公开(公告)号：US20210091607A1

公开(公告)日：2021-03-25

申请号：US17022918

申请日：2020-09-16

Applicant: Seiko Instruments Inc.

Inventor： Kosuke YAMAMOTO ,  Shinji KINOSHITA ,  Hitoshi TAKEUCHI ,  Tatsuya OMURA

IPC: H02K1/14 ,  G04C3/14 ,  H02K37/16 ,  H02K15/02

Abstract: A stator includes a magnetic plate material that has a main plate surface that is a surface to face a main plate of a movement when assembled to the main plate and that has a rotor accommodating hole formed in a part thereof; and a non-magnetic region that is made non-magnetic by applying chromium on the main plate surface around the rotor accommodating hole and irradiating the chromium with a laser from the main plate surface side.