Abstract:
In a high-frequency module, an antenna device is disposed on a first principal surface of a second substrate, a first principal surface of a first substrate and a second principal surface of the second substrate face each other and are connected to each other by conductive connecting members, electronic components including an IC chip are mounted on the first principal surface of the first substrate, ground electrodes are disposed on the first and second substrates, the conductive connecting members are connected to a ground potential, and thus the IC chip is surrounded by the ground electrodes of the first and second substrates and the conductive connecting members.
Abstract:
A wiring board includes: an insulating base; a plurality of conductive wirings; and bumps formed on the conductive wirings, respectively. The conductive wirings can be connected with electrode pads of a semiconductor element via the bumps. The conductive wirings include a connection terminal portion at an end portion opposite to the other end portion where the bumps are formed, and at the connection terminal portion, the conductive wirings can be connected with an external component. The conductive wirings include first conductive wirings and second conductive wirings, on which the bumps are formed respectively at a semiconductor element mounting region. The first conductive wirings extend from the bumps to the connection terminal portion. The second conductive wirings extend beyond the semiconductor element mounting region from the bumps but do not reach the connection terminal portion. End portions of the second conductive wirings extending beyond the semiconductor element mounting region are separated electrically from the first conductive wirings by a cutting portion formed at a boundary region with the first conductive wirings. Irrespective of the state of operating electrode pads of a semiconductor element to be mounted, the bumps can be arranged at constant intervals.
Abstract:
A tape circuit substrate and semiconductor apparatus employing the same, and a method for forming a tape circuit substrate may reduce or eliminate electromagnetic interference (EMI) and provide a substrate or apparatus which can supply a more stable power supply voltage. The tape circuit substrate may include an insulation film and a wiring pattern formed on the insulation film to define an electronic device-mounting region and including a ground electrode. The tape circuit substrate may include a ground electrode pattern formed at the electronic device-mounting region so as to be insulated from the wiring pattern, except where the ground electrode pattern is connected to the ground electrode.
Abstract:
An IC package includes a package body of non-conductive material. A conductive heat-sink pad includes an interior pad portion located within an interior of the package body. An exterior pad portion is located external to the package body. The exterior pad portion includes at least two pad pieces that are spaced apart to define at least one channel that separates the at least two pad pieces, the at least two pad pieces being electrically connected with each other. The at least two pad pieces may be flush with an underside surface of the package body or one or more of the pad pieces may extend outwardly from the package body.
Abstract:
An electronic assembly includes a substrate and at least one surface mounted electronic component. The substrate includes a first side and a second side opposite the first side. The first side of the substrate includes a plurality of conductive traces formed thereon. The plurality of conductive traces includes a first conductive trace and a second conductive trace. The electronic component is electrically coupled between the first and second conductive traces. A component body of the electronic component is subject to interaction with a flux, which is utilized during electrical coupling of the electronic component to the first and second conductive traces, to form a current leakage path. The substrate is configured to prevent the formation of the current leakage path.
Abstract:
A flexible printed circuit board includes a substrate layer composed of insulating material, a protection circuit of a thin-film capacitor element, the protection circuit including a first wiring layer on the substrate layer, a dielectric layer, and a counter electrode layer. At least a portion of each of the first wiring layer and the counter electrode layer serves as a terminal. The front surface of each of the first wiring layer and the counter electrode layer, except the terminal portion, is covered with an insulating coating.
Abstract:
A printed circuit board (PCB) assembly includes a first PCB (100) and a second PCB (200), respectively including first conductor trace lines (102) and second conductor trace lines (108) for providing electronic connections among a plurality of electronic components. The first PCB is disposed above the second PCB, and is parallel with the second PCB. The first PCB is electronically connected to the second PCB via at least one of the first conductor trace lines and the second conductor trace lines. A surface area of the first PCB is smaller than that of the second PCB. The second PCB is used as a primary circuit board for a layout of electronic components. Preferably, complex or high voltage circuits are disposed on the first PCB, and other circuits are disposed on the second PCB.
Abstract:
An IC package includes a package body of non-conductive material. A conductive heat-sink pad includes an interior pad portion located within an interior of the package body. An exterior pad portion is located external to the package body. The exterior pad portion includes at least two pad pieces that are spaced apart to define at least one channel that separates the at least two pad pieces, the at least two pad pieces being electrically connected with each other. The at least two pad pieces may be flush with an underside surface of the package body or one or more of the pad pieces may extend outwardly from the package body.
Abstract:
A fan housing of a fan unit includes a housing wall standing from the surface of a printed circuit board. The printed circuit board serves to establish the fan housing in cooperation with the housing wall. The fan housing further includes a ceiling wall connected to the housing wall. The ceiling wall extends along a datum plane parallel to the surface of the printed circuit board. A high speed airflow can be generated within the fan housing. The airflow promotes the heat radiation from the printed circuit board. An electrically conductive wiring pattern extending over the surface of the printed circuit board may further promote the heat radiation from the printed circuit board.
Abstract:
A multi-layer printed circuit board (PCB) routes signal traces on internal signal layer(s) and includes power planes on the two outermost layers. The outer layers are maintained at the same non-ground voltage level, and are electrically connected by a series of vias that circumscribe signal traces on the internal layer(s). With a preferred maximum spacing of one-tenth the wavelength of electromagnetic energy generated by the signal traces, the vias, together with the outer power planes, contain electromagnetic energy within the PCB. One or more of the outer planes may include a second power plane area maintained at a different voltage. The two power plane areas are connected by decoupling capacitors, located proximate underlying signal traces that traverse the two power plane areas.