Abstract:
A high frequency multilayer integrated circuit is provided with: a multilayer board including n earth conductor layers (n: integer of two or more than two) and (n-1) dielectric layers each arranged between adjacent earth conductor layers; a first high frequency circuit disposed in one of the most outside earth conductor layers of the multilayer board; a first power-supply/control circuit disposed in this most outside earth conductor layer; a second high frequency circuit disposed in at least one of the dielectric layers and connected to the first high frequency circuit in the multilayer board; a second power-supply/control circuit disposed in another one of the most outside earth conductor layers of the multilayer board; and a third power-supply/control circuit disposed in at least one of the dielectric layers at a portion at which the second high frequency circuit does not exist, the third power-supply/control circuit being connected to the first and second power-supply/control circuits.
Abstract:
An interference suppressor (10) for suppressing high-frequency interference emissions of a direct current motor (26) that is drivable in a plurality of stages and/or directions is proposed, having a plurality of capacitors (16) located on a first side (12) of a printed circuit board (14) and having a plurality of first conductor tracks (18), located on the first side (12) of the printed circuit board (14), for putting the various capacitors (16) into contact with a ground terminal (20), and having a first terminal (22) and at least one further terminal (24) for the individual stages of the direct current motor (26), the first terminal (22) and the at least one further terminal (24) being put into contact with a first connection line (48) for the first stage and at least one further connection line (50) for the at least one further stage of the direct current motor (26). The interference suppressor (10) is characterized in that a ground face (34) is located on a further side (32), diametrically opposite the first side (12), of the printed circuit board (14), and the first connection line (48) and the at least one further connection line (50) are fed through in insulated fashion relative to the ground face (34).
Abstract:
A semiconductor device package includes multiple built-up layers of metal sandwiching non-conductive layers. The metal layers have grids of degassing holes arranged in rows and columns. The rows and columns are locatable via a first coordinate system. Signal traces are embedded within the non-conductive layers such that the signal traces are also sandwiched between the metal layers with degassing holes. The signal traces generally run at zero degrees, 45 degrees, and 90 degrees relative to a second coordinate system. The first coordinate system is rotated relative to the second coordinate system to lower impedance variations of different traces. Impedance variations decrease due to the decreased variation in the number of degassing holes passed over or under by a trace. The grid of degassing holes on one metal layer can be offset in two dimensions relative to the degassing holes on another layer.
Abstract:
An electronic circuit module includes (i) a semiconductor integrated circuit component which is a transistor integrated circuit formed on a semiconductor substrate, (ii) a passive element component constituting a peripheral circuit of the semiconductor integrated circuit component, and (iii) first and second circuit substrates each of which has a component mounting surface on which at least one of the semiconductor integrated circuit component and the passive element component. The respective component mounting surfaces of the first and second circuit substrate face one another. The first circuit substrate functions as one outer wall of a housing, where the electronic circuit module contacts an external circuit substrate on which the electronic circuit module is mounted. The second circuit substrate functions as the other outer wall of the housing of the module.
Abstract:
A chip-on-film package may include a tape wiring substrate, a semiconductor chip mounted on the tape wiring substrate, and a molding compound provided between the semiconductor chip and the tape wiring substrate. The tape wiring substrate may include a film having upper and lower surfaces. Vias may penetrate the film. An upper metal layer may be provided on the upper surface of the film and include input terminal patterns and/or output terminal patterns. The input terminal patterns may include ground terminal patterns and/or power terminal patterns. A lower metal layer may be provided on the lower surface of the film and include a ground layer and/or a power layer. The ground layer and the power layer may cover at least a chip mounting area.
Abstract:
Providing a method of shielding a flat circuit body, which can improve efficiency of assembling a shield film and reliability thereof, and a wiring harness including the shielded flat circuit body, the shielded flat circuit body of the wiring harness includes a FFC having insulator covering around a conductor, a shield film covering the FFC and a connecting terminal. The clamp blade is pierced through an end of the FFC and is bent so as to connect electrically to the conductor. A joint blade extending perpendicularly from a joint terminal, which connects a plurality of conductors to each other, is pierced through the shield film and the FFC in the same direction of piercing the clamp blade, and is bent so as to connect the conductor and the shield film electrically.
Abstract:
Light that has entered a lens held by a barrel portion of a three-dimensional circuit board transmitting virtually no visible light enters a semiconductor imaging device held inside the three-dimensional circuit board. On the side opposite to the barrel portion, the three-dimensional circuit board is provided with a flexible printed circuit for sending a signal to and receiving a signal from the semiconductor imaging device. The region of the flexible printed circuit facing the semiconductor imaging device has sufficient shielding characteristics in a range sensitive to light reception by the semiconductor imaging device. This makes it possible to provide a sufficient shield against a light beam entering from the back surface of the semiconductor imaging device, so that the image quality does not deteriorate even when a conventional shielding sheet is not used. Since the shielding sheet becomes unnecessary, it is possible to reduce the cost of the shielding sheet itself and the number of steps of bonding the shielding sheet. Furthermore, the thickness corresponding to the shielding sheet and the adhesive can be reduced.
Abstract:
A printed circuit board (PCB) is provided for use in electrical apparatus. The PCB has a plurality of layers, at least one layer being dedicated to define the PCB's external electromagnetic environment and at least one further layer used for another known PCB function.
Abstract:
Concepts for conveniently arranging devices for the transduction of signals to and from voltage and current domains to infrared radiation domains is described. Specifically, optoelectronic components and methods of making the same are described. In one aspect, the optoelectronic component includes a base substrate having a pair of angled (or substantially perpendicular) faces with electrical traces extending therebetween. A semiconductor chip assembly is mounted on the first face of the base substrate and a photonic device is mounted on the second face. Both the semiconductor chip assembly and the photonic device are electrically connected to traces on the base substrate. The semiconductor chip assembly is generally arranged to be electrically connected to external devices. The photonic devices are generally arranged to optically communicate with one or more optical fibers. The described structure may be used with a wide variety of photonic devices. In some embodiments the base substrate is formed from a ceramic material having the electrical traces formed thereon. In other implementations the substrate includes a backing block having a flexible printed circuit substrate adhered thereto.
Abstract:
A multilayer interconnection board (10) comprises a dielectric substrate (11), a through-hole (15), a signal line (12) having a large width section (12A) and a small width section (12B) connected with the through-hole (15), and a ground layer (13, 14). A length L (mm) of the small width section (12B) meets the formula of 0