Magnetic device, method for manufacturing the same and power supply module equipped with the same

摘要

A magnetic device includes a sheet-type coil (1) including a planar conductive coil (2) and an insulating substance (3); and a sheet-type first magnetic member (4) disposed on at least one of upper and lower surfaces of the sheet-type coil (1), where a magnetic permeability of the insulating substance (3) is smaller than a magnetic permeability of the first magnetic member (4). The magnetic device preferably includes a second magnetic member provided at a predetermined area of the sheet-type coil (1), the second magnetic member being made of a resin containing a magnetic powder and having a permeability larger than the insulating substance (3) and smaller than the first magnetic member (4). The predetermined area is at least one position selected from a center portion and a peripheral portion of the sheet-type coil (1) where a conductor constituting the planar conductive coil (2) is not present. Further, a power supply module of the present invention includes the magnetic device according to the present invention.