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 plurality of conductor layers constituted of a first conductor layer to a fourth conductor layer that includes a function layer and a coil layer wound around an axis center; and a covering portion that is formed of an insulative resin, integrally covers the plurality of conductor layers, and is interposed between conductor layers adjacent to each other. The coil layer and the function layer of the plurality of conductor layers have substantially the same shape in a plan view. The fourth conductor layer has a connection conductor layer connecting the coil layer and the function layer to each other. A conductor layer having no connection conductor layer among the plurality of conductor layers has a protrusion portion corresponding to the connection conductor layer at a position overlapping the connection conductor layer in a plan view.

Abstract: Disclosed herein is a coil component that includes: a coil part in which a plurality of conductor layers and a plurality of interlayer insulting layers are alternately laminated, the coil part having a mounting surface substantially parallel to the lamination direction and an upper surface substantially parallel to the lamination direction and positioned on an opposite side to the mounting surface; and a direction mark comprising a conductive material that covers a part of the conductor layers exposed on the upper surface.

Abstract: A method for producing a carbon material, the method including a step of performing a carbonization treatment by heating an organic polymer material to a temperature higher than 400° C. in a non-oxidizing atmosphere containing a gaseous substance (A) composed of at least one of acetylene and an acetylene derivative.

Abstract: Disclosed herein is a multilayer wiring structure that includes a first metal layer; an interlayer insulating film formed on the first metal layer, the interlayer insulating film having an opening that exposes a first area of the first metal layer; a second metal layer formed on an inner wall of the opening; and a third metal layer filling the opening via the second metal layer. The first and third metal layers are direct contact with each other at a bottom of the opening.

Abstract: Disclosed herein is a multilayer wiring structure that includes a first metal layer; an interlayer insulating film formed on the first metal layer, the interlayer insulating film having an opening that exposes a first area of the first metal layer; a second metal layer formed on an inner wall of the opening; and a third metal layer filling the opening via the second metal layer. The first and third metal layers are direct contact with each other at a bottom of the opening.

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 plurality of conductor layers constituted of a first conductor layer to a fourth conductor layer that includes a function layer and a coil layer wound around an axis center; and a covering portion that is formed of an insulative resin, integrally covers the plurality of conductor layers, and is interposed between conductor layers adjacent to each other. The coil layer and the function layer of the plurality of conductor layers have substantially the same shape in a plan view. The fourth conductor layer has a connection conductor layer connecting the coil layer and the function layer to each other. A conductor layer having no connection conductor layer among the plurality of conductor layers has a protrusion portion corresponding to the connection conductor layer at a position overlapping the connection conductor layer in a plan view.

Abstract: Disclosed herein is a coil component that includes: a coil part in which a plurality of conductor layers and a plurality of interlayer insulting layers are alternately laminated, the coil part having a mounting surface substantially parallel to the lamination direction and an upper surface substantially parallel to the lamination direction and positioned on an opposite side to the mounting surface; and a direction mark comprising a conductive material that covers a part of the conductor layers exposed on the upper surface.

Abstract: A method for producing a carbon material, the method including a step of performing a carbonization treatment by heating an organic polymer material to a temperature higher than 400° C. in a non-oxidizing atmosphere containing a gaseous substance (A) composed of at least one of acetylene and an acetylene derivative.

Abstract: [Subject] The object of the present invention is to provide a method for producing siloxane oligomers which contain a small amount of ring form and have a high molecular weight. [Solving Means] An embodiment of the present invention is a method for producing siloxane oligomers which includes using a 2-hydroxycarboxylic acid compound represented by a predetermined formula as a catalyst and subjecting an alkoxysilane to hydrolysis and condensation. According to the production method of the present invention, it is possible to synthesize siloxane oligomers with a low content of siloxanes having cyclic structures and a high molecular weight.