Timepiece dial, method of manufacturing a timepiece dial, and a timepiece
AssigneeSeiko Epson Corporation
InventorKoki Takasawa
Life of this patent
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Abstract
A timepiece dial has excellent transparency to electromagnetic waves (radio and light), and an excellent appearance, a timepiece dial manufacturing method enables manufacturing the timepiece dial, and a timepiece has the timepiece dial. The timepiece dial 1 has a substrate 2 that is electromagnetically transparent, and a dispersion film 3 containing a dispersion of metal powder 31 with an average particle diameter of 5 μm≦20 μm and an average particle thickness of 30 nm≦50 nm. The average thickness of the dispersion film 3 is 0.5 μm≦3.0 μm. The metal powder 31 is disposed with a specific gap therebetween in the through-thickness direction of the dispersion film 3.
Claims15
A timepiece dial comprising:
- a substrate that is electromagnetically transparent;
- and
- a dispersion film in which metal powder with an average particle diameter of 5 μm≦20 μm and an average particle thickness of 30 nm≦50 nm is dispersed,
- the average thickness of the dispersion film is 0.5 μm≦3.0 μm, and
- the metal powder is disposed with a specific gap therebetween in the through-thickness direction of the dispersion film.
A timepiece dial manufacturing method comprising:
- a substrate preparation process that prepares a substrate that is electromagnetically transparent;
- and
- a dispersion application process that applies to the substrate a dispersion in which metal powder with an average particle diameter of 5 μm≦20 μm and an average particle thickness of 30 nm≦50 nm is dispersed, and
- forms on the substrate a dispersion film with an average thickness of 0.5 μm≦3.0 μm in which the metal powder is disposed with a specific gap therebetween in the through-thickness direction.
Dependencies are inferred from the claim text.