Watch component, watch movement and watch
AssigneeSeiko Epson Corporation
InventorKazuyuki Miyashita
Life of this patent
Estimating the term…
Abstract
For example, an escape gear wheel part as a watch component includes a base member including a first surface and a second surface opposite the first surface, the base member being mainly composed of silicon, and a light reflecting layer provided at the first surface of the base member, the light reflecting layer having a three-layer structure in which a first silicon oxide layer, a silicon layer, and a second silicon oxide layer are layered in this order.
Claims20
A watch component configured for use in a watch, the watch component comprising:
- a base member including a first surface and a second surface opposite the first surface, the base member being mainly composed of silicon and being shaped as the watch component;
- and
- a light reflecting layer provided at the first surface of the base member, the light reflecting layer having a three-layer structure in which a first silicon oxide layer, a silicon layer, and a second silicon oxide layer are layered in this order,
- wherein a maximum reflectance for light having a wavelength in a range from 400 nm to 780 nm, when the light is incident on the light reflecting layer at an incident angle of 0°, is 50% or greater.
A method for manufacturing a watch component, the method comprising forming a light reflecting layer at a first surface of a base member including the first surface and a second surface opposite the first surface, the base member being mainly composed of silicon, the light reflecting layer having a three-layer structure in which a first silicon oxide layer, a silicon layer, and a second silicon oxide layer are layered in this order.
A watch component configured for use in a watch, the watch component comprising:
- a base member including a first surface and a second surface opposite the first surface, the base member being mainly composed of silicon and being shaped as the watch component;
- and
- a light reflecting layer provided at the first surface of the base member, the light reflecting layer having a three-layer structure in which a first silicon oxide layer, a silicon layer, and a second silicon oxide layer are layered in this order,
- wherein an average thickness of the silicon layer is from 66 nm to 86 nm.
Dependencies are inferred from the claim text.