LAYERED CERAMIC ELECTRONIC PART AND MANUFACTURING METHOD THEREOF

摘要

In a low-permeability coil unit (15) composed of layered low-permeability ceramic green sheets, a first coil (La) and a plenty of holes are formed. On the other hand, in a high-permeability coil unit (16) composed of layered high-permeability ceramic green sheets, a second coil (Lb) and a small number of holes are formed. The first coil (La) and the second coil (Lb) are electrically connected in series and constitute a spiral coil (L). The coil unit (16) having the small number of holes and made of ferrite ceramics has a high permeability and a high dielectric constant while the coil unit (15) having the plenty of holes and made of ferrite ceramics has a low permeability and a low dielectric constant.