Process for manufacturing a ceramic element for a watch case and element obtained by this process
US7628894B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Feb 18, 2005 |
| Grant date | Dec 8, 2009 |
| Priority date | — |
| Expiry date | Jul 31, 2025 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T428/31678
- WIPO fieldMaterials, metallurgy
- WIPO sectorChemistry
Abstract
According to this process for manufacturing a ceramic element intended to be fitted onto a watch case, the visible surface of which has features, a soluble layer is selectively deposited on said visible surface, the thickness of said soluble layer being at least equal to the height of said features, a first tie layer of the Ti, Ta, Cr or Th type is vacuum-deposited by magnetron sputtering with a thickness of at least 100 nm by physical vapor deposition (PVD) on said surface thus selectively coated, followed, without venting atmosphere, by PVD deposition of said second layer made of Au, Pt, Ag, Ni, Pd, TiN, CrN, ZrN or alloys thereof with a thickness of at least 100 nm, and then said soluble layer is dissolved.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.