An integrated magnetic core is provided. The integrated magnetic core includes a first plate and a second plate. The first plate includes a plurality of legs extending outwardly from a first surface of the first plate. The plurality of legs includes first and second oppositely disposed legs and third and fourth oppositely disposed legs. The second plate is coupled to at least the third and fourth legs of the first plate.

A coil component 1 includes a base body 10 having a mounting surface 10b, a coil conductor 25 wound around a coil axis X through a plurality of layers in the base body 10, where the coil conductor 25 has a first end 25a and a second end 25b, external electrodes 21 and 22 provided on the mounting surface 10b, a lead-out conductor 26 connecting the first end 25a of the coil conductor 25 and the external electrode 21, and a lead-out conductor 27 connecting the second end 25b of the coil conductor 25 and the external electrode 22. At least a portion of the lead-out conductor 26 is positioned within a first region R1 inside the coil conductor 25 in a radial direction when seen in a direction of the coil axis X.

A method of manufacturing a coil component includes arranging a plurality of coil conductors that is a wound body of a conductive wire, and each has opposing first and second surfaces, in a winding axis direction on a surface of an adhesive layer in contact with the first surface, manufacturing a processed body by placing a first magnetic sheet including a first metal magnetic particle and a first resin on a side of the second surface of each of the coil conductors and performing press processing on the first magnetic sheet, manufacturing an aggregate base body by peeling the processed body from the adhesive layer, placing a second magnetic sheet including a second metal magnetic particle and a second resin on a side of the first surface of each coil conductor, and press processing the second magnetic sheet, and manufacturing a body by individualizing the aggregate base body.

A method for manufacturing a laminated iron core including placing a laminated iron core body on a conveyance jig. Downwardly moving the conveyance jig by a lift and downwardly moving an upper die with respect to a lower die of the die unit. The lift being mounted so as to be unaffixed to both the die unit and the conveyance jig. Holding the laminated iron core body placed on the conveyance jig from both sides in a lamination direction of the plurality of iron core pieces between the lower die and the upper die, the lower die coming into contact with the conveyance jig. Injecting a resin into a through hole formed through the laminated iron core body held by the die unit in the lamination direction of the plurality of iron core pieces from the lower die through the conveyance jig or from the upper die.

A laminated core includes: a plurality of electrical steel sheets stacked in a thickness direction, wherein the electrical steel sheet includes an annular core back part and a plurality of tooth parts protruding from the core back part toward a radial direction and arranged at intervals in a circumferential direction of the core back part, and wherein among the plurality of electrical steel sheets, the tooth parts of the electrical steel sheets located at one side on the outside in a stacking direction are adhered to each other by an adhesion part provided between the tooth parts adjacent to each other in the stacking direction, the tooth parts of the electrical steel sheets located at the other side on the outside in the stacking direction are adhered to each other by an adhesion part provided between the tooth parts adjacent to each other in the stacking direction, and the tooth parts of the electrical steel sheets located at a center part in the stacking direction are not adhered to each other.

A laminated core includes a plurality of electrical steel sheets stacked on each other, and an adhesion part which is provided between the electrical steel sheets adjacent to each other in a stacking direction and adheres the electrical steel sheets to each other, in which the electrical steel sheet include an annular core back part, and a plurality of tooth parts which extend from the core back part in a radial direction of the core back part and are disposed at intervals in a circumferential direction of the core back part, an adhesion region in which the adhesion part is provided is formed in the core back part of the electrical steel sheet, and the adhesion region extends in a direction along a magnetic flux passing through a region of the electrical steel sheet in contact with the adhesion region.

A laminated core includes a plurality of electrical steel sheets which are stacked on each other and of each of which both surfaces are coated with an insulation coating; and an adhesion part which is provided between the electrical steel sheets adjacent in the stacking direction and adheres the electrical steel sheets to each other, wherein an adhesive for forming the adhesion part includes a first phase and a second phase, wherein the adhesion part has a sea-island structure of the first phase which is a sea structure portion and the second phase which is an island structure portion, wherein the first phase contains an epoxy resin, an acrylic resin, and a curing agent, wherein the first phase has an SP value of 8.5 to 10.7 (cal/cm.sup.3).sup.1/2, wherein the second phase contains an elastomer, and wherein the second phase has an SP value of 7.5 to 8.4 (cal/cm.sup.3).sup.1/2.

A method for producing a magnetic core includes a processing step of giving a desired shape to a strip made of an alloy composition, a heat-treating step of forming bcc-Fe crystals, and then a stacking step of obtaining a magnetic core having a shape. Here, the alloy composition is Fe—B—Si—P—Cu—C and has an amorphous phase as a primary phase. In the heat-treating step, the strip is heated up to a temperature higher than a crystallization temperature of the alloy composition at a high heating rate.

A coil component includes a magnetic section containing a resin material and a filler component containing a magnetic metal, a coil conductor embedded in the magnetic section, and outer plating electrodes electrically connected to the coil conductor. At least one end portion of the magnetic section has a concave indentation. The surface of the indentation is overlaid with a hydrophobic insulating film. The surface of the magnetic section except for the indentation and extended end surfaces of the coil conductor are overlaid with an insulating protective film. The magnetic section, the coil conductor, and the protective film form a component body. The outer electrodes are placed on both end portions of the component body that exclude the indentation.

A laminated core includes a plurality of electrical steel sheets stacked on each other and coated with an insulation coating on both surfaces thereof, and an adhesion part provided between the electrical steel sheets adjacent to each other in a stacking direction and configured to adhere the electrical steel sheets to each other, wherein an adhesion area ratio of the electrical steel sheet by the adhesion part is 1% or more and 40% or less.