Abstract:
The present invention provides a low profile, high density electronic package for high speed, high performance semiconductors, such as memory devices. It includes a plurality of modules having high speed, impedance-controlled transmission line buses, short interconnections between modules and, optionally, driver line terminators built into one of the modules, for maintaining high electrical performance. Suitable applications include microprocessor data buses and memory buses such as RAMBUS and DDR. The modules may be formed on conventional printed circuit cards with unpacked or packed memory chips attached directly to the memory module. Thermal control structures may be included to maintain the high density modules within a reliable range of operating temperatures.
Abstract:
The present invention provides a carrier that provides improved retention to the individual contact elements resulting in LGA interposer connectors with improved manufacturability, reliability and more uniform mechanical and electrical performance. In one embodiment, the carrier, which includes upper and lower sections of dielectric material with an adhesive layer in between, includes a plurality of openings, each of which may contain an individual contact element. During assembly of the connector, once the contact elements are inserted, the adhesive layer is reflowed, thereby allowing the carrier to capture the location of the contact elements both with respect to each other as well as to the carrier. Alternately, the carrier may be implemented in a fashion that, while not including an adhesive layer to be reflowed, still provides improved retention of the individual contact elements. These embodiments may by easier to assemble, and less expensive to manufacture, especially in high volumes. Description of the processes to assemble the carrier and overall connector are also disclosed.
Abstract:
Interconnect structures for integrated circuits and semiconductor chips are disclosed which employ patterned interfaces to minimize stress migration in the interconnects. The interfaces are patterned to have regions of substantially no adhesion and other regions of good adhesion. The regions of substantially no adhesion reduce stress migration in the interconnect, while the regions of good adhesion ensure adequate thermal contact, fabricability and mechanical integrity of the interconnect structures. The patterned interfaces can be formed either by treating the surfaces of the interconnect or adjacent insulator and passivation layers, or by forming patterned interlayers of material in the interfaces. Multiple layer interconnects can also be formed which incorporate similarly patterned interfaces.
Abstract:
A high-density electrical package utilizing an array of high performance demountable electrical contacts such as UEC, T-Spring, F-Spring and their equivalent contained in a carrier in the form of an interposer between one or more components and a substrate. The carrier is made of a thermally conductive metal or contains thermally conductive metal to provide heat-spreading or dissipation functions in addition to the function of the retention and alignment of the electrical contacts. The above interposer is used for chip attach for a single chip or a stack of chips in the package. The interposer provides electrical connections through individual electrical contact to another chip or to the substrate of the package. It provides also the heat spreading or dissipation function to the chips connected thermally to a particular interposer. The interposer can further be connected thermally to an external heat spreader when necessary.
Abstract:
A high-density electrical package utilizing an array of high performance demountable electrical contacts such as UEC, T-Spring, F-Spring and their equivalent contained in a carrier in the form of an interposer between one or more components and a substrate. The carrier is made of a thermally conductive metal or contains thermally conductive metal to provide heat-spreading or dissipation functions in addition to the function of the retention and alignment of the electrical contacts. The above interposer is used for chip attach for a single chip or a stack of chips in the package. The interposer provides electrical connections through individual electrical contact to another chip or to the substrate of the package. It provides also the heat spreading or dissipation function to the chips connected thermally to a particular interposer. The interposer can further be connected thermally to an external heat spreader when necessary.
Abstract:
An electrical contact formed from a compliant folded sheet that includes a top surface, a bottom surface, a first contact edge and a second contact edge. A plurality of corrugations are formed in the top surface and the bottom surface that terminate at the first contact edge and the second contact edge. A connector system having a housing that has a plurality of through openings. A plurality of electrical contacts, each being formed from a compliant folded sheet that includes a top surface, a bottom surface, a first contact edge and a second contact edge. A plurality of corrugations are formed in the top surface and the bottom surface that terminate at the first contact edge and the second contact edge. Each of the electrical contacts is arranged within a corresponding one of the plurality of through openings such that the first contact edge is positioned outside of the through-opening in which electrical contact is positioned, and the second contact edge is positioned outside of the through-opening in which electrical contact is positioned, but spaced from the first contact edge.
Abstract:
An electrical contact formed from a plurality of interlaced and annealed wires by weaving or braiding the wires together to form a mesh, annealing the mesh, and cutting the annealed mesh so as to form a plurality of individual electrical contacts. A method for forming a precursor material for use in manufacturing an electrical contact is also provided that includes manipulating a plurality of wires so as to interlace the wires into a unitary structure. The unitary structure is then annealed. An electrical contact may then be formed from the precursor material by elastically rolling a portion of the unitary structure so as to form a tube, annealing the tube, and then cutting the unitary structure so as to release the tube thereby to form an electrical contact. An electrical contact may also be formed by folding a portion of the unitary structure so as to form one or more pleats, annealing the pleated unitary structure, and then cutting the pleated unitary structure so as to release one or more electrical contacts. The precursor material may also be formed by photo-etching a sheet of conductive material so as to form a mesh, and then annealing the mesh. A connector system may be formed including a housing defining a plurality of openings that are each filled with an electrical contact comprising a plurality of interlaced and annealed wires that have been previously either rolled or pleated.
Abstract:
An electrical contact (2) and method of making the electrical contact (2), and a connector (11) and method making the connector (11), wherein the electrical contact (2) is an electrically conducting, nonwoven mesh (60), with edges of the mesh providing multiple contact points for edgewise electrical connection of the electrical contact (2), wherein the mesh (60) is annealed while restrained in the form of the electrical contact (2) wherein the mesh (60) is free of internal elastic strain, and wherein the connector (11) retains the electrical contact (2) for edgewise connection.
Abstract:
A connector system including first housing having a first header, the first header including one or more conductive pads that are in electrical communication with a conductor. A second housing that is mateable with the first housing and includes a second header positioned on a mating face. The second header includes one or more conductive pad that are electrically engaged with a conductor and positioned in confronting relation with the one or more conductive pads of the first header. An interposer located between the first header and the second header, with a woven contact that extends continuously through the interposer toward conductive pads on the first and second headers. The interposer is movable between a first position where the woven contact is spaced away from the at least one of the conductive pads, and a second position where woven contact electrically engages one of the conductive pads.
Abstract:
An electrical contact (2) and method of making the electrical contact (2), and a connector (11) and method making the connector (11), wherein the electrical contact (2) is an electrically conducting, interlaced mesh (40), with edges of the mesh providing multiple contact points for edgewise electrical connection of the electrical contact (2), wherein the mesh (40) is annealed while restrained in the form of the electrical contact (2) wherein the mesh (40) is free of internal elastic strain, or the mesh (40) is hardened, and wherein the connector (11) retains the electrical contact (2) for edgewise connection.