Patent · US Expired

Field emission device having dielectric focusing layers

US6204597A · kind A · utility

36Cited by

6References

27Claims

0Family size

Assignee

Motorola, Inc. · US

Inventors

Chenggang Xie · Cedar Park, US
John Song · Nashville, US
Sung P. Pack · Tempe, US

Key dates

Filing date	Feb 5, 1999
Grant date	Mar 20, 2001
Priority date	—
Expiry date	Feb 5, 2019

Classification

Technology area (CPC H)Electricity
CPC primaryH01J3/022
WIPO fieldElectrical machinery, apparatus, energy
WIPO sectorElectrical engineering

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).

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.