TAPERED FERRITE CORE, METHOD AND DEVICE FOR MANUFACTURING SAME, AND INDUCTANCE ELEMENT IN WHICH SAME IS USED

摘要

A tapered ferrite core having a solid or hollow cylindrical shape with larger length than outer diameter, and comprising a ground taper portion in at least one end portion, the taper portion having ground streaks extending in the longitudinal direction of the ferrite core, can be formed by centerless-grinding a rotating ferrite core by a rotating grinder.