Patent ID: 11868089
Assignee: SEIKO EPSON CORPORATION
Field: Measurement (Instruments)
Classification: CPC G | IPC G

Claim 0:
1. A watch component that constitutes a drive mechanism of a watch, the watch component comprising:
a tooth portion; and
a base mainly composed of silicon,
wherein the tooth portion and the base each include an upper surface and an opposite lower surface, and a contact surface extends in a thickness direction between the upper surface and the opposite lower surface,
the contact surface is where the tooth portion makes contact with another component, and includes a recess having a maximum depth of 0.02 μm to 1.20 μm in cross-sectional view,
a maximum depth position of the recess is located at a center portion of the contact surface in the thickness direction of the base or the tooth portion, and
the recess is defined by a first angled planar surface that extends from the upper surface to the center portion and an angled second planar surface that extends from the center portion to the opposite lower surface.