Stainless steel coated with thin film of carbon containing specified amount in a state of diamond and having an adjustable black transparent color tone
Abstract
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 μm 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 μm and containing 10 to 75 wt % of carbon existing in a state of diamond.
Inventors
- 👤 Wataru Ito
- 👤 Satoshi Ito
Bibliographic Details
Claims Analysis
Total Claims: 10References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1992-06-26 | 1992-12-26 | 1993-06-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1996-06-26 | 1996-12-26 | 1997-06-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2000-06-26 | 2000-12-26 | 2001-06-27 | $7700.00 | Window Closed / Lapsed |