A ceramic electronic component that includes an electronic component body having a superficial base ceramic layer; a surface electrode on a surface of the electronic component body; and a covering ceramic layer covering a peripheral section of the surface electrode. The peripheral section of the surface electrode that is covered by the covering ceramic layer has a thin portion located on a central side of the surface electrode and which is thinner than a central section of the surface electrode, and a width of the thin portion is 20% or more of a width of the peripheral section of the surface electrode that is covered by the covering ceramic layer.

An electronic device includes a printed circuit board (PCB). The PCB includes first and second grids disposed at a top surface and a bottom surface of the PCB, respectively. Each grid includes a plurality of footprint pins, and a plurality of vias extending through the PCB to the top and bottom surfaces. Each footprint pin includes a connecting end and a free end that opposes the connecting end. Each via includes a contact end located at one of grids and is in electrical contact with the connecting end of one of the footprint pins, and each via further includes a non-contact end that is located at the other of the grids and is not in electrical contact with any of the footprint pins. First and second connectors are mounted to the PCB top and bottom surfaces and connect with the footprint pins of the first and second grids.

According to one embodiment, a detection device includes a substrate, detection electrode, terminal formed of a metal material, lead, coating layer, conductive adhesion layer, and circuit board. The lead connects the electrode and the terminal. The coating layer covers the electrode and the lead, and partly covers the terminal. The adhesion layer covers a part of the terminal exposed from the coating layer and covers a part of the coating layer. The circuit board is connected to the terminal with the adhesion layer interposed therebetween. At least in an overlapping area where the adhesion layer covers the coating layer, an area of the metal material per unit area is smaller than that of the other area of the terminal.

Provided is a substrate including a first wiring layer, wherein the first wiring layer has a structure in which among a plurality of first connection parts of a plurality of vias, at least one of first connection parts of two vias located closer to both ends of the first wiring layer is coupled to a body of the first wiring layer through a first conductive portion, each of the plurality of first connection parts being coupled to the first wiring layer, and a cross-sectional area of the first conductive portion is less than an area of a first part of the first wiring layer, the first part being in contact with a first connection part of a via other than the first connection parts of the two vias.

A circuit board that includes a substrate that has an upper surface on which a circuit pattern is formed, and a lower surface to which a plurality of bus bars that are spaced apart are fixed; a placement through hole that extends through the upper surface and the lower surface and faces a bus bar of the plurality of bus bars and in which an electronic component is placed; and a terminal conductor foil that protrudes inward into the placement through hole from the lower surface and to which a terminal of the electronic component is connected.

A resin multilayer substrate includes a plurality of insulating resin base material layers and a plurality of conductor patterns provided on the plurality of insulating resin base material layers. The plurality of conductor patterns include a signal line and a ground conductor overlapping the signal line as viewed from a laminating direction of the insulating resin base material layers. A plurality of openings are provided in the ground conductor, and an aperture ratio is higher in a zone far from the signal line than in a zone adjacent to or in a vicinity of the signal line in a direction perpendicular or substantially perpendicular to the laminating direction.

A resin multilayer substrate includes a plurality of insulating resin base material layers and a plurality of conductor patterns provided on the plurality of insulating resin base material layers. The plurality of conductor patterns include a plurality of signal lines provided at positions not overlapping each other as viewed from a laminating direction of the insulating resin base material layers, and a ground conductor overlapping the plurality of the signal lines as viewed from the laminating direction. Openings are provided in the ground conductor and, as viewed from the laminating direction, an aperture ratio is higher in an inner zone that is sandwiched between two signal lines than in an outer zone of the two signal lines.

An electrode embedded member includes a plate-shaped substrate having a front surface and a back surface and that is made of a ceramic, an inner electrode extending parallel to the front surface of the substrate and that is embedded in the substrate, a connection member extending parallel to the front surface of the substrate and that is disposed so as to overlap the inner electrode, and a terminal connected to the connection member. The electrode embedded member has a predetermined structure including at least one of the following: a first predetermined structure in which a thickness of at least a part of the connection member in a direction perpendicular to the front surface of the substrate is 0.2 mm or smaller; a second predetermined structure in which the connection member includes a cutout portion; and a third predetermined structure in which the connection member is composed of a mesh structure.

A resin multilayer substrate includes a first resin layer including a thermoplastic resin as a main material, a second resin layer including the thermoplastic resin as a main material and superposed on the first resin layer, a first interlayer-connection conductor passing through the first resin layer in a thickness direction, and a first conductor pattern at an area including a region in which the first interlayer-connection conductor is exposed at the surface of the first resin layer between the first resin layer and the second resin layer. The first conductor pattern includes a portion in or at which a portion of the first interlayer-connection conductor is disposed. The first conductor pattern includes a first portion covering the region exposed at the surface of the first resin layer; and a second portion disposed surrounding the first portion. The first portion and the second portion have different thicknesses from each other.

A printed circuit board and a method for the production thereof. The printed circuit board can include a shaped part made of an electrically conducting material and can be used to manage the currents and heat volumes that occur in the field of power electronics.