Abstract:
To prevent harmful glass fiber powders from being produced by abrasing and wearing a circuit board and to dispense with a change in a battery minus terminal when changed to a circuit board having a different thickness. Tongue shape locking spring portions formed at both ends of a minus battery terminal comprising an elastic thin plate are inserted into locking holes of a circuit board and the minus terminal is fixed to the circuit board by a contact pressure produced by bringing the tongue shape locking spring portions into contact with inner walls of the locking holes to be elastically deformed thereby. The tongue shape locking spring portion is constituted by a pair of tongue pieces symmetrical in a left and right direction, and each tongue piece includes a horizontal extended portion and a locking hole inserting portion. The locking hole inserting portion is formed with a projection in a semicircular shape brought into contact with the inner wall of the locking hole.
Abstract:
A printed circuit board assembly employing a solder vent hole adjacent solder filled interconnect vias connecting to a conductive pallet, is disclosed. The solder vent hole allows gases to escape from an otherwise sealed cavity during solder reflow, relieving positive pressure and thereby allowing solder to flow into it. By providing an escape path for trapped air and gases generated during solder paste reflow, the out-gassing pressure and weight of the molten solder is sufficient to allow the solder paste to flow into the cavity.
Abstract:
A vent assembly (50) for an electronic control module (28) is provided. The vent assembly (50) may be adheringly coupled to a printed circuit board (38). The vent assembly (50) being adapted to prevent the ingress of moisture and permit the egress of certain gases.
Abstract:
A flexible printed circuit board (FPCB) which prevents a short circuit due to a crack in a bending portion is provided. The FPCB includes an end portion, a bending portion extended from the end portion, and a circuit portion extended from the bending portion. The improved FPCB includes a base film which is flexible and comprises a first via-hole formed adjacent to the end portion and the bending portion and a second via-hole formed adjacent to the bending portion and the circuit portion, a first conductive layer formed on an outer surface of at least the end portion and the bending portion, a cover layer formed on the first conductive layer, a second conductive layer which is formed on an inner surface of the end portion and is electrically connected to the first conductive layer through the first via-hole, and a third conductive layer which is formed on an inner surface of the extension circuit portion and is electrically connected to the first conductive layer through the second via-hole.
Abstract:
A low impedance surface-mount connector includes a length of cylindrical rod having an I-shaped cross section. The device permits interconnection by pick-and-place techniques, and the interconnection has advantageous qualities of low resistance, low inductance, mechanical compliance and ease of manufacture. A first circuit device having one or more circuit components is interconnected with a second circuit device by surface mounting such connectors on the first circuit device, providing corresponding solder pads on the second circuit device, and mounting the connectors of the first circuit device onto the pads of the second.
Abstract:
A multilayer capacitor (2) consisting of a capacitor body (1) and an interposer board (20) arranged underneath it, wherein a pair of land patterns are arranged on a front surface of the interposer board (20) for connection with a pair of terminal electrodes of the capacitor body (11) and (12), and a pair of external electrodes are arranged on a back surface of the interposer board (20) for connection with interconnect patterns (34) of a mounting board (33) by solder (35), the pair of land patterns and the pair of external electrodes being arranged on the interposer board (20) so that a direction of a line connecting the pair of land patterns and a direction of a line connecting the pair of external electrodes intersect perpendicularly.
Abstract:
A method for mounting a semiconductor device, which can decrease the occurrence rate of failures, a method for repairing a semiconductor device, which can easily repair defective solder joints, and a semiconductor device which makes those methods feasible. A substrate 1 has formed therein through-holes 7 lined on the internal walls with a wiring layer 9, and solder balls 6 are fusion-bonded to the substrate 1 in such a manner as to cover the through-holes 7. In the mounting process or in the repair process, heating probes 41 are passed through the through-holes 7 and thrust into the solder balls 6 to thereby melt the solder balls, and the heating probes are pulled out of the solder balls to let the solder balls cool down. In those processes, only the solder balls 6 can be heated, thereby averting adverse effects on the IC chip 3. In the repair process, the solder balls 6 can be restored to an initial condition free of intermetallic compounds.
Abstract:
An electronic package which includes first and second circuitized substrates secured together by a solder member which includes a first contact portion for attachment to a printed circuit board and a second contact portion used to bond the two substrates together (e.g., to form a multi-chip module). Semiconductor chips can be positioned on and electrically coupled to the formed solder members.
Abstract:
In accordance with the invention, a low impedance surface-mount connector comprises a length of cylindrical rod having an I-shaped cross section. The device permits interconnection by pick-and-place techniques, and the interconnection has advantageous qualities of low resistance, low inductance, mechanical compliance and ease of manufacture. A first circuit device having one or more circuit components is interconnected with a second circuit device by surface mounting such connectors on the first circuit device, providing corresponding solder pads on the second circuit device, and mounting the connectors of the first circuit device onto the pads of the second.
Abstract:
A display device includes an organic electrroluminescence device provided on a first substrate, conductive metallic films provided on the first substrate at such positions as not to overlap with the organic electroluminescence device, a second substrate having a plurality of holes and conductive connection portions which are provided at peripheral portions forming the holes, and solder portions charged in the holes of the second substrate and, by being melted, electrically connecting the conductive metallic films of the first substrate with the conductive connection portions of the second substrate.