Field emission cathodes having an emitting layer comprised of electron emitting particles and insulating particles
US6342755B1 · kind B1 · utility
Assignees
Inventors
Key dates
| Filing date | Aug 11, 1999 |
| Grant date | Jan 29, 2002 |
| Priority date | — |
| Expiry date | Aug 11, 2019 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH01J2201/30403
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
Electrophoretic deposition provides an efficient process for manufacturing a field emission cathode. Particles of an electron emitting material mixed with particles of an insulating material are deposited by electrophoretic deposition on a conducting layer overlying an insulating layer to produce the cathode. By controlling the composition of the deposition bath and by mixing insulating particles with emitting particles, an electrophoretic deposition process can be used to efficiently produce field emission cathodes that provide spatially and temporally stable field emission. The deposition bath for the field emission cathode includes an alcohol, a charging salt, water, and a dispersant. The field emission cathodes can be used as an electron source in a field emission display device.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.