Stainless steel coated with thin film of carbon containing specified amount in a state of diamond and having an adjustable black transparent color tone
US4842945A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | May 26, 1987 |
| Grant date | Jun 27, 1989 |
| Priority date | — |
| Expiry date | May 26, 2007 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T428/31678
- WIPO fieldSurface technology, coating
- WIPO sectorChemistry
Abstract
A stainless steel with black transparent appearance suitable for use as a decorative architectural material. The stainless steel material has a stainless steel substrate and a thin graphite film formed on the substrate, the thin graphite film having a thickness not greater than 1 .mu.m and containing 10 to 75 wt % of carbon existing in a state of diamond. This stainless steel material is produced by chemical vapor deposition process making use of a capacitance-coupled type high-frequency plasma, having the steps of preparing a stainless steel material as a substrate; placing the substrate in an atmosphere of a mixture gas which contains both hydrogen gas and an inert gas together with a hydrocarbon gas; and causing a reaction by applying a D.C. voltage of 100 to 600 V using the substrate as a cathode; thereby forming, on the substrate, a thin graphite film having a thickness not greater than 1 .mu.m and containing 10 to 75 wt % of carbon existing in a state of diamond.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.