Field emission device having dielectric focusing layers
AssigneeMotorola, Inc.
InventorsChenggang Xie, John Song, Sung P. Pack
Life of this patent
Estimating the term…
Abstract
A field emission device (110, 210, 310, 410) includes an electron emitter (124), a first dielectric focusing layer (122) defining a first aperture (127), and a second dielectric focusing layer (123) defining a second aperture (133). Second dielectric focusing layer (123) is disposed on first dielectric focusing layer (122). The dielectric constant of second dielectric focusing layer (123) is less than the dielectric constant of first dielectric focusing layer (122). During the operation of field emission device (110, 210, 310), electron emitter (124) emits an electron beam (134), which is focused as it travels through first aperture (127) and then through second aperture (133).
Claims27
A field emission device comprising:
- an electron emitter designed to emit an electron beam;
- a first dielectric focusing layer defining a first aperture and characterized by a first dielectric constant, wherein the first aperture is disposed to allow passage therethrough of the electron beam;
- and
- a second dielectric focusing layer defining a second aperture and characterized by a second dielectric constant, wherein the second dielectric focusing layer is disposed over the first dielectric focusing layer, wherein the second aperture is disposed to allow passage therethrough of the electron beam, and wherein the second dielectric constant is less than the first dielectric constant.
A field emission device comprising:
- an electron emitter designed to emit an electron beam;
- a first dielectric focusing layer defining a first aperture and characterized by a first dielectric constant;
- and
- a second dielectric focusing layer defining a second aperture and characterized by a second dielectric constant, wherein the first aperture and the second aperture are disposed to allow passage therethrough of the electron beam in a direction from the first aperture to the second aperture, and wherein the second dielectric constant is less than the first dielectric constant.
A field emission device comprising:
- an electron emitter designed to emit an electron beam;
- a first dielectric focusing layer defining a first aperture and characterized by a first dielectric constant;
- and
- a second dielectric focusing layer defining a second aperture and characterized by a second dielectric constant, wherein the second dielectric focusing layer is disposed on the first dielectric focusing layer, wherein the first aperture and the second aperture are disposed to allow passage therethrough of the electron beam in a direction from the first aperture to the second aperture, and wherein the second dielectric constant is less than the first dielectric constant.
Dependencies are inferred from the claim text.