Embodiments are directed to a method of forming a laminated magnetic inductor and resulting structures having anisotropic magnetic layers. A first magnetic stack is formed having one or more magnetic layers alternating with one or more insulating layers. A trench is formed in the first magnetic stack oriented such that an axis of the trench is perpendicular to a hard axis of the magnetic inductor. The trench is filled with a dielectric material.

Disclosed herein is a coil component that includes a spiral conductor, a magnetic material layer covering the spiral conductor and having a through hole exposing an end of the spiral conductor, a through-hole conductor embedded in the through hole and has first region and second regions that are exposed from the magnetic material layer, a first conductor layer formed on an upper surface of the magnetic material layer and covering the first region of the through-hole conductor without covering the second region, and a second conductor layer covering the first conductor layer and the second region of the through-hole conductor, wherein the second conductor layer has a lower resistance than the first conductor layer.

A coil electronic component includes a body and external terminals. The body includes a winding coil part and a pillar-shaped core part inserted inside of the winding coil part and formed of a magnetic metal. The external terminals are connected to the winding coil part and disposed on an external surface of the body. The body contains the magnetic metal and a resin, and the pillar-shaped core part has magnetic permeability higher than that of a portion of the body disposed outside of the winding coil part.

A coil component includes a drum core and first and second wires. The first wire includes a first extending portion. The second wire includes a third extending portion. The first and third extending portions are not in contact with each other. Each of the first and second wires includes a coat including a first region and a second region. The coat in the first and third extending portions is the second region at least in part. The coat is the first region at a contacting point where the first and second wires are in contact for the first time from a first flange portion in the drum core.

A coil component includes a first alignment winding region in which a second wire is continuously wound so as to have turns such that the turns of the second wire are aligned with turns of a first wire having the same ordinal number outside the first wire in a direction perpendicular to a central axis. The ordinal number is counted from the turn nearest to the first flange portion.

An inductor has a main magnet core, a coil mounted around the main magnet core, and a residual magnet encapsulating the main magnet core and partially encapsulating the coil. The main magnet core is made of a main magnet core powder containing amorphous iron base material and nickel base material powders. The residual magnet is made of a residual magnet powder containing a main magnet powder and a soft magnet powder including an iron-silicon-chromium alloy powder and a carbonyl iron powder. Thus, through a low-loss feature of the amorphous iron base material and nickel base material powders, a loss of the main magnet core is reduced. Furthermore, a magnetic permeability of the residual magnet matches a magnetic permeability of the main magnet core. A magnetic leakage is further avoided, and the alternating current resistance is reduced. A quality factor and a conversion efficiency are enhanced.

A magnetic part including: a coil that generates a magnetic flux when a current flows through the coil; a core that is formed of a magnetic substance that forms a magnetic path of the magnetic flux; a support member that supports the core; and a fixing member that fixes the core to the support member. The core includes a column portion that is vertically provided with respect to a surface where the core is in contact with the support member. The fixing member presses the column portion of the core against the support member. The support member has a recess in a portion of a facing surface that faces the core, where the portion of a facing surface does not face the column portion.

Disclosed herein is a coil component that includes: a first core having a mounting surface and a coil placing surface positioned opposite to the mounting surface; a lower coil placed on the coil placing surface such that a coil axis of the lower coil extends substantially perpendicular to the coil placing surface, the lower coil having one end drawn to a first area of the mounting surface and other end drawn to a second area of the mounting surface; and an upper coil substantially coaxially stacked on the lower coil, the upper coil having one end drawn to a third area of the mounting surface and other end drawn to a fourth area of the mounting surface. The lower coil is greater in a coil diameter than the upper coil.

Disclosed herein is a coil component that includes: a first core having a mounting surface and a coil placing surface positioned opposite to the mounting surface; a lower coil placed on the coil placing surface such that a coil axis of the lower coil extends substantially perpendicular to the coil placing surface; an upper coil substantially coaxially stacked on the lower coil; and a second core disposed through inner diameter areas of the lower and upper coils. The number of turns of one of the lower and upper coils is larger by less than one turn than other one of the lower and upper coils. The diameter of the second core is larger at a first section surrounded by the other one of the lower and upper coils than at a second section surrounded by the one of the lower and upper coils.

A coil component including a coil formed by winding an insulation-coated wire and a composite magnetic body embed with the coil, wherein the composite magnetic body contains: a metallic magnetic powder made by powderizing a metallic magnetic material and a binder resin; and wherein the average particle size D.sub.50[m] of the metallic magnetic powder satisfies the following formula (1):

D.sub.502.192(Fmax).sup.0.518.sup.0.577(1)

wherein (Fmax) is an upper limit operation-frequency [MHz] at which Q-value starts decreasing beyond the maximum value in a case of increasing the frequency applied to the coil component, and is electrical-resistivity [.Math.cm] of the metallic magnetic material.