US 12,001,169 B2
Watch component, watch movement and watch
Takeo Funakawa, Chino (JP)
Assigned to SEIKO EPSON CORPORATION, (JP)
Filed by Seiko Epson Corporation, Tokyo (JP)
Filed on Jul. 15, 2020, as Appl. No. 16/929,212.
Claims priority of application No. 2019-131022 (JP), filed on Jul. 16, 2019.
Prior Publication US 2021/0018875 A1, Jan. 21, 2021
Int. Cl. G04B 45/02 (2006.01); G04B 1/16 (2006.01); G04B 13/02 (2006.01); G04B 17/06 (2006.01); G04B 17/32 (2006.01)
CPC G04B 17/32 (2013.01) [G04B 1/16 (2013.01); G04B 13/02 (2013.01); G04B 17/063 (2013.01); G04B 45/02 (2013.01)] 2 Claims
OG exemplary drawing
 
1. A watch component, comprising:
a substrate containing silicon as a main component; and
a light reflecting layer including a first silicon oxide layer, a silicon layer, and a second silicon oxide layer that are stacked, in this order, at the substrate,
wherein when the light reflecting layer is viewed in plan view, the light reflecting layer includes a first region and a second region,
a thickness of the silicon layer in the first region is different from a thickness of the silicon layer in the second region,
the silicon layer is sandwiched by the first and second silicon oxide layers in the first region and the second region, and
the watch component is an escape wheel and pinion, a rim portion of the escape wheel and pinion includes the first region and the second region, and at least a character or a mark is displayed by one of the first region and the second region.