Ground plane insulating coating for proximity focused devices
US5780961A · kind A · utility
1Cited by
9References
20Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Mar 5, 1993 |
| Grant date | Jul 14, 1998 |
| Priority date | — |
| Expiry date | Mar 5, 2013 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH01J31/507
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A thin layer of alumina (aluminum oxide) is coated onto the ground plane of a microchannel plate (MCP) without covering the pores of the MCP so it does not effect the performance. The coating is sputtered onto the ground plane at a very steep angle. The addition of the thin dielectric coating of alumina greatly improves the spatial resolution of proximity focused image intensifiers using a narrow gap between the phosphor screen and the MCP. With the coating on the ground plane and the same gap the phosphor screen can be ran at 9000 volts, as compared to 3 kV without the coating.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.