Electron beam source formed with biologically derived tubule materials
US5089742A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Sep 28, 1990 |
| Grant date | Feb 18, 1992 |
| Priority date | — |
| Expiry date | Sep 28, 2010 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH01J1/3042
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A field emitter array comprises an array of aligned metallic, conductive rotubules extending from a conductive base. The array is typically made by cutting a matrix comprising the aligned microtubules into sections, usually normal to the tubule alignment axis. One end surface of a section is etched or otherwise treated to remove the matrix, but not the tubules. That end surface is then provided with a conductive coating and fixed to a contact. The other end surface of that section is then also treated to remove the matrix material and leave the tubules extending from the conductive metal base. Field emitter arrays made according to the present invention provide a greater brightness than conventional field emitter arrays.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.