Abstract:
A transmission line has a signal electrode formed on one surface of a flexible printed circuit, and a ground electrode formed on the other surface of the flexible printed circuit. A connection terminal has signal terminals formed on both the surfaces of the flexible printed circuit and electrically connected to each other through a via hole, and ground terminals formed on both the surfaces of the flexible printed circuit and electrically connected to each other through the via hole. The signal terminal on the surface, on which the ground electrode is formed, is formed such that at least a width in an end portion on the transmission line side is narrower than a width of a part of the signal terminal on the surface, on which the signal electrode is formed, to be at the same position when the flexible printed circuit is seen in a plan view.
Abstract:
An assembly provides a dual function for mounting a port connector on a circuit board and also secures a capacitor to the circuit board. The assembly includes the circuit board and a monolithic plastic frame having a flange, a snap structure, a capacitor cradle, and a socket section. The flange has a fastening structure for fastening the frame to the circuit board. The snap structure for a snap-in attachment of the port connector to the frame is arranged near an end edge of the circuit board. The capacitor cradle for holding a cylindrical capacitor is formed adjacent to the snap structure and is elevated from the circuit board by an air gap. The socket section bears socket contacts for receiving capacitor contact leads.
Abstract:
Probe includes a transducer, a PCB having a pattern part contacting the transducer via face-to-face contact, and a bonding member bonding the transducer to the pattern part of the PCB. The bonding part of the PCB is provided with the pattern part to increase a bonding area of the bonding part and to allow the bonding member to contact not only a metal layer of the bonding part but also an electrical insulation part thereof, thereby improving a bonding force between the transducer and the PCB. As a result, the transducer can be reliably bonded to the PCB, so that performance of the transducer can be prevented from being deteriorated due to defective connection between the PCB and the transducer.
Abstract:
An integrated circuit board includes a bridging filtering capacitor, a bypass capacitor, a thermistor, and a varistor. The integrated circuit board further includes an electrolytic capacitor set having a plurality of electrolytic capacitors, which are arranged in parallel and adjacent to each other, and a mounting frame for grouping the electrolytic capacitors. The present invention uses the above elements to reduce the vertical height, the horizontal width, and the occupied area. Therefore, the overall dimension of the circuit board can be reduced to make the electronic devices smaller, especially for thin electronic devices such as LCD TVs and screens.
Abstract:
Disclosed herein arc a printed circuit board (PCB) and a probe including the same. The probe includes a transducer, a PCB having a pattern part contacting the transducer via face-to-face contact, and a bonding member bonding the transducer to the pattern part of the PCB. The bonding part of the PCB is provided with the pattern part to increase a bonding area of the bonding part and to allow the bonding member to contact not only a metal layer of the bonding part but also an electrical insulation part thereof, thereby improving a bonding force between the transducer and the PCB. As a result, the transducer can be reliably bonded to the PCB, so that performance of the transducer can be prevented from being deteriorated due to defective connection between the PCB and the transducer.
Abstract:
An assembly including an electromagnetic relay and a circuit board. The electromagnetic relay includes a body having a lateral surface and a bottom surface, and a plurality of terminals protruding outward from the lateral surface of the body. The terminals respectively have distal portions extending beyond the bottom surface of the body. The circuit board is provided with a relay-mount surface. The electromagnetic relay is mounted on the relay-mount surface in an orientation such that the bottom surface of the body is opposed to the relay-mount surface, and the distal portions of the terminals being fixed to the circuit board. Each terminal is formed from a flat plate element and has a shape angled in a width direction of the flat plate element. The body has a height defined in a direction orthogonal to the relay-mount surface of the circuit board and corresponding to a length of a shortest edge of the lateral surface, the shortest edge being shorter than any of edges of the bottom surface.
Abstract:
A constant-temperature type crystal oscillator includes: a crystal unit; an oscillator output circuit; a temperature control circuit; and a circuit substrate, on which circuit elements are installed. A principal surface of the crystal unit is installed so as to face one side board plane of the circuit substrate with interposing a first heat conducting resin, and the heating resistors are installed to be thermally coupled to the crystal unit via a second heat conducting resin. The principal surface of the crystal unit adheres to the one side board plane of the circuit substrate with interposing the first heat conducting resin. The heating resistors are installed on the one side board plane of the circuit substrate so as to sandwich the lead wires including a portion between the pair of lead wires of the crystal unit, and the heating resistors surround an outer circumference of the crystal unit.
Abstract:
A resist having a predetermined thickness is formed on a printed circuit board except for portions of the printed circuit board that oppose a convex portion of a component when the component is mounted on the printed circuit board. A silk screen printed layer having a predetermined thickness is formed on the resist. Thereafter, a concave portion of the component is bonded to the silk screen printed layer using double coated tape having a predetermined thickness. The component is mounted such that the convex portions of the component oppose the portions of the printed circuit board that do not have a resist formed thereon. The sum of the thicknesses of the resist, the silk screen printed layer and the double coated tape is larger than a height difference between the concave portion and the convex portion of the component.
Abstract:
Methods and apparatus for accessing a high speed signal routed on a conductive trace on an internal layer of a printed circuit board (PCB) using high density interconnect (HDI technology) are provided. The conductive trace may be coupled to a microvia (μVia) having a conductive dome disposed above the outer layer pad of the μVia. In-circuit test (ICT) fixtures or high speed test probes may interface with the conductive dome to test the high speed signal with decreased reflection loss and other parasitic effects when compared to conventional test points utilizing plated through-hole (PTH) technology.
Abstract:
A stand-off mounting apparatus includes an insulative carrier for off-board mounting of leaded or surface-mount components, particularly large temperature-sensitive discrete components such as capacitors. The carrier has a component-mounting surface that is elevated relative to the circuit board, and is positioned with respect to the circuit board such that the circuit board area under the mounting surface of the carrier is available for the placement of smaller non-temperature-sensitive components. The off-board components are mounted on the component-mounting surface of the carrier, and the carrier may include support features for providing additional mechanical support for the components. Electrical leads for electrically coupling the elevated components to the circuit board may be insert-molded in the carrier, or may be inserted into plated through-holes in the carrier.