摘要:
The chip stack of semiconductor chips with enhanced cooling apparatus includes a first chip with circuitry on a first side and a second chip electrically and mechanically coupled to the first chip by a grid of connectors. The apparatus further includes a thermal interface material pad placed between the first chip and the second chip, wherein the thermal interface material pad includes nanofibers aligned parallel to mating surfaces of the first chip and the second chip and nanofibers aligned perpendicular to mating surfaces of the first chip and the second chip
摘要:
The chip stack of semiconductor chips with enhanced cooling apparatus includes a first chip with circuitry on a first side and a second chip electrically and mechanically coupled to the first chip by a grid of connectors. The apparatus further includes a thermal interface material pad placed between the first chip and the second chip, wherein the thermal interface material pad includes nanofibers aligned parallel to mating surfaces of the first chip and the second chip and nanofibers aligned perpendicular to mating surfaces of the first chip and the second chip.
摘要:
A method, system and apparatus for preferential cooling of an electrical circuit board via a cradle having a cooling shell. An enhanced connector cradle enables the secure and precise placement of a connector on a circuit board by using a cooling component which selectively enables only the connector leads to reach reflow temperature levels. The cradle aligns and securely connects the circuit board to the connector via a comb structure of the cradle to form a single connector unit. Heat is applied to the single connector unit to initiate bond formation. The cradle selectively minimizes the heat to the circuit board and other board components by enabling the circulation of de-ionized water through the cooling component during the heating process. As a result, the cradle restricts reflow temperature levels to the connector leads. The cradle mechanism is removed from the board after the connector is securely bonded to the board.
摘要:
The exemplary embodiments of the present invention provide a method and system for aligning graphite nanofibers in a thermal interface material to enhance the thermal interface material performance. The method includes preparing the graphite nanofibers in a herringbone configuration, and dispersing the graphite nanofibers in the herringbone configuration into the thermal interface material. The method further includes applying a magnetic field of sufficient intensity to align the graphite nanofibers in the thermal interface material. The system includes the graphite nanofibers configured in a herringbone configuration and a means for dispersing the graphite nanofibers in the herringbone configuration into the thermal interface material. The system further includes a means for applying a magnetic field of sufficient intensity to align the graphite nanofibers in the thermal interface material.
摘要:
The chip stack of semiconductor chips with enhanced cooling apparatus includes a first chip with circuitry on a first side and a second chip electrically and mechanically coupled to the first chip by a grid of connectors. The apparatus further includes a thermal interface material pad placed between the first chip and the second chip, wherein the thermal interface material pad includes nanofibers aligned parallel to mating surfaces of the first chip and the second chip. The method includes creating a first chip with circuitry on a first side and creating a second chip electrically and mechanically coupled to the first chip by a grid of connectors. The method further includes placing a thermal interface material pad between the first chip and the second chip, wherein the thermal interface material pad includes nanofibers aligned parallel to mating surfaces of the first chip and the second chip.
摘要:
An impact sensor includes a piezoelectric transducer operatively connected to a chromic device. The chromic device includes a chromic material that changes from a first color state to a second color state in response to electric power generated by the piezoelectric transducer when exposed to a given level of impact force. The chromic material is bistable so that the chromic material remains in the second color state for a significant amount of time. An impact force to which the sensor has been subjected may be quantified by observing the chromic device. In one embodiment, the chromic material is an electrochromic material, such as a viologen, that changes through a color gradient of light transmission states from the first color state to the second color state. A printed color gradient may be used to aid in quantifying the impact force. In another embodiment, the chromic device includes a thermochromic material.
摘要:
A method and circuit are provided for implementing reduced signal degradation for fiber optic modules, and a design structure on which the subject circuit resides. Responsive to a detected signal input, an optical misalignment calculation is performed. A voltage potential for a lens shape control is selected responsive to the optical misalignment calculation. An optical signal loss calculation and threshold compare are performed. Responsive to the optical signal loss calculation less than the threshold, the lens shape and voltage potential are fixed. A fluidic lens provides variable lens shape responsive to the selected voltage potential being applied to the fluidic lens,
摘要:
A mechanism for providing thermal compensation when measuring surface topography at an elevated temperature using a non-contact vibration transducer, such as a laser Doppler vibrometer (LDV). Thermal compensation is provided to a detector output signal to correct for thermal diffraction of a reflected portion of a beam of radiant energy directed at a surface of a test object. The thermal compensation is based on a calculated deviation between the detector output signal r2 at an elevated temperature and the detector output signal r1 at approximately room temperature. In one embodiment, the thermal compensation mechanism calculates a stationary signal r3(t) which represents the detector output signal without noise and corrected for thermal diffraction at the elevated temperature according to the following equation: r 3 ( t ) = lim T → ∞ 1 / T ∫ - t / 2 + t / 2 r 2 * ( t ) * r 2 * ( t + Δ t ) ⅆ t , wherein T represents the total number of spectrums measured at the elevated temperature at multiple times upon which the compensation is based, and wherein r2*=r2−r2(baseline).
摘要:
An electronic module is provided in which a chip is disposed over a substrate and electrically connected to the substrate by a plurality of electrical connect structures disposed between the chip and the substrate. A heat distributor, fabricated of a thermally conductive material, is disposed between the chip and the substrate and sized to extend beyond an edge of the chip to facilitate conduction of heat laterally out from between the chip and substrate. The heat distributor includes openings sized and positioned to allow the electrical connect structures to pass through the heat distributor without electrically contacting the heat distributor. The heat distributor is electrically isolated from the electrical connect structures, the chip and the substrate. In one implementation, the heat distributor physically contacts a thermally conductive enclosure of the electronic module to facilitate conduction of heat from between the chip and substrate to the enclosure.
摘要:
A method and structure for implementing enhanced dimensional stability with a graphite nanotube hybrid socket. A socket housing wall includes a plurality of aligned graphite nanofibers. The plurality of aligned graphite nanofibers distributing heat and providing enhanced dimensional stability. For example, the plurality of aligned graphite nanofibers more evenly distributes heat when the socket is undergoing solder reflow processes, thereby reducing strain.