Micromechanical component, particularly a timepiece wheel, particularly an escapement wheel, the surface of which is optimised
AssigneeETA SA Manufacture Horlogere Suisse
InventorsSerge Nicoud, Samuel Vignier, Sébastien Roder, Jean-Luc Helfer, Christian Charbon, Frédéric Kohler
Life of this patent
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Abstract
Micromechanical component, particularly a timepiece wheel, particularly an escapement wheel, including a substrate with a first material including at least nickel and phosphorus, which substrate is covered, on at least one surface of the substrate of the wheel, by a coating of a second material including at least nickel and poorer in phosphorus than the first material, or devoid of phosphorus, and the second material constitutes the peripheral layer of the wheel at this at least one surface of the substrate.
Claims18
A timepiece wheel, comprising:
- a substrate in a first material comprising nickel and phosphorus,
- wherein the substrate is covered, on at least one surface of the substrate of the wheel, by a coating of a second material comprising nickel and poorer in phosphorus than the first material, or devoid of phosphorus,
- the second material constitutes a peripheral layer of the wheel at the at least one surface of the substrate, and
- the second material has a thickness of less than 0.2 micrometres.
Dependencies are inferred from the claim text.