Patent ID: 7397335

Claim:
A multilayered-type inductance device comprising: a ring-shaped coil having an n winding section in which the number of windings is n, and an n+1 winding section in which the number of windings is one more than in the n winding section, a soft magnetic ceramic member embedding the ring-shaped coil, the soft magnetic ceramic member and the ring-shaped coil being layered into the device, wherein the soft magnetic ceramic member is mounted to at least partially surround the ring-shaped coil, an area of the n winding section or of the n+1 winding section is exposed outside of the soft magnetic ceramic member, and the soft magnetic ceramic member is a magnetic circuit material to form a magnetic circuit for passing a magnetic flux, said device having a magnetic gap between the soft magnetic ceramic member and only one of the n winding section or the n+1 winding section, to block either a portion of the magnetic flux formed around the n winding section or a portion of the magnetic flux formed around the n+1 winding section.