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US 10,520,893 B2Granted
Decorative article and timepiece
AssigneeSeiko Epson Corporation
InventorsYuzuru Tsukamoto, Atsushi Kawakami
Life of this patent
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Abstract
A decorative article has a substrate of which at least part of the surface is configured with Ti or stainless steel; and a coating made of primarily TiC and disposed on the substrate. The coating has at least a first region, and a second region disposed closer to the substrate than the first region. The elastic modulus of the second region is greater than the elastic modulus of the first region.
Claims14
An external part of a timepiece, comprising:
- a substrate that includes Ti or stainless steel;
- and
- a coating disposed on the substrate,
- wherein the coating includes an outermost layer formed primarily of TiC defining an external surface, and an interior layer formed primarily of TiC positioned between the substrate and the outermost layer, and
- an elastic modulus of the interior layer is greater than the elastic modulus of the outermost layer.
2 more elements
Dependencies are inferred from the claim text.