Process for manufacturing a ceramic element for a watch case and element obtained by this process
AssigneeRolex SA
InventorEric Grippo
Life of this patent
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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 (2) 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 (3) 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 (4) 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 (2) is dissolved.
Claims20
A ceramic element to be fitted onto a watch case, a visible surface of which has features, wherein said visible surface is a watch surface exposed to being knocked,
- wherein these features are fixed to this surface via a first Ti, Ta, Cr or Th tie layer at least 100 nm in thickness, covered by at least one second layer of the group comprising Au, Ag, CrN, Ni, Pt, TiN, ZrN, Pd or alloys thereof, with a thickness of at least 100 nm.
Dependencies are inferred from the claim text.