Diamond surfaces
US6284556A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Jul 8, 1999 |
| Grant date | Sep 4, 2001 |
| Priority date | — |
| Expiry date | Jul 8, 2019 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH01J2201/3165
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A diamond grit surface is formed on a substrate (1) having a metal surface (2), such as nickel, by applying a paste (4) of low-grade diamond grit in a binder to the surface. After driving off the binder, the diamond coated surface is placed in a reactor chamber (10) having a microwave plasma reactor (11) and connected to a hydrogen gas pump (12). The substrate (1) is heated in the hydrogen atmosphere at a reduced pressure. The metal surface (2) acts as a catalyst in the presence of the hydrogen plasma to cause regrowth of the diamond (6), giving an improved size, shape and adhesion. The method may be used to make diamond surfaces in electron emitter devices, circuit boards or abrasive devices.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.