Abstract:
According to exemplary embodiments, a tapered surface interconnect is formed on a printed circuit board (PCB). A compliant pin of an electrical connector may be coupled to the tapered surface interconnect and soldered thereto. The surface interconnect may be formed by drilling through one or more layers of the PCB. The depth of the surface interconnect may be shorter than a height or a thickness of the PCB. The surface interconnect may have a tapered side wall to allow for a better fit with a tapered compliant pin. The inclination of the side wall of the surface interconnect may be linear or concave. The intersection between the tapered sidewall and the bottom of the surface interconnect may be rounded to minimize pin insertion issues and may allow for easier solder flux evacuation. The compliant pin may be soldered into place upon being coupled to the tapered surface interconnect.
Abstract:
A method of assembling a light source comprises the steps of inserting multiple lead wires of a light emitting element into an insertion hole formed in a circuit board from one side of the circuit board at once, striking tips of the multiple lead wires with corresponding multiple guides formed on a circumference of a pressing device serving as a jig from the other side of the circuit board, moving the pressing device toward the one side from the other side of the circuit board, and in a first stage guiding the multiple lead wires to corresponding terminals formed in an inner wall of the insertion hole of the circuit board, respectively.
Abstract:
A method for solderless electrical press-fit contacting of electrically conductive press-fit pins in circuit boards include: providing a circuit board having a thickness, at least one electrical conductor path, and a contacting opening guided perpendicularly through the circuit board and having a metallized inner wall; providing an electrically conductive press-fit pin having a longitudinal axis and having a press-fit region suitable for press-fitting into the contacting opening and having a substantially round cross section; and press-fitting the press-fit pin into the contacting opening by applying onto the press-fit pin a force acting along the longitudinal axis of the press-fit pin, press-fitting being assisted by the application of ultrasound acting on the press-fit pin.
Abstract:
An improved passive electronic stacked component is described. The component has a stack of individual electronic capacitors and a first lead attached to a first side of the stack. A second lead is attached to a second side of the stack. A foot is attached to the first lead and extends inward towards the second lead. A stability pin is attached to one of the foot or the first lead.
Abstract:
A heat-release configuration includes a printed board on which a semiconductor component is mounted, a heat-release plate which is mounted on the semiconductor component, and configured to diffuse heat generated by the semiconductor component; and a supporting clamp which is mounted on the heat-release plate, and configured to fix the heat-release plate to the printed board via a hole provided in the printed board, the supporting clamp including a sectional L-shape in a horizontal direction having two flat surfaces substantially orthogonal to each other, the supporting clamp having on a lower side of each of the flat surfaces a leading end portion which is inserted into the hole of the printed board and a locking claw which is formed in the leading end portion and projects outside the L-shape.
Abstract:
A holding member, for an electronic component inserted into a through hole provided in an electronic circuit board which includes a plate-shaped base that is fixed to the electronic component, a first leg and a second leg. The first leg extends from the base, and is inserted into the through hole. The first leg has a catch that projects laterally and outwardly with respect to an inserting direction in which the first leg is inserted into the through hole and locked with an edge of the through hole after the first leg is inserted. The second leg extends from the base and is inserted into the through hole together with the first leg. The second leg elastically deforms when the second leg comes into contact with an inner surface of the through hole, presses the first leg to an opposite side inner surface of the through hole, and elastically holds the catch in a state in which the catch is locked with the edge of the through hole after the second leg is inserted.
Abstract:
Automatic clinging leads of an electric device are provided for an unassisted mounting on thru-holes of a printed circuit board. Each of the leads of the device has three continuous right-angled sections including a longitudinal proximal end section extending from the terminal region of the electric element, a latitudinal distal end section extending at right angle with respect to the proximal end section, and a bent midsection for connecting the proximal and distal end sections at the diametrically opposite right angle to the angle between the proximal and distal end sections to provide a generally laterally extending lead with three alternating bends between the three sections. The device leads can be inserted into the thru-holes of the circuit board through a 90-degree swivel motion that causes a secure flush cling of the leads and in turn a low profile mounting of the device onto the circuit board around thru-holes.
Abstract:
Contact structures exhibiting resilience or compliance for a variety of electronic components are formed by bonding a free end of a wire to a substrate, configuring the wire into a wire stem having a springable shape, severing the wire stem, and overcoating the wire stem with at least one layer of a material chosen primarily for its structural (resiliency, compliance) characteristics. A variety of techniques for configuring, severing, and overcoating the wire stem are disclosed. In an exemplary embodiment, a free end of a wire stem is bonded to a contact area on a substrate, the wire stem is configured to have a springable shape, the wire stem is severed to be free-standing by an electrical discharge, and the free-standing wire stem is overcoated by plating. A variety of materials for the wire stem (which serves as a falsework) and for the overcoat (which serves as a superstructure over the falsework) are disclosed. Various techniques are described for mounting the contact structures to a variety of electronic components (e.g., semiconductor wafers and dies, semiconductor packages, interposers, interconnect substrates, etc.), and various process sequences are described. The resilient contact structures described herein are ideal for making a “temporary” (probe) connections to an electronic component such as a semiconductor die, for burn-in and functional testing. The self-same resilient contact structures can be used for subsequent permanent mounting of the electronic component, such as by soldering to a printed circuit board (PCB). An irregular topography can be created on or imparted to the tip of the contact structure to enhance its ability to interconnect resiliently with another electronic component. Among the numerous advantages of the present invention is the great facility with which the tips of a plurality of contact structures can be made to be coplanar with one another. Other techniques and embodiments, such as wherein the falsework wirestem protrudes beyond an end of the superstructure, or is melted down, and wherein multiple free-standing resilient contact structures can be fabricated from loops, are described.
Abstract:
An interconnection contact structure assembly including an electronic component having a surface and a conductive contact carried by the electronic component and accessible at the surface. The contact structure includes an internal flexible elongate member having first and second ends and with the first end forming a first intimate bond to the surface of said conductive contact terminal without the use of a separate bonding material. An electrically conductive shell is provided and is formed of at least one layer of a conductive material enveloping the elongate member and forming a second intimate bond with at least a portion of the conductive contact terminal immediately adjacent the first intimate bond.
Abstract:
Contact structures are formed by building a core structure on a substrate and over coating the core structure with a material that is harder or has a greater yield strength than the material of the core structure. The core structure may be formed by attaching a wire to the substrate and spooling the wire out from a spool. While spooling the wire out, the spool may be moved to impart a desired shape to the wire. The wire is severed from the spool and over coated. As an alternative, the wire is not over coated. The substrate may be an electronic device, such as a semiconductor die.