Abstract:
Integrated circuits (202) utilizing standard commercial packaging are arranged on a printed circuit board (104) to allow the production of 1-Gigabyte and 2-Gigabyte capacity memory modules (200). A first row of integrated circuits (202) is oriented in an opposite orientation to a second row of integrated circuits (202). The integrated circuits (202) in a first half of the first row and in the corresponding half of the second row are connected via a signal trace to a first register (210). The integrated circuits (202) in a second half of the first row and in the corresponding half of the second row are connected to a second register (220). Each register processes a non-contiguous subset of the bits in each data word.
Abstract:
An article and method for making and repairing connections between first and second circuits, such as flex circuits. The article (10) includes: a flexible dielectric substrate (12) having first and second edges 14/16, and a plurality of conductive circuit traces (18) arranged on or within the substrate, wherein each of the traces extends from proximate the first edge (14) to proximate the second edge (16). Each of the circuit traces (18) includes: a first connection feature (20) disposed proximate the first edge (14); a second connection feature (22) disposed proximate the second edge (16); and at least one third connection feature (24) disposed between the first and second edges (14/16). Each of the first, second, and third connection features (20/22/24) is a plated through hole, a plated blind via, or a mounting pad. This article (10) may be used to connect together the first and second circuits (50/60) using the first and second connection features (20/22), such as by soldering. If either of the two circuits needs to be subsequently detached (e.g., because of a component failure), the article (10) may be cut so as to present a set of third connection features (24) to which a new replacement circuit may be connected.
Abstract:
Transparent simulated components (4) are inserted into a test board (1) in an insertion machine for inserting such electrical components into printed-circuit boards at defined points. The simulated components are provided with scale-type markings (5). The test board has reference marks (3) with scales which are parallel with these scales and overlap said markings (4). The two vernier-type scales enable scale displacements to be read more clearly in the case of deviations from the ideal position.
Abstract:
A power signal transmission structure and a design method are provided. The power supply signal transmission structure is adapted for a circuit board having a first surface and a second surface opposite to the first surface, and the power signal transmission structure includes a first power electrode, a second power electrode, and a plurality of vias. The first power electrode is disposed on the first surface and has a plurality of power pad regions for receiving a power signal. The second power electrode is disposed on the second surface. The vias penetrate the circuit board to electrically connect the first power electrode and the second power electrode. The vias are arranged in accordance with the current direction of the power signal to balance the current received by the vias.
Abstract:
In an inverter control apparatus in which a control circuit board is fixed by use of pin-like terminals provided in a power board, the breakage of the pin-like terminals is prevented. The power board 160 is provided with a plurality of signal transmission terminals 210a, 210b, 220a, 220b for signal transmission to and from the control circuit board 150 and for grounding along each of a pair of opposed sides, the control circuit board 150 is electrically connected to the plurality of signal transmission terminals 210a etc. and is fixed by soldering to the plurality of signal transmission terminals 210a etc., and the plurality of signal transmission terminals 210a etc. are arranged along each of the pair of sides in a plurality of rows.
Abstract:
A printed wiring board is provided which comprises: a first substrate (31) on which a plurality of pads (15, 17) to be connected to a connector is arranged to form a front array and a rear array in two rows; a second substrate (32) that is laminated on the first substrate (31) and formed with first wirings (9) connected to first pads (15) of the front array and second wirings (11) connected through vias to second pads (17) of the rear array; engageable parts (28, 29) that are to be engaged with engagement parts of the connector; and one or more reinforcement layers (R1, R2) that are provided at the frontward side in the connecting direction (I) than the engageable parts (28, 29) of the first substrate (31) and/or the second substrate (32). The wirings (9, 11) each have a part formed to have a constant width along the inserting direction to the connector and an expanded-width part expanded to have a wider width than the constant width in the inserting direction of the connector. The expanded-width parts are provided at locations corresponding to respective pads (15, 17). The expanded-width parts include first expanded-width parts having approximately the same shape as that of the first pads (15) and second expanded-width parts having approximately the same shape as that of the second pads (17).
Abstract:
A printed wiring board is provided which comprises: a first substrate (31) on which a plurality of pads (15, 17) to be connected to a connector is arranged to form a front array and a rear array in two rows; a second substrate (32) that is laminated on the first substrate (31) and formed with first wirings (9) connected to first pads (15) of the front array and second wirings (11) connected through vias to second pads (17) of the rear array; engageable parts (28, 29) that are to be engaged with engagement parts of the connector; and one or more reinforcement layers (R1, R2) that are provided at the frontward side in the connecting direction (I) than the engageable parts (28, 29) of the first substrate (31) and/or the second substrate (32). The wirings (9, 11) each have a part formed to have a constant width along the inserting direction to the connector and an expanded-width part expanded to have a wider width than the constant width in the inserting direction of the connector. The expanded-width parts are provided at locations corresponding to respective pads (15, 17). The expanded-width parts include first expanded-width parts having approximately the same shape as that of the first pads (15) and second expanded-width parts having approximately the same shape as that of the second pads (17).
Abstract:
The invention relates to a contact-making device for producing an electrical contact between a printed circuit board (150) accommodated in an electronics box (2) and an electrical component part (160, 162, 163), wherein the printed circuit board (150) has at least one conductor track or conductor area (F1, F2, F3, F4) having at least one contact opening (152) for receiving at least one contact pin (137; 144) arranged on the electronic component part (160, 162, 163). For simplified and permanently safe contact-making, provision is made for the printed circuit board (150) to have at least one conductor area (F1, F2, F3, F4), which has a multiplicity of contact openings (152) arranged in a regular grid pattern, said contact openings being configured to receive different electrical component parts (160, 162, 163) with in each case a different number of contact pins (137; 138; 144).