Abstract:
This disclosure describes a procedure for soldering an insulated wire where the wire end features a U- or V-shaped hook with one bending point and is introduced such into the soldering hole of a printed circuit board that the bending point protrudes from the other side of the soldering hole.
Abstract:
Cables having interspersed co-planar signal and ground wires are terminated at a planar circuit board by stapling the cable to the circuit board with a bus member, mechanically and electrically connecting the signal wires to signal wire termination sites which are downstream from the bus member, folding the ground wires back over the bus member, and mechanically and electrically connecting the ground wires to the bus member.
Abstract:
A method is disclosed for the temporary retention of insulated electrical leads by a printed circuit board preparatory to permanent electrical and mechanical attachment. Also disclosed is apparatus for forming the leads for said retention. The lead has a metallic wire therethrough with a residuum of elasticity. The printed circuit board consists of an insulative sheet with a plurality of selectively interconnected metallic electrical terminals each having a hole therethrough smaller in diameter than the outside diameter of the electrical lead, but larger in diameter than the wire by a factor of appreciably greater than 2. The method according to the invention comprises stripping the insulation from an end of the lead to provide a predetermined length of wire projecting from the abutment of the insulation formed by the stripping. The wire is then folded to form a narrow J-hook, the folded width of which is appreciably greater than the diameter of the hole. The point of the fold is selected such that the distance between the tip of the wire and the abutment of the insulation is substantially equal to the thickness of the board. The tip of the wire is offset to form a spur. When the retentive configuration is inserted into the hole, the J-hook is constricted to provide entry into the hole and thereafter, because of its residuum or elasticity, expands. The abutment of the insulation limits the distance of entry of the wire into the hole, and the spur, together with the expansion of the J-hook, inhibits withdrawal of the lead from the hole.
Abstract:
An electronic device comprising a package comprising an encapsulated electronic chip, at least one at least partially exposed electrically conductive carrier lead for mounting the package on and electrically connecting the electronic chip to a carrier, and at least one at least partially exposed electrically conductive connection lead, and an electronic member stacked with the package so as to be mounted on and electrically connected to the package by the at least one connection lead.
Abstract:
An electric apparatus for connecting to a first printed circuit includes a second printed circuit, which includes a first surface substantially parallel to a first plane and a second surface substantially parallel to a second plane perpendicular to the first plane. The first surface includes a first area and the second surface includes a smaller second area. The second printed circuit includes conductive traces in a layer of the second printed circuit. The electric apparatus further includes first and second conductive pins including first and second longitudinal axes, respectively. First and second notches in the second printed circuit include respective first and second openings through the second surface adapted to receive portions of the first and second pins and adapted to electrically connect the pins to first and second respective ones of the conductive traces. The first and second longitudinal axes are installed substantially parallel to the first plane.
Abstract:
Micro-vias that are conventionally used for vertical connections in wire or circuit boards may be used for an entirely different purpose; the micro-vias may be used in the creation of solder joints to initiate the controlled formation of voids that increase the reliability of the solder joints.
Abstract:
A heat conduction board, include a heat dissipation member; a heat conduction member which is arranged on the heat dissipation member and conducts a heat thereto; a lead frame which is formed in a wire pattern shape, and is arranged on the heat conduction member; and a printed circuit board which mounts a second electronic component for controlling a first electronic component; wherein the first electronic component and the printed circuit board are soldered to the lead frame.
Abstract:
A method and system for attaching LEDs to circuitry which would protect the LEDs from heat damage and allows for individual LEDs to be removed.
Abstract:
The present invention relates to a light emitting module, which comprises: a main body; a common terminal, in which one side of the common terminal is exposed to the main body and a weldless coupling structure is disposed on the bottom of the common terminal; at least a control terminal, in which one side of the control terminal is exposed to the main body and a weldless coupling structure is disposed on the bottom of the control terminal; and at least a light emitting device. When assembling the components mentioned above, the common terminal and the control terminal are inserted into a through hole of a printed circuit board (PCB), such that the structure can be inlaid into the through hole and a better contact is obtained by its elasticity. Accordingly, the light emitting module can be fastened on the PCB.
Abstract:
A device comprising a workpiece (401) with a surface (401a) including a center (402) and an array of bond pads (420), further an array of interconnects (405) of uniform height. Each of these interconnects comprises an elongated wire loop, which has both wire ends (440, 450) attached to one of the bond pads, respectively, and its major diameter (460) approximately normal to the workpiece surface. A substantial number of the loops has an orientation approximately normal to the vector (410) from the workpiece center to the respective bond pad; this number includes more than 30% of the loops located along the workpiece perimeter and more than 10% of the total loops. Examples of workpieces are a semiconductor device, an integrated circuit (IC) chip, and a semiconductor device package.