A solution is provided that can be used in a communication node. A case is provided that supports a card module. The card module includes a circuit board with a front edge and a rear edge and includes a chiclet mounted adjacent the front edge. A housing can be pressed onto the circuit board and chiclet and be retain the housing in place. A transformer box is provided is provided on the circuit board between the housing and the rear edge. A POE card can be mounted on the circuit board between the transformer box and the housing.

A coil component, adopted to be mounted on an electronic device, includes: an element body part; a coil fixed to the element body part and constituted by a wound conductive wire; lead wires that are each extended from the conductive wire and led out from the coil, and whose tip parts are each disposed a bottom face, which is a mounting face, of the element body part; and terminal parts that are each constituted by the tip part and a metal member that is joined to the tip part on the bottom face, and also has an opening at a position overlapping the tip part in a direction intersecting the bottom face.

An inductance element includes: an insulative substrate body of a rectangular solid shape having length dimension L, height dimension H, and width dimension W, where 1.5≤W/H; at least one internal conductor built in the substrate body and capable of making an electrical current flow therethrough in one uniform direction orthogonal to a cross-section of the substrate body; and a pair of external electrodes provided on the surface of the substrate body in a manner respectively connected to both ends of the internal conductor, so that the internal conductor can make an electrical current flow therethrough in the one uniform direction; wherein, in the cross-section of the substrate body, a rectangular internal conductor region having height dimension Eh and width dimension Ew surrounds the internal conductor in a manner contacting the outermost positioned portions of the internal conductor in the height and width directions, wherein Ew/Eh>W/H.

A substrate-fastening device and a substrate-assembling structure are disclosed. The substrate-fastening device includes a base and a fastening component. The base correspondingly carries a substrate including a perforation. The fastening component is disposed on the base, corresponds to the perforation, and includes a supporting portion, a positioning portion, a resin-attaching portion, an end portion and a fixation resin. The supporting portion is disposed on the base to support the substrate. The positioning portion is disposed on a supporting surface of the supporting portion and extended along the perforation. The resin-attaching portion is extended along the perforation. The end portion is connected to the positioning portion through the resin-attaching portion. The fixation resin is disposed around the resin-attaching portion and connected between the end portion and the positioning portion. The fixation resin covers the second surface adjacent to the perforation, and fills the gap between the resin-attaching portion and the perforation.

The invention relates to an electrical filter element (1) for filtering alternating voltage interference. The electrical filter element (1) comprises two dielectric circuit board substrates (11, 12) having a magnetic core (13) arranged between the circuit board substrates. The magnetic core (13) has a material-free inner region (13a), in which electrical connection elements (21-24) are provided between the two dielectric circuit board substrates (11, 12). Furthermore, electrical connection elements (31, 32) can also be provided between the two dielectric circuit board substrates (11, 12) in an outer region of the magnetic core (13).

A multilayer substrate includes a pair of first capacitor electrodes, a pair of second capacitor electrodes, and a dielectric substrate. Electrodes of the pair of first capacitor electrodes are disposed in dielectric substrate so as to face each other in a thickness direction of the dielectric substrate. Electrodes of the pair of second capacitor electrodes are disposed in the dielectric substrate so as to face each other in the thickness direction. A first element and a second element that are disposed in or on the dielectric substrate, and the pair of second capacitor electrodes, the pair of first capacitor electrodes, and a ground electrode that are disposed in the dielectric substrate are arranged in the stated order in the thickness direction. The pair of second capacitor electrodes at least partially overlaps the pair of first capacitor electrodes when viewed in plan in the thickness direction.

A power converter includes an amplifier, an inductor, a capacitor, and an interconnection block formed of an insulating material having conductive material deposited thereon by a multi-material printing process. The interconnection block supports one of the inductor and the capacitor in a manner that the one the inductor and the capacitor is disposed vertically above an other of the inductor and the capacitor.

A radio-frequency module includes a mounting board, a first electronic component, and a second electronic component. The second electronic component is lower in height than the first electronic component. The mounting board includes dielectric layers, conductive layers, and via-conductors. In the mounting board, the dielectric layers and the conductive layers are stacked in the thickness direction of the mounting board. The mounting board has a first region and a second region. The first region overlaps the first electronic component and extends from a first major surface to a second major surface. The second region overlaps the second electronic component and extends from the first major surface to the second major surface. In the mounting board, the conductive layers in the first region are fewer than the conductive layers in the second region. In the mounting board, the first region is thinner than the second region.

A power supply voltage terminal and a ground terminal having a rectangular cross section are respectively connected to a first terminal hole of a power supply pattern and a second terminal hole of a ground pattern. An inductor is surface-mounted on a substrate, and has a rectangular parallelepiped shape in which an input end connected to a power supply pattern and an output end connected to a power supply relay face each other. A first electrode terminal of a capacitor is connected to the power supply pattern, a second electrode terminal is connected to the ground pattern, and constitutes a filter circuit together with the inductor. A wall surface of an input end of the inductor is arranged parallel to the longitudinal axis direction (x direction) of the first terminal hole. The inductor opposes the first terminal hole so as to include the entire length Wh of the first terminal hole within the width Wt of the input end in the x direction.

Devices including a substrate and a plurality of coil portions disposed on the substrate. The plurality of coil portions electrically coupled to form a coil structure.