中科微点-全球专利检索

  1. Login
  2. Sign Up

Search Results

13 records (took 0.017 seconds)

    Thermionic cathode for electron beam apparatus
    1.
    发明授权
    Thermionic cathode for electron beam apparatus 失效
    电子束设备的THERMIONIC CATHODE

    公开(公告)号：US3631290A

    公开(公告)日：1971-12-28

    申请号：US3631290D

    申请日：1970-08-17

    Applicant: IBM

    Inventor： LOEFFLER KARL H

    IPC: H01J1/15 ,  H01J3/02 ,  H01J1/14 ,  H01J19/08

    CPC classification number: H01J1/15 ,  H01J3/026 ,  H01J3/027

    Abstract: A thermionic cathode comprising a lanthanum hexaboride (LaB6) emitter and an emission current-intercepting plate made of rhenium containing an aperture disposed adjacent the emitter. The separation between the emitter and plate is set as small as possible without physical contact between them, typically 0.1 mm. The beam emitted through the aperture has high brightness and low energy spread. To prevent corrosion of the emitter it is housed in a cavity which is exposed to the vacuum of the apparatus only through the aperture.

    INK JET NOZZLE STRUCTURE AND METHOD OF MAKING
    5.
    发明专利
    INK JET NOZZLE STRUCTURE AND METHOD OF MAKING 未知

    公开(公告)号：CA1059197A

    公开(公告)日：1979-07-24

    申请号：CA238134

    申请日：1975-10-20

    Applicant: IBM

    Inventor： CHIOU CHARLES ,  GALLI GUIDO ,  LOEFFLER KARL H ,  LORENZ MAX R

    IPC: B05B1/02 ,  B26F1/26 ,  B41J2/16 ,  G01D15/18 ,  H04N1/034 ,  G01D15/16 ,  B41J3/04

    Abstract: INK JET NOZZLE STRUCTURE AND METHOD OF MAKING A nozzle array structure for pressurized fluid jets includes a uniform deposited membrane having an array of uniform small orifices therein overlaying a planar substrate having an array of larger aperture openings therethrough with approximately the same central axes as the orifice array. The method of making includes forming a substrate of a planar single crystal material oriented with the (100) planes parallel to the surface. A membrane comprising a uniform coating of an inorganic material is applied to the planar surface of the substrate. The substrate is preferentially etched from the rear surface to form an array of openings therein extending therethrough to the membrane. The membrane is then selectively eroded to form an array of uniform small orifices therein.

    6.
    发明专利
    未知

    公开(公告)号：DE2554085A1

    公开(公告)日：1976-07-15

    申请号：DE2554085

    申请日：1975-12-02

    Applicant: IBM

    Inventor： CHIOU CHARLES ,  GALLI GUIDO ,  LOEFFLER KARL H ,  LORENZ MAX RUDOLPH

    IPC: B05B1/02 ,  B26F1/26 ,  B41J2/16 ,  G01D15/18 ,  H04N1/034 ,  B41J3/04

    Abstract: 1493667 Ink jets INTERNATIONAL BUSINESS MACHINES CORP 27 Oct 1975 [31 Dec 1974] 43996/75 Heading B6P A nozzle structure for an ink jet includes a monocrystalline semi-conducting substrate 20 with an array of passages 21 (only one shown), and a layer 22 of uniform thickness overlying the substrate with orifices 23, each passage 21 is associated with an orifice 23 and their central axes are aligned. As shown a silicon substrate 20 receives a layer 22 (silicon dioxide or nitride) by vapour deposition, sputtering or thermal oxide growth. In step C a mask 35 is applied to control the anisotropic etching to produce passage 21 (step D). The orifice 23 can be produced by chemical/ sputter/ion/plasma etch through a mask 36.

    8.
    发明专利
    未知

    公开(公告)号：FR2305019A1

    公开(公告)日：1976-10-15

    申请号：FR7602501

    申请日：1976-01-27

    Applicant: IBM

    Inventor： LOEFFLER KARL H ,  PFEIFFE HANS C

    IPC: H01J37/09 ,  H01J37/141 ,  H01J37/147 ,  H01J37/30 ,  H01L21/027 ,  H01L21/70

    Abstract: A shielded magnetic lens and deflection yoke structure for an electron beam column which minimizes aberrations in the lens system caused by winding asymmetry in the field coil, as well as aberrations due to eddy currents created within the magnetic circuit of the lens by interaction with the field of the deflection yoke. The shield includes a polepiece structure for the magnetic electron lens generally comprising a hollow cylinder formed of a plurality of precisely machined magnetic discs stacked concentrically with precisely machined nonmagnetic discs in alternating sequence with the lens coil positioned adjacent the periphery of the cylinder and the deflection yoke positioned within the cylinder or proximate to either end thereof. In one preferred embodiment of the invention the magnetic discs are formed of a nonconductive material such as ferrite and the nonmagnetic discs are formed of alumina.

Patent Agency Ranking