Abstract:
A socket/adapter assembly includes a insulative support member for supporting terminals soldered to connection regions of a leadless integrated circuit (IC) package, a printed circuit board, or another intercoupling component. The insulative support member is removable/replaceable from the terminals to allow visual inspection of the solder connections between the terminals and connection regions. The terminals of the socket/adapter assembly are retained by the insulative support member before the connections soldered. The insulative support member is then removed so that the individual solder connections can be examined for defective solder joints and repaired, if necessary.
Abstract:
A ball grid array socket assembly consists of a socket body having a plurality of vias extending through the socket body between upper and lower surfaces thereof, a plurality of electrically conductive contact assemblies respectively disposed in corresponding vias, and a releasable cover assembly. Each of the contact assemblies includes a lower terminal end projecting outwardly from the lower surface of the body for engaging a terminal pad on a circuit board, and further includes an upper multi-fingered contact arrangement for engaging a ball contact of a ball grid array package. Three separate embodiments of the contact assemblies are disclosed. In use, the ball grid array package is received in assembled relation with the socket body adjacent the upper surface thereof wherein the ball contacts of the ball grid array package are received into the vias in engaging electrical communication with the upper contact ends of the contact assemblies. The multi-fingered upper ends of the contact assemblies engage the BGA ball contact at multiple points to reduce creep associated failure of the contact, while a pivoting contact body portion provides relative movement between the BGA contact ball and the circuit board substrate to reduce thermal expansion stresses. The lower end of the contact assembly may comprise a removable, pivotable post which permits visual inspection of the terminal post solder joint on the terminal pad of the circuit board.
Abstract:
A socket for connecting a first component to a circuit board. The socket includes pins for connection between the component and the board and a pair of lead frame regions, which are each electrically connected to at least one pin. Each of these regions includes a connection region for making connections to a second component. Insulative plastic is molded around the regions and defines holes through which the pins are inserted. A receptor opening is provided for receiving the second component. The first component may be an integrated circuit, the second a chip capacitor, and the socket may be a DIP socket. The capacitor may be soldered to the connection regions exposed through the receptor opening. Centering bumps may align the capacitor. The plastic may define an exposed area where each of the lead frame regions connects to respective pins, allowing for inspection of the connection between lead frame regions and respective pins.
Abstract:
An adapter that is to be conneced to contacts on a mother circuit surface. The adapter has a circuit bearing element, such as a printed circuit board, with connection sites that are connected to metalized holes opening onto its top side. Leads are anchored (e.g., by soldering) in the holes and bent down around the edge of the top side of the circuit bearing element to below it, and may be connected to the contacts on the mother circuit surface. The leads may be provided to the circuit bearing element, using lead frame elements provided in a lead frame, by bending the lead frame elements, soldering them in holes in the circuit bearing element, bending the soldered leads down around the edge of the top surface of the circuit bearing element and below it, and removing a side frame portion from the bent lead frame. Bending and cutting of the leads may be performed in a single operation with a single tool.
Abstract:
An apparatus for removing a multi-contact component installed in sockets on a circuit board. The apparatus includes at least one elongated post for providing an upward force on the lower surface of the component to remove the component from the sockets. The logitudinal axis of the post is generally normal to the lower surface of the component. At least one screw is mechanically coupled to the post so that rotation of the screw causes longitudinal movement of the post.