US 11,988,996 B2
Timepiece component and timepiece
Takenori Sawai, Shiojiri (JP)
Assigned to SEIKO EPSON CORPORATION, (JP)
Filed by Seiko Epson Corporation, Tokyo (JP)
Filed on Jun. 9, 2022, as Appl. No. 17/836,010.
Claims priority of application No. 2021-097137 (JP), filed on Jun. 10, 2021.
Prior Publication US 2022/0397865 A1, Dec. 15, 2022
Int. Cl. G04B 37/22 (2006.01)
CPC G04B 37/223 (2013.01) 4 Claims
OG exemplary drawing
 
1. A timepiece component comprising:
a base member;
a first layer provided at the base member; and
a second layer provided at the first layer, wherein the second layer has lower hardness than the first layer, and the first layer is formed of either TaN or ZrN,
wherein the second layer is an oxide film formed by removing nitrogen (N) from the first layer such that the second layer includes either TaO or ZrO, and includes N—O; and
a peak value of an N1s spectrum of the second layer is equal to or less than a peak value of a N—O spectrum in X-ray photoelectron spectroscopy.