Abstract:
A printed circuit board for connectors in symmetrical communications and data systems engineering distribution systems, which includes a pair of substantially parallel circuit board tracks on a front face thereof arranged substantially congruently with a pair of substantially parallel circuit board tracks of a back face of the printed circuit board, and wherein one of the pair of tracks on the back face crosses over the other track of the pair by means of two through-hole platings, which are electrically interconnected on the front face through an interconnecting circuit board track.
Abstract:
A disk drive has an electrical interconnect for coupling one or more conductors provided on an actuator arm to a flexible connector. The interconnect consists of one or more tabs extending beyond a peripheral edge of the actuator arm and one or more slots formed on the flexible connector to receive the tabs. After the tabs are inserted into the corresponding slots, the tabs and flexible connector define L-shaped joints. Solder beads are deposited in these L-shaped joints to electrical couple the actuator arm to the flexible connector.
Abstract:
A method of forming conductive end portions on a flexible circuit member having a dielectric layer (e.g., polyimide) with at least one conductive element (e.g., copper) thereon. The method comprises the steps of forming (e.g., punching) an opening through both dielectric and conductive element, providing (e.g., additive plating) an electrically conducting layer on the opening's internal surface, providing (e.g., electroplating) a plurality of dendritic elements on the conducting layer's surface, and thereafter removing (e.g., punching) a portion of the dielectric and conductive element such that the formed dendritic elements (e.g., palladium) project from the flexible circuit's conductive ends.
Abstract:
An electrical assembly for a removable printed circuit board, wherein the printed circuit board is mounted on a plate and spaced from the plate. Electrical devices, particularly power devices, are mounted on the plate and electrically connected to the printed circuit board by a terminal providing for a flexible high current interface in the form of a deformable bridge interface connector which is inserted into the printed circuit board to provide a circuit connection to the power device. The deformable bridge interface connector is formed so as to permit three directional movement of the printed circuit board, a positive low resistance high current connection to the power devices and which can be disconnected by unscrewing screws connecting the bridge with a terminal post which is connected to the power device.
Abstract:
A low impedance surface connector is arranged on a printed board (10) with printed contacts (1-6) formed by the printed conductors. The contacts (2, 3; 5, 6) for the ground and the sheath are situated in conducting relationship symmetrically on both sides of the signal contact (1; 4) in the plane of the printed board surface (11, 12).
Abstract:
A lens barrel incorporating electric parts such as motors. The lens barrel has a double-sided printed circuit board disposed such that its major plane extend substantially orthogonally to the optical axis. Chip elements such as circuit elements are mounted on the front side of the double-sided printed circuit board while flexible connecting members for connection to the electrical parts are provided on the rear side of the double-sided printed circuit board. A land for allowing electrical check of electric circuit is also provided on the rear side of the double-sided printed circuit board.
Abstract:
A structure of joining two printed circuit boards with solder. A reserve solder layer is applied on a pattern of first joint leads of the printed circuit on a base plate of the first board. A pattern of high thermal conductivity similar to the pattern of second joint leads of the second printed circuit board, is formed on the opposite or back surface of the base plate thereof substantially superposed with the second joint leads. To join the first and second boards, the second board is turned upside down and then the second joint lead pattern is put on the solder layer in registry with the first joint lead pattern of the first board. And it is at a point on each patch of the thermal conductivity pattern that heat is then applied thereto to obtain the structure between the joint leads of the two printed circuit boards.
Abstract:
Arrays of first and second electrodes extending in mutual registration on opposite faces of the same substrate to an edge portion thereof are mutually interconnected by a plurality of electrically conductive deposits extending across that edge portion. These conductive deposits are distributed along the edge portion in a pattern including a recurring deposit width smaller than the smallest spacing between any adjacent two electrodes of either of the first and second electrodes, alternating with a recurring deposit spacing smaller than the smallest width of any of the first and second electrodes.
Abstract:
A simple method of completely metallizing terminal pins in a pattern-like arrangement. The pins protrude from the side edge of a printed circuit board. After punching out the terminal pins, there are left elevated connecting parts between the pins which then together with the connecting parts receive a metal coating. Then these connecting parts are punched off in order to interrupt the electric connection between the terminal pins.