公开(公告)号：AU7907701A

公开(公告)日：2002-04-22

申请号：AU7907701

申请日：2001-07-30

Applicant: EXTREME DEVICES INC

Inventor： JAMISON KEITH D ,  PATTERSON DONALD E ,  HONG CHARLIE ,  SCHUELLER RANDOLPH D ,  HEBERT DAVID F ,  WOODIN RICHARD L

IPC: H01J3/02 ,  H01J9/02

公开(公告)号：CA2396164A1

公开(公告)日：2001-07-12

申请号：CA2396164

申请日：2000-12-28

Applicant: EXTREME DEVICES INC

Inventor： JAMISON KEITH D ,  PATTERSON DONALD E

IPC: H01J29/04 ,  H01J1/304 ,  H01J3/02 ,  H01J29/48

Abstract: A field emission cathode providing for dynamic adjustment of beam shape is disclosed. Beam shape adjustment is accomplished by segmenting the gate electrode (17) of a gated field emission cathode and independently driving t he various gate segments to form the desired beam shape. Segments can be turned on and off as the beam is deflected allowing the dynamic correction of aberrations in the beam. A focus lens (32) can be placed on the gated cathod e to produce a parallel electron beam. In addition, a hollow cathode can be produced to minimize space charge repulsion in a beam.

公开(公告)号：AU4560701A

公开(公告)日：2001-10-08

申请号：AU4560701

申请日：2001-03-12

Applicant: EXTREME DEVICES INC

Inventor： KLOBA ANTHONY A ,  SCHUELLER RANDOLPH D ,  DELGUZZI DAVID A ,  PATTERSON DONALD E ,  JAMISON KEITH D ,  KALAR KENT R

IPC: H01J3/02 ,  H01J9/18 ,  H01J29/04 ,  H01J29/48

Abstract: Apparatus and method for mounting a field emission device having emitters and an extraction grid in an electron gun are provided. The apparatus may be adapted from parts of a conventional electron gun that uses a thermionic emitter. Electrical connection to the grid is provided by bumps that are spring-loaded against a conducting surface, such as the second grid of a conventional electron gun.

公开(公告)号：AU2461901A

公开(公告)日：2001-07-16

申请号：AU2461901

申请日：2000-12-28

Applicant: EXTREME DEVICES INC

Inventor： JAMISON KEITH D ,  PATTERSON DONALD E

IPC: H01J29/04 ,  H01J1/304 ,  H01J3/02 ,  H01J29/48

Abstract: A field emission cathode providing for dynamic adjustment of beam shape is disclosed. Beam shape adjustment is accomplished by segmenting the gate electrode of a gated field emission cathode and independently driving the various gate segments to form the desired beam shape. Segments can be turned on and off as the beam is deflected allowing dynamic correction of aberrations in the beam. A focus lens can be placed on the gated cathode to produce a parallel electron beam. In addition, a hollow cathode can be produced to minimize space charge repulsion in a beam.

公开(公告)号：AU7855200A

公开(公告)日：2002-04-15

申请号：AU7855200

申请日：2000-10-04

Applicant: EXTREME DEVICES INC

Inventor： PATTERSON DONALD E ,  JAMISON KEITH D

IPC: C23C16/01 ,  C23C16/26 ,  H01J1/304 ,  H01J3/02 ,  H01J9/02 ,  H01J23/16 ,  H01J25/38

公开(公告)号：AU7753000A

公开(公告)日：2002-04-15

申请号：AU7753000

申请日：2000-10-04

Applicant: EXTREME DEVICES INC

Inventor： PATTERSON DONALD E ,  JAMISON KEITH D

IPC: H01J1/304 ,  H01J9/02 ,  H01J29/04 ,  H01J29/48

Abstract: An electron field emission device is provided by placing a substrate in a reactor, heating the substrate and supplying a mixture of hydrogen and a carbon-containing gas at a concentration of about 8 to 13 per cent to the reactor while supplying energy to the mixture of gases near the substrate for a time to grow a first layer of carbon-based material to a thickness greater than about 0.5 micrometers, subsequently reducing the concentration of the carbon-containing gas and continuing to grow a second layer of carbon-based material, the second layer being much thicker than the first layer. The substrate is subsequently removed from the first layer and an electrode is applied to the second layer. The device is free-standing and can be used as a cold cathode in a variety of electronic devices such as cathode ray tubes, amplifiers and traveling wave tubes. The surface of the substrate may be patterned before growth of the first layer to produce a patterned surface on the field emission device.