A stepping motor being a motor used in oil includes a coil formed with a conductor
coated with an outer coating and wound around a bobbin, and coil terminals electrically
connected to the conductor at ends thereof led out from the coil, the outer coating
being removed from the conductor at the ends thereof. The coil terminals are coated
with a protective film made of a material having low permeability to elemental
sulfur and sulfur compounds. Therefore, coil terminals and ends of the conductor
are prevented from erosion by sulfur and organic sulfur compounds, thereby reducing
risk of disconnection in the coil terminals and the conductor.
