Abstract:
A substrate has a coil that is a choke coil part and, for example, is used for controlling a motor. At the substrate, an electronic component mounting part is formed such that a circuit conductor therein is to be exposed to outside. A portion other than an externally connected portion such as the electronic mounting part is covered with substrate-forming resin to form an injection molded circuit board. The coil arranged at the substrate (the injection molded circuit board) is provided for smoothing current inputted from outside. A core part is formed at the coil by core-forming resin such that the coil part covers at least a center core part of the coil.
Abstract:
A circuit board includes a foil circuit provided on a synthetic resin plate formed by injection molding, made of a copper foil, and having a pattern different for the circuit board. Anchor pins projecting upward are provided on the resin plate and passed through pinholes made in the foil circuit. The foil circuit is positioned and secured to the resin plate. In a required portion of the resin plate, a terminal insertion hole is provided, and a receiving terminal is secured to the required portion of the terminal insertion hole and connected to the foil circuit.
Abstract:
An electronic circuit module and a method of manufacturing the electronic circuit module are disclosed. In one embodiment, the electronic circuit module includes i) a substrate on which a circuit is formed, ii) a plurality of electrical devices electrically connected to the circuit and iii) a first molding unit coated on the substrate to cover at least the electrical devices. The module further includes i) a test terminal unit comprising a plurality of test wires and configured to inspect the circuit, wherein each of the test wires comprises a first end electrically connected to the circuit and a second end exposed from the first molding unit, and wherein the second ends of the test wires form an inspection unit and are adjacent to each other on the substrate and ii) a second molding unit coated on the substrate to cover the second ends of the test wires.
Abstract:
A flexure has a metal base plate, an insulating layer formed on the metal base plate, a wiring pattern formed on the insulating layer, a read-write head connected to a first end of the wiring pattern, and terminals for external connection that are adjacent to each other and are connected to a second end of the wiring pattern. The flexure includes a hole formed through the insulating layer in the vicinity of respective one of the adjacent terminals and an exposed part being a part of the metal base plate that is exposed through the hole to the terminals. A distance between the respective one of the adjacent terminals and the exposed part exposed through the hole in the vicinity thereof is shorter than a distance between the adjacent terminals.
Abstract:
A female circuit board for use with a male circuit board has electrically conductive projections. The female circuit board includes a flexible insulating film. The flexible insulating film includes insertion portions into which the conductive projections of the male circuit board are allowed to be inserted. Each of the insertion portions includes a plurality of slits communicating with each other at the center of each of the insertion portions. The flexible insulating film further includes electrically conduction portions for making contact with the conductive projections to come into conduction with the male circuit board. The conduction portions are disposed around the insertion portions on the surface of the female circuit board facing the male circuit board when the female circuit board is in contact with the male circuit board. The conduction portions conform in shape to the insertion portions.
Abstract:
A printed circuit board is disclosed. The printed circuit board includes an insulation layer and a conductor layer having a GND pattern. The printed circuit board has a center portion, to which an element is to be mounted. The printed circuit board has a periphery portion and a slit pattern separating the periphery portion from the center portion. The GND pattern extends through the center portion and the periphery portion.
Abstract:
A printed circuit board includes a first signal layer, a second signal layer, and a dielectric layer sandwiched between the first signal layer and the second signal layer. The first signal layer includes two pads. The second signal layer includes two conducting pieces connected to two signal traces. The shape and material of the pads are the same as the shape and material of the conducting pieces. The projections of the pads on the second signal layer are overlapping with the conducting pieces.
Abstract:
An electrical power distribution unit (1) for an electrical system has a printed circuit board (200) with a punched grid (100) arranged thereon. An electrical component (300, 310) is arranged on the printed circuit board on a side of the punched grid (100). An electrical contact (350) of the electrical component projects through a passage opening in the printed circuit board. The punched grid is arranged between the electrical component and the printed circuit board, and an opening is formed in the punched grid in an area (130) around the electrical contact. The punched grid has a current infeed (110) which comprises a plurality of tongues (111, 112; 113). At least one of the tongues is bendable out of a plane of the punched grid in such a way that two of the tongues form a mutually adjacent common portion (115), which is electrically contactable by an electrical plug connector.
Abstract:
A motor drive apparatus includes an assembly of first and second subassemblies. The first subassembly includes a first board and at least one connecting member, such as a bus bar, formed in the first board, and arranged to form a current supply path from a power source to the motor. The second subassembly includes a second board and at least one switching device mounted on the second board. The first and second subassemblies are stacked with an interspace between the first and second boards. A terminal segment of the switching device is connected with a terminal segment of the connecting member.
Abstract:
The invention is to provide a semiconductor apparatus configured to position a semiconductor device reliably and easily without having a protruding portion formed in the bottom surface of the semiconductor device in the semiconductor apparatus. A semiconductor apparatus is fabricated by attaching a semiconductor device of a surface mount package type and a wiring member to a heat sink. A fitting portion in which the semiconductor device is fit is provided to the wiring member, so that the semiconductor device is positioned by fitting the semiconductor device into the fitting portion provided to the wiring member. According to the semiconductor apparatus of the invention, it becomes possible to position the semiconductor device at a high degree of accuracy.