Method for coating foil comprised of nickel or nickel alloy
US6436546B1 · kind B1 · utility
Assignees
Inventors
Key dates
| Filing date | Jun 30, 2000 |
| Grant date | Aug 20, 2002 |
| Priority date | — |
| Expiry date | Jun 30, 2020 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T428/2495
- WIPO fieldSurface technology, coating
- WIPO sectorChemistry
Abstract
The invention discloses a method for coating foil comprised of nickel or a nickel alloy by sputtering a layer comprised of a metal compound on the foil in a vacuum. The foil is treated in an argon plasma with a pressure of 1031 3 to 10−2 millibar, for a variable time with a variable rate, and with energy of the plasma ions. A chromium oxide layer or a layer containing chromium oxide is successively sputtered by means of a reactive magnetron atomizing of at least one target comprised of chromium or an alloy containing chromium. The layer is sputtered with at least one atomization source in an argon-oxygen mixture with a pressure of 10−3 to 10−2 millibar. The operating point is constantly maintained in given boundaries and the foil is bonded in a defined thermal contact with a thermal buffer when the foil is being coated. The foil is coated until a given interference color pertaining to an interference of a first or second order is reached on the foil.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.