited to a matrix metal wire, a method in which a coating material wire is dissolved and scattered by shock discharge and is made to collide against the matrix metal wire, a method in which coating material powder is jetted by shock discharge and is made to collide against the matrix and is deposited and applied, a method in which shock discharge is performed between the coating material electrodes opposed to the matrix, and such. As a result, the coating layer can be formed on the surface of the matrix metal wire as the LaB6 compound without decomposing the coating material LaB6 and the coating layer that is deposited to the matrix and is coupled tightly can be obtained.

公开(公告)号：JPS5679828A

公开(公告)日：1981-06-30

申请号：JP15691579

申请日：1979-12-05

Applicant: TOKYO SHIBAURA ELECTRIC CO

Inventor： TAKIGAWA TADAHIRO ,  SASAKI ISAO

IPC: H01J1/14 ,  H01J1/148 ,  H01J1/15 ,  H01J1/16 ,  H01J3/02 ,  H01J37/06

Abstract: PURPOSE:To uniformalize the current density of an aperture image, control the spreading by means of the space charge effect of an electron beam, and obtain ample brightness by specifying the half vertical angle of a cathode chip whose tip is machined into a cone or a pyramid. CONSTITUTION:The tip of a cathode chip 101 is machined into a cone or a pyramid and thermoelectrons are taken out from the tip. This cathode chip 101 consists of the materials, for example, LaBb, ZrC, TiC, TaC or those in which impurities are mixed, whose work function is W and whose relationship of temperature Te which renders the vapor pressure of 1X10 Torr is W/Te . The half vertical angle of the cone or the pyramid on the tip of the cathode chip 101 is set to 60 deg.- 85 deg..

公开(公告)号：JPS5528298A

公开(公告)日：1980-02-28

申请号：JP10488379

申请日：1979-08-17

Applicant: COMMISSARIAT ENERGIE ATOMIQUE

Inventor： MISHIERU KONTORE ,  FUIRITSUPU MARUTAN ,  MONIKU KETEIE

IPC: H01J1/14 ,  C04B35/563 ,  C04B35/58 ,  H01J1/148 ,  H01J1/15 ,  H01J3/02

公开(公告)号：JPS5051660A

公开(公告)日：1975-05-08

申请号：JP10020173

申请日：1973-09-07

IPC: C04B35/58 ,  C01B35/04 ,  H01J1/14 ,  H01J1/148 ,  H01J1/304