Abstract: Disclosed herein is a coil component that includes a coil part embedded in a magnetic element body. The coil part has a structure in which plural interlayer insulating films and plural conductor layers having a coil pattern are alternately stacked. At least one of the conductor layers has a clearance area having no coil pattern and extending radially outward from a center axis of the coil part. The magnetic element body includes a first magnetic resin layer provided in an inner diameter area of the coil part, a second magnetic resin layer provided in a radially outside area of the coil part, and a fifth magnetic resin layer filled in the clearance area and contacting the first and second magnetic resin layers.

Abstract: Disclosed herein is a coil component that includes a coil conductor embedded in the element body; a first bump conductor exposed to the mounting surface and the first and side surfaces; a second bump conductor exposed to the mounting surface and the second and fourth side surfaces; a first dummy bump conductor exposed to the mounting surface and the first and fourth side surfaces; a second dummy bump conductor exposed to the mounting surface and the second and third side surfaces; a first conductive resin layer connecting the first bump conductor and first dummy bump conductor; and a second conductive resin layer connecting the second bump conductor and the second dummy bump conductor. The first and bump conductors and the first and second dummy bump conductors are not covered at least partly with the first conductive resin layer.

Abstract: Disclosed herein is a coil component that includes, first and second magnetic element bodies, first and second coil conductors embedded respectively in the first and second magnetic element bodies, first and second terminal electrodes exposed from the first magnetic element body and connected respectively to one end and other end of the first coil conductor, third and fourth terminal electrodes exposed from the second magnetic element body and connected respectively to one end and other end of the second coil conductor, and a low-permeability layer provided between the first and second magnetic element bodies and being lower in permeability than the first and second magnetic element bodies.

Abstract: Disclosed herein is a coil component that includes an element body having a mounting surface, a coil part embedded in the element body, and a first conductor post embedded in the element body. The first conductor post has a first end connected to the coil part and a second end exposed from the mounting surface. A surface of the element body on the mounting surface side has a recess from a surface of the first conductor post.

Abstract: Disclosed herein is a coil component that includes a magnetic element body, and a coil part embedded in the magnetic element body. The magnetic element body includes a first region covering the coil part from one side in a coil axis direction, a second region covering the coil part from other side in the coil axis direction, and a third region positioned in an inner diameter area of the coil part so as to connect the first and second regions. The height of the coil part in the coil axis direction decreases toward the inner diameter area.

Abstract: To prevent a short-circuit failure by controlling the flow of a solder in a surface-mount type coil component. A coil component includes a coil part in which conductor layers and interlayer insulating layers are alternately stacked. The conductor layers respectively have coil conductor patterns embedded in the coil part and electrode patterns exposed from the coil part. The interlayer insulating layers each protrude from the plurality of electrode patterns at a part between the electrode patterns, and the flow of a solder in the stacking direction is suppressed by the protruding parts. This makes it possible to prevent a short-circuit failure due to the flow of a solder in the stacking direction.

Abstract: A coil component includes: a magnetic element body made of resin containing conductive magnetic powder; a coil part 20 obtained by alternately stacking a plurality of conductor layers and a plurality of interlayer insulating layers, the plurality of conductor layers respectively including coil conductor patterns embedded in the magnetic element body and electrode patterns exposed from the magnetic element body; external terminals provided respectively on the electrode patterns and electrode patterns; and a protective insulating layer covering the magnetic element body in such a manner as to expose the external terminals therethrough. The magnetic element body is thus covered with the protective insulating layer, so that it is possible to prevent adhesion of plating to an unnecessary portion and exposure of the coil conductor patterns even when the surfaces of the external terminals are subjected to electrolytic plating.

Abstract: A coil component includes a coil part having a structure in which interlayer insulating films 51 to 55 and coil patterns CP1 to CP4 are alternately stacked in the coil axis direction and magnetic element bodies M1 to M4 embedding therein the coil part. A radial width of a part of the interlayer insulating film that is positioned between the magnetic element body M1 positioned in the inner diameter area of the coil part and the innermost turn of the coil pattern CP4 is larger than radial widths L11, L21, and L31 of parts of the interlayer insulating films 52 to 54 that are positioned between the magnetic element body M1 and the innermost turns of the coil patterns CP1 to CP3.

Abstract: Disclosed herein is a coil component that includes a conductor layer including a coil pattern and a terminal pattern provided independently of the coil pattern and exposed from the magnetic element body. The terminal pattern includes a linear part having a substantially constant pattern width in a direction perpendicular to the side surface of the magnetic element body, a widened part positioned at one end side in a second direction. The outermost turn of the coil pattern includes a first section provided along the linear part, a second section provided along the widened part, and a fourth section provided along the magnetic element body and positioned on a side opposite to the first section with respect to the second section. The pattern width of the coil pattern is larger in the second sections than in the first and fourth sections.

Abstract: Disclosed herein is a chip-type coil component that includes a magnetic element body, a coil pattern embedded in the magnetic element body, and a terminal electrode connected to the coil pattern and exposed to a mounting surface of the magnetic element body. A recessed part obtained by removing a part of the magnetic element body is formed in an upper surface of the magnetic element body positioned on a side opposite the mounting surface to function as a directional mark.

Abstract: Disclosed herein is a coil component that includes a first conductor layer, one or more third conductor layers, and a second conductor layer stacked one another in this order. One end of the coil pattern in the first conductor layer is connected to first terminal patterns in the second and third conductor layers. The first terminal pattern in the second conductor layer is connected to a first terminal electrode. One end of the coil pattern in the second conductor layer is connected to a second terminal electrode. The width in a radial direction of the first terminal pattern positioned in the third conductor layer is larger than the width in the radial direction of the second terminal pattern positioned in the third conductor layer.

Abstract: Disclosed herein is a surface-mount electronic component that includes a main body part having a mounting surface, a first terminal electrode provided on one end side of the mounting surface in a long side direction thereof, and a second terminal electrode provided on other end side of the mounting surface in the long side direction thereof. Each of the first and second terminal electrode includes a main area extending in a short side direction of the mounting surface and a protruding part provided at a center portion in the short side direction so as to protrude from the main area to an end portion of the mounting surface in the long side direction.

Abstract: Disclosed herein is a coil component that includes a coil part having a structure in which a plurality of conductor layers each having a coil pattern are stacked in a coil axis direction through a plurality of interlayer insulating films, a first magnetic layer covering the coil part in the coil axis direction, and a second magnetic layer positioned in an inner diameter area of the coil part. The plurality of interlayer insulating films include a first interlayer insulating film positioned closest to the first magnetic layer. The first and second magnetic layers contact each other through an opening formed in the first interlayer insulating film. The opening has a shape whose diameter increases as a distance from an interface between the first and second magnetic layers increases.

Abstract: To achieve a high inductance value while reducing the entire thickness in a coil component having a structure in which spiral coil patterns are stacked. A coil component includes: a coil part having a structure in which interlayer insulating films and spirally wound coil patterns are alternately stacked in the axial direction of the coil component; and magnetic element members embedding therein the coil part. The interlayer insulating film covering, from one end side in the axial direction, one coil pattern positioned at the one end in the axial direction is higher in permeability than the interlayer insulating films. Thus, the one coil pattern positioned at the end portion is covered with the interlayer insulating film having a high permeability, so that it is possible to achieve a high inductance value while reducing the entire thickness.

Abstract: Disclosed herein is a coil component that includes an element body having first and second magnetic layers and a coil part positioned therebetween, and first and second external terminals formed on the element body. The first external terminal is formed on the mounting surface and the first side surface. The second external terminal is formed on the mounting surface and the second side surface. The first and second external terminals formed on the first and second side surfaces, respectively, have a meander shape.

Abstract: A coil-embedded magnetic core capable of achieving improvements both in insulation and initial magnetic permeability, and coil devices thereof. The coil-embedded magnetic core embedding a coil made of a conductor, including magnetic powder and a resin, in which the coil-embedded magnetic core further includes a modifier.

Abstract: Disclosed herein is a coil component that includes: a magnetic element body containing magnetic powder, the magnetic element body having first and second surfaces; a coil conductor embedded in the magnetic element body; and an external terminal connected to the coil conductor and exposed on the first surface of the magnetic element body. The second surface of the magnetic element body is free from the external terminal. The first surface is greater in surface roughness than the second surface.

Abstract: A coil component is provided with a coil part in which a plurality of conductor layers and a plurality of interlayer insulating layers are alternately laminated; and a sealing resin layer that covers the coil part. The conductor layers each include a spiral pattern. The interlayer insulating layers each cover an upper surface and a side surface of the spiral pattern. The recessed part is formed in the side wall surface of the interlayer insulating layer. A part of the sealing resin layer is embedded in the recessed part.

Abstract: A coil component includes: a first magnetic resin layer in a lower area; a second magnetic resin layer in an inner diameter area surrounded by a coil pattern, an outer peripheral area that surrounds the coil pattern, and an upper area; and an insulating gap layer between the first and second magnetic resin layers. A part of the insulating gap layer positioned between the first magnetic resin layer and a part of the second magnetic resin layer positioned in the inner diameter area is curved in the axial direction. A magnetic substrate need not be used. The insulating gap layer is provided, allowing the insulating gap layer to function as a magnetic gap. The insulating gap layer is curved in the axial direction, so that a contact area between the insulating gap layer and the first and second magnetic resin layers are increased to enhance adhesion therebetween.

Abstract: Disclosed herein is a composite electronic component that includes: a first coil pattern formed on at least a first conductor layer, the first coil pattern having one end coupled to the first terminal electrode and other end coupled to the second terminal electrode; a second coil pattern formed on at least a second conductor layer; a third coil pattern formed on at least the first and second conductor layers, the third coil pattern having one end coupled to the one end of the second coil pattern and other end coupled to the third terminal electrode; and a fourth coil pattern formed on at least the first and second conductor layers, the fourth coil pattern having one end coupled to the other end of the second coil pattern and other end coupled to the fourth terminal electrode.