Abstract:
A heat dissipating flexible or resilient standoff is mechanically clamped between an electronic module and substrate, such as, PCB. The clamping arrangement comprises a heat sink compressing a thermally conductive flexible interface pad over the upper surface of the electronic module by way of mechanical linkage to the PCB. The heat dissipating flexible standoff provides a force opposing the compression force to thereby reduce stress on solder ball connections between electronic module and PCB. Thermally conductive flexible standoffs in the form of spring arrangements, such as a wire mesh, act to provide heat dissipation by both thermal conduction and thermal convection. A thermally conductive flexible polymer pad and a layer of porous metal foam may also act as thermally conductive standoffs.
Abstract:
An RF interconnect is incorporated in RF module packages for direct attachment onto a multi-layer PWB using compressible center conductor (fuzz button) interconnects. The module has circuitry operating at microwave frequencies. The module package includes a metal housing including a metal bottom wall structure. The module includes a plurality of RF interconnects, which provide RF interconnection between the package and the PWB. Each interconnect includes a feedthrough center pin protruding through an opening formed in the metal bottom wall, with isolation provided by a dielectric feedthrough insulator. The center pin is surrounded with a ring of shield pins attached to the external surface of the bottom wall of the module housing. The pins are insertable in holes formed in the PWB, and make contact with fuzz button interconnects disposed in the holes. Circuitry connects the fuzz button interconnects to appropriate levels of the PWB for grounding and RF signal conduction.
Abstract:
An improved Land Grid Array interconnect structure is provided with the use of small metal bumps on the substrate electrical contact pad. The bumps interlock with segments of the fuzz button connection and increase the physical contact surface area between the contact pad and fuss button. The improved contact reduces displacement of electrical contact points due to thermo-mechanical stress and lowers the required actuation force during assembly.
Abstract:
A heat dissipating flexible or resilient standoff is mechanically clamped between an electronic module and substrate, such as, PCB. The clamping arrangement comprises a heat sink compressing a thermally conductive flexible interface pad over the upper surface of the electronic module by way of mechanical linkage to the PCB. The heat dissipating flexible standoff provides a force opposing the compression force to thereby reduce stress on solder ball connections between electronic module and PCB. Thermally conductive flexible standoffs in the form of spring arrangements, such as a wire mesh, act to provide heat dissipation by both thermal conduction and thermal convection. A thermally conductive flexible polymer pad and a layer of porous metal foam may also act as thermally conductive standoffs.
Abstract:
An RF interconnect is incorporated in RF module packages (50) for direct attachment onto a multi-layer PWB (100) using compressible center conductor (fuzz button) interconnects. The module has circuitry operating at microwave frequencies. The module package includes a metal housing (52) including a metal bottom wall structure (54). The module includes a plurality of RF interconnects, which provide RF interconnection between the package (50) and the PWB (100). Each interconnect includes a feedthrough center pin (72) protruding through an opening formed in the metal bottom wall, with isolation provided by a dielectric feedthrough insulator (74). The center pin is surrounded with a ring of shield pins (76) attached to the external surface of the bottom wall of the module housing. The pins are insertable in holes (116a, 116b) formed in the PWB (100), and make contact with fuzz button interconnects (130, 132) disposed in the holes (116a, 116b). Circuitry (148, 150) connects the fuzz button interconnects (130, 132) to appropriate levels (120, 122, 124) of the PWB signal conduction.
Abstract:
A retainer board (25, 27, 28) having at least one hole (10) in which a wire button contact (5) is inserted, wherein the hole (10) is plated and at least one conductor (20) is connected to the plated hole for providing outside access. Moreover a method for testing stacked circuit boards are disclosed comprising the steps of detachably arranging at least two circuits boards (11, 12, 29), testing the individual functionality of the circuit boards (11, 12) and if approved, assembling the circuit boards (11, 12) and the first retainer board (25, 27, 28), and asserting whether the overall functionality of the arrangement is approved.
Abstract:
An RF interconnect is incorporated in RF module packages (50) for direct attachment onto a multi-layer PWB (100) using compressible center conductor (fuzz button) interconnects. The module has circuitry operating at microwave frequencies. The module package includes a metal housing (52) including a metal bottom wall structure (54). The module includes a plurality of RF interconnects, which provide RF interconnection between the package (50) and the PWB (100). Each interconnect includes a feedthrough center pin (72) protruding through an opening formed in the metal bottom wall, with isolation provided by a dielectric feedthrough insulator (74). The center pin is surrounded with a ring of shield pins (76) attached to the external surface of the bottom wall of the module housing. The pins are insertable in holes (116a, 116b) formed in the PWB (100), and make contact with fuzz button interconnects (130, 132) disposed in the holes (116a, 116b). Circuitry (148, 150) connects the fuzz button interconnects (130, 132) to appropriate levels (120, 122, 124) of the PWB signal conduction.
Abstract:
A retainer board (25, 27, 28) having at least one hole (10) in which a wire button contact (5) is inserted, wherein the hole (10) is plated and at least one conductor (20) is connected to the plated hole for providing outside access. Moreover a method for testing stacked circuit boards are disclosed comprising the steps of detachably arranging at least two circuits boards (11, 12, 29), testing the individual functionality of the circuit boards (11, 12) and if approved, assembling the circuit boards (11, 12) and the first retainer board (25, 27, 28), and asserting whether the overall functionality of the arrangement is approved.
Abstract:
In an exemplary method, three dimensional printing forms a micro lattice truss structure with a first end formed in contact with a conductive area on a PCB so that the truss structure is adhered to the conductive area due to the three dimensional printing. The truss structure extends outward from the PCB and has a distal end. The truss structure is formed with resiliency so that the truss structure maintains structural integrity during end-to-end compression. The resiliency of the micro lattice truss structure enables the truss structure to return to substantially its uncompressed length when the compression is removed. The truss structure is conductive so that a resilient electrical connection can be formed between the conductive area of the PCB and another spaced apart surface parallel with the PCB when the distal end of the truss structure is in contact with and compressed by the other surface.