Patent ID: 7905008
Filing Date: 2011-03-15
Classification: H01F,H03H,Y10T

Abstract:
1. A method of manufacturing a coil component, comprising the steps of: forming a first insulation layer on a first magnetic substrate formed of a magnetic material; forming an insulation film which forms a part of a second insulation layer on the first insulation layer; forming a coil conductor on the insulation film in a spiral configuration; forming a second insulation film which forms another part of the second insulation layer on the coil conductor; forming an open region on an inner circumference side and on an outer circumference side of the coil conductor to expose the first insulation layer; forming a magnetic layer at least in the open region on the first insulation layer over the first magnetic substrate so that the first insulation layer prevents the magnetic layer from contacting the first magnetic substrate; securing a second magnetic substrate formed of a magnetic material on the magnetic layer; and forming a plurality of electrode terminals, wherein one of the plurality of electrode terminals is connected to a terminal portion of the coil conductor, and the plurality of electrode terminals are provided across sides of the first and second magnetic substrates, and the first insulation layer prevents shorting failures between the plurality of electrode terminals, wherein the first insulation layer has a thickness less than or equal to 20 microns.