A special electric component, such as a motor, an accumulator, or an electric subassembly, having at least one soldering pin for solder-joining the special electric component to a printed circuit board. The soldering pin has a connection end that comprises a front section at a free end of the soldering pin and a first section adjacent the front section. The front section has a width that is smaller than the width of the first section. A printed circuit board assembly and an electric device comprising at least one special electric component.

A semiconductor device includes: an annular or partially annular substrate; a first control circuit provided on the substrate and configured to control a first phase of a motor; a second control circuit provided on the substrate so as to be adjacent to the first control circuit in a circumferential direction of the substrate and configured to control a second phase of the motor; a power supply wiring disposed on one of outer and inner circumferential sides of the first and second control circuits in a radial direction of the substrate, the power supply wiring being connected to the first and second control circuits, and extending in the circumferential direction; and a ground winding disposed on another one of the outer and inner circumferential sides of the first and second control circuits in the radial direction, being connected to the first and second control circuits, and extending in the circumferential direction.

A brushless DC motor fan is provided. The brushless DC motor fan includes a rotor and a stator module. The rotor has a shaft disposed on an inner side of the stator module and rotating relative to the stator module. The stator module has a coreless coil and a lead frame, wherein the lead frame includes six pins electrically connected to the coreless coil.

An electronic assembly including a cooling device comprises a cooling plate equipped, on its upper face, with a plurality of pin-fins; a first printed circuit board including at least one heat-generating zone bearing against the lower face of the cooling plate; each pin including a blowing means comprising a hub equipped with blades, the blades being arranged axially along each pin so as to be able to rotate about the pin, thus creating a flow of air for cooling the pins.

An electronic assembly includes a first electronic component, a second electronic component, and a primary circuit board. The first electronic component is provided with a first secondary circuit board, the second electronic component is provided with a second secondary circuit board, the first secondary circuit board is electrically connected to the primary circuit board by using a first electrical connector, interlayer space is formed between the first secondary circuit board and the primary circuit board, a portion of the second secondary circuit board that enters the interlayer space overlaps the first secondary circuit board and is electrically connected to the primary circuit board by using a second electrical connector, the first electrical connector is located between the first secondary circuit board and the primary circuit board, and the second electrical connector is located between the second secondary circuit board and the primary circuit board.

The servo motor includes a casing, a stator, a rotor and a circuit board. The casing has a hollow body, a first bearing and a second bearing. The hollow body is mounted between the first bearing and the second bearing. The stator is disposed inside the hollow body, and surrounds an axial hollow portion. The rotor is disposed inside the stator. A shaft passes through the rotor in an axial direction, and two ends of the shaft are respectively mounted on the first bearing and the second bearing. The circuit board is disposed inside the hollow body and interposed between the stator and the first bearing, the periphery of the circuit board has a plurality of solder pads electrically connected to the stator. An outer surface of the circuit board has a protection layer, which covers the region of the solder pads near the outer edge of the periphery.

Flexible printed circuit boards and related methods are disclosed herein. An example printed circuit board includes a controller interface coupled to a surface of the printed circuit board between a first end of the printed circuit board and a second end of the printed circuit board. The example printed circuit board includes a connector coupled to the surface proximate to the first end. The example printed circuit board includes a notch formed between the controller interface and the connector. The notch is to form a narrowed portion of the printed circuit board to enable the printed circuit board to bend at the narrowed portion.

A circuit assembly (20) provided with: a circuit board (21); a capacitor (30) connected to the circuit board (21); and a circuit casing (20C) configured to house the circuit board (21) and the capacitor (30). The capacitor (30) is provided with: a component body (31) including a pair of connection terminals (32A and 33A) to be fixed to the circuit board (21); and a first fixing unit (41) and a second fixing unit (42) configured to fix the component body (31) to the circuit casing (20C) at both sides. The connection terminals (32A and 33A) are disposed with a fixed line (L1) connecting the first fixing unit (41) and the second fixing unit (42) interposed therebetween, and both of the pair of connection terminals (32A and 33A) protrudes sideward from the component body (31) between a first surface of the circuit board (21) and the circuit casing (20C), and extends toward the circuit board (21). Distal ends (P2) of each of the connection terminals (32A and 33A) are fixed to the circuit board (21) in a vicinity of the first fixing unit (41).

An object is to provide an output-noise reduction device that can prevent noise from an electronic device accommodated in a metal casing from being transmitted due to electromagnetic coupling. An output voltage is extracted to the outside through a conducting bar. A magnetic body core includes a through hole through which the conducting bar is inserted. A chip capacitor is mounted on a mounting board and connects between the output terminal VO and ground potential. A section from the output terminal VO to at least part of the chip capacitor mounted on the mounting board is isolated from the electromagnetic coupling from the electronic device. Thus, noise is prevented from being transmitted to the output terminal VO.

A circuit assembly includes a circuit board on which a coil is mounted, a heat sink, and a heat spreading plate that is separate from this heat sink. A first insulating adhesive layer is interposed between the circuit board and the heat spreading plate, and the heat spreading plate and the heat sink are fixed by a first fixing hole for a heat sink and a bolt. Accordingly, warping of the circuit board is suppressed.