Abstract:
The invention provides a process of forming a continuous pattern on a surface composed of two or more surface regions, each of the regions being of a different surface energy, the process utilizing a novel ink formulation for printing on such multi-region surfaces.
Abstract:
A printed circuit board, wherein a fillet (F) is added to a portion which is a crossing (X) of wiring patterns (58b, 58c, 58d) and which forms an angle portion (C) of not larger than 90 DEG to form a wiring pattern (58). The presence of the added fillet (F) prevents a wiring pattern at the crossing (X) from becoming thin and therefore the occurrence of a broken wire, non-concentration of stress on the crossing (X) does not cause broken wire at the wiring patterns and no bubbles remain between the crossing (X) of the wiring patterns and an interlayer resin insulation layer to enhance the reliability of the printed circuit board.
Abstract:
An integrated transducer-electronics interconnection suspension (12) for a disk drive having a high data transfer rate generally above (15) Mbytes/sec between the transducer (9) and the read/write electronics. A suspension (12) supports a slider (10) to which a transducer (9) is mounted and maintains the slider (10) in close proximity to the disk surface. An integrated transducer-electronics interconnection suspension is a laminate structure having electrically conductive traces as part of the structure and connecting the transducer (9) with the read/write electronics. It can support high data transfer rates between the transducer (9) and the read/write electronics by providing means for avoiding sudden changes in the characteristic impedance of the traces to minimize signal reflection on them. The width of the traces are shaped accordingly to prevent abrupt changes in the trace impedance caused by trace bonding areas, apertures and other mechanical obstructions in the suspension. Changes in the traces' direction are gradual to avoid signal reflection. Also, a patterned electrically conductive back plane may be provided in the laminate to better control the trace characteristic impedance. Where a trace crosses above a back plane opening, lateral extensions from the trace's side edges are formed to compensate for the resulting impedance change. In addition, the traces and bonding areas are grouped by signal type, with sufficient spacing between the groups, to minimize cross-coupling of the signals.
Abstract:
An assembly for transferring RF signals from antenna contact pads on a printed circuit board includes a first printed circuit board, at least one conductive contact attached to the first printed circuit board, an RF connector attached to the first printed circuit board having a center conductor of the RF connector attached to the at least one conductive contact, and a second printed circuit board having RF circuitry and at least one contact pad. The second printed circuit board is mounted orthogonally to the first printed circuit board such that the at least one conductive contact of the first printed circuit board makes mechanical contact with the at least one contact pad on the second printed circuit board.
Abstract:
In order to counter heat propagation between adjacent sections (S n-1 , S n , S n+1 ) of a ribbon-like printed circuit board (10), said sections being individually exposed to heat between opposed border 5 lines (BL), with printed circuit board (10) including an electrically insulating substrate (12) with electrically conductive pads (14) for mounting components (L) thereon, said adjacent sections are terminated at the opposed border lines (BL) with at 10 least one electrically conductive borderline pad, which: - has a separation gap to the border line (BL), and/or - is coupled to an electrically conductive line 15 (140a) extending on substrate (12) between a first end at borderline pad (140) and a second end away from borderline pad (140). Said first end and said second end may be located at a first (D1) and at a second (D2) distances to 20 border line (BL), the second distance (D2) being longer than the first distance (D1), and/or said electrically conductive line (140a) may have a narrower cross section than the first and the second ends.
Abstract:
Electrical conductors are disclosed. More particularly, undulating electrical conductors are disclosed. Certain disclosed electrical conductors may be suitable to be disposed on flexible or stretchable substrates.
Abstract:
Embodiments are disclosed for a printed circuit board 200. An example printed circuit board includes a ground plane 202 comprising a pattern of an electrically conductive material. The example printed circuit board further includes a circuit trace 204 disposed adjacent to the ground plane, where one or more characteristics of one or more of the pattern of the electrically conductive material in the ground plane and the circuit trace vary based upon a directional change of the circuit trace.