Abstract:
A circuit board arrangement that is for an electronic/electromechanical apparatus and that has a mechanically actuable switch for at least two different power line voltages includes a circuit board having a polygonal cutout therethrough, which defines a plurality of polygon sides. A plurality of contact surfaces on a first side of the circuit board is provided, each such contact surface being associated with a respective polygon side of the polygonal cutout. Each of the contact surfaces is connected to an electrical conductor of a power supply unit and is positioned such that a pair of contact surfaces opposite to each other with respect to the cutout correspond to one voltage. A contact spring extends into the cutout and has a pair of spring legs respectively contacting a pair of contact surfaces positioned opposite to each other with respect to the cutout.
Abstract:
The reinforcing fibers in a printed circuit board laminate are arranged in an ordered manner to leave fiber-free zones for the formation of holes. The holes may be oblong to enhance the connection to electrical leads of components mounted on the printed circuit board. The holes may be oriented with their long dimensions transverse to the side of an electrical component, and the electrical component may have its leads correspondingly oriented, to improve wiring flexibility and allow more direct wiring paths.
Abstract:
The printed circuit board (PCB) is provided with a plurality of square connector stakes, which are pressed into the respective holes disposed in the PCB. The connector stake holes are arranged on the PCB such that a conductive pad encircles each of the connector holes. The connector holes have a cross-section that provides the required mechanical interference between the connector stakes and the connector holes to hold the stakes in place prior to soldering. At the same time, the walls of the holes are configured to limit the flux from migrating to the upper portions of the connector stakes during the wave soldering operation.
Abstract:
Individual ceramic substrates for electronic microcircuits are formed in an array having rectangular perforations which define score lines along which the array is broken to yield the individual substrates. The surfaces of the rectangular perforations are metallized and leads are attached thereto by thermocompression bonding after the array is broken. The rectangular perforations result in semi-rectangular openings around the periphery of the individual substrates, which eliminate tensile forces on the substrate during lead bonding.
Abstract:
A construction for mounting plate-like electric parts within insertion holes formed in a printed circuit board is described which has additional holes for releasing any gases formed by soldering the parts to the printed circuit board. These additional holes are formed contiguous with said insertion holes at positions spaced away from any electrodes of the plate-like electric parts.
Abstract:
A printed circuit base board comprising an insulating substrate having a thin electric circuit layer composed of an electrically conductive material on one surface is disclosed. This printed circuit base board is drilled at parts of the insulating substrate contiguous to component lead attaching land-forming portions of the electric circuit layer from the opposite surface of the printed circuit base board, while leaving the land-forming portions undrilled, so that composite lead-inserting holes having a size sufficient to insert component leads exactly therein and having one end closed on the side of the land-forming portions of the electric circuit layer and the other end opened are formed. Component leads are inserted in these component lead-inserting holes from the open ends thereof, the top ends of these component leads are extended through the land-forming portions to project the top ends of the component leads on the printed circuit base board, and these projected top ends of the component leads are soldered to the land-forming portions of the electric circuit layer.
Abstract:
A flexible circuit board, a circuit board assembly, and an electronic device are provided. The flexible circuit board includes at least a flexible dielectric layer and a first connection metal layer. The flexible dielectric layer includes a through hole extending along a thickness direction of the flexible dielectric layer. The through hole includes a middle basic hole and outer auxiliary holes. Two or more outer auxiliary holes are distributed and arranged along a circumferential direction of the middle basic hole. The middle basic hole is in communication with the two or more outer auxiliary holes. The first connection metal layer is arranged on an inner wall of the through hole and is connected to the flexible dielectric layer. The first connection metal layer includes a middle channel extending along a thickness direction.
Abstract:
A printed circuit board according to an embodiment includes a first insulating layer; a second insulating layer disposed on the first insulating layer; and a cavity formed in the first and second insulating layers; wherein the cavity includes a first portion formed in the second insulating layer; and a second portion formed in the first insulating layer; wherein the first portion has a first cross-sectional shape, and wherein the second part has a second cross-sectional shape different from the first cross-sectional shape.
Abstract:
Electronic device such as a camera for a vehicle, including: a supporting frame, a main electronic substrate, provided with at least one electric or electronic component or circuit and coupled to the supporting frame; a secondary electronic substrate, provided with at least one electric or electronic component or circuit and coupled to the supporting frame; wherein the supporting frame has at least one main projecting tab and at least one secondary projecting tab, each capable to occupy a non-twisted position or a twisted position, wherein the main projecting tab, when in the twisted position, is providing an attachment of the main electronic substrate to the supporting frame, and wherein the secondary projecting tab, when in the twisted position, is providing an attachment of the secondary electronic substrate to the supporting frame.