Abstract:
Systems and methods are described for integrated cooling system. A method includes: circulating a liquid inside a flexible multi-layer tape; and transporting heat between a heat source that is coupled to the flexible multi-layer tape and a heat sink that is coupled to the flexible multi-layer tape. A method includes installing a flexible multi-layer tape in an electrical system, wherein the flexible multi-layer tape includes a top layer; an intermediate, layer coupled to the top layer; and a bottom layer coupled to the intermediate layer, the intermediate layer defining a closed loop circuit for a circulating fluid. An apparatus includes a flexible multi-layer tape, including: a top layer; an intermediate layer coupled to the top layer; and a bottom layer coupled to the intermediate layer, wherein the intermediate layer defines a closed loop circuit for a circulating fluid.
Abstract:
An improved process is provided for aligning and bonding channel and heater substrates together to form a thermal ink jet printhead. A thick film polyimide layer is formed over the heater substrate and is patterned to provide a plurality of tacking pits. The channel substrate has alignment holes formed in peripheral edge areas. A UV curable adhesive is deposited into the alignment hole and UV irradiated to produce a cured tacking column in the underlying pits formed in the thick film layer. Due to the sloping walls of the etched alignment recess, some portion of the adhesive is not fully cured and, during a subsequent curing process, tends to initiate a capillary flow along the interface between channel substrate and the thin film layer. This flow, in prior art designs, sometimes proceeds to the point where the adhesive is squeezed out onto electrode connections formed on an adjacent heater substrate. The formation of the pits serves to interrupt and trap the flow of the uncured adhesive, thus, preventing further flow and eliminating subsequent contamination.
Abstract:
The present invention discloses a thermally and electrically conductive adhesive material comprising a hardened adhesive, and a non-solidified filler containing a liquid metal dispersed in separate spaced regions of the adhesive. The hardened adhesive provides a mechanical bond whereas the filler provides continuous thermal and electrical metal bridges, each bridge extending through the adhesive and contacting the bonded surfaces. The method includes (a) dispersing a filler containing a liquid metal into an unhardened adhesive, (b) contacting the unhardened adhesive and the filler in non-solidified state to the surfaces resulting in separate spaced regions of the non-solidified filler contacting both surfaces, and (c) hardening the adhesive.
Abstract:
A thermally and electrically conductive paste for making a detachable and compliant connection between two surfaces. The paste comprises an equilibrium mixture of an electrically conductive liquid metal and particulate solid constituents, wherein at the temperature of the paste during connection the proportions of liquid metal and particulate solid constituents remain between the ultimate liquidus and the ultimate solidus of the phase diagram of the mixture and the paste remains non-solidified. in cryogenic and low temperature environments the paste forms a hardened bond with a TCE matched to a contacted surface.
Abstract:
A fluid heat exchanger for cooling an electronic component having a housing for receiving heat from the electronic component in which the housing has a fluid inlet and an outlet at opposite ends of the housing. The cross-sectional area of the housing for conveying fluid from the inlet to the outlet decreases from the inlet to the outlet thereby reducing pressure drop without sacrificing thermal performance. The cross-sectional area may be decreased by tilting a top of the housing relative to a bottom, or providing a plurality of fins separated by channels in which the cross-sectional area of the channels decreases from the inlet to the outlet.
Abstract:
A carbonaceous particulate material is provided that is characterized by having a reversible volumetric expansion/contraction in fluid media (“VR”) of greater than or equal to (≧)3% between 4,000 psi and 10,000 psi. The porous carbonaceous particulate material of the present disclosure is also characterized by having a true density, (“PT”), of 1.2 g/cc≦PT≦2.0 g/cc, when milled to −200 mesh and has a d50 particle size distribution of about 15 μm. This is the consequence of the instant material exhibiting a high level of closed porosity with very small pores, in contrast with prior art materials that would have a wider range pore sizes for the closed pores.
Abstract translation:提供了一种碳质颗粒材料,其特征在于在4000psi至10,000psi之间具有大于或等于(≥3%)的流体介质(“VR”)的可逆容积膨胀/收缩。 本公开的多孔碳质颗粒材料的特征还在于,当研磨至-200目并具有d50粒度分布时,其真密度(“PT”)为1.2g /cc≤PT≤2.0g/ cc 约15μm。 这是现有材料表现出具有非常小孔隙的高水平闭孔率的结果,与现有技术的材料相比,该材料对于闭孔具有更宽的孔径。
Abstract:
A carbonaceous particulate material is provided that is characterized by having a reversible volumetric expansion/contraction in fluid media (“VR”) of greater than or equal to (≧)3% between 4,000 psi and 10,000 psi. The porous carbonaceous particulate material of the present disclosure is also characterized by having a true density, (“PT”), of 1.2 g/cc≦PT≦2.0 g/cc, when milled to−-200 mesh and has a d50 particle size distribution of about 15 μm. This is the consequence of the instant material exhibiting a high level of closed porosity with very small pores, in contrast with prior art materials that would have a wider range pore sizes for the closed pores.
Abstract translation:提供了一种碳质颗粒材料,其特征在于在4000psi至10,000psi之间具有大于或等于(≥3%)的流体介质(“VR”)的可逆容积膨胀/收缩。 本公开的多孔碳质颗粒材料的特征还在于,当研磨至200目并具有d50粒径时,其真密度(“PT”)为1.2g / cc和nlE; 2.0g / cc 分布约15μm。 这是现有材料表现出具有非常小孔隙的高水平闭孔率的结果,与现有技术的材料相比,该材料对于闭孔具有更宽的孔径。
Abstract:
A device is provided which is adapted to electrostatically pull a cantilever away from a conductive pad. In particular, a microelectromechanical device is provided which includes a fulcrum contact structure interposed between two electrodes spaced under a cantilever and a conductive pad arranged laterally adjacent to one of the electrodes. The cantilever may be brought into contact with the conductive pad by residual forces within the cantilever and/or an application of a closing voltage to one of the electrodes. Such a device may be adapted bring the cantilever in contact with the fulcrum contact structure by applying an actuation voltage to the other of the electrodes. In addition, the actuation voltage may deflect the cantilever away from the conductive pad. In some cases, deflecting the cantilever from the conductive pad may include releasing the closing voltage and increasing the actuation voltage subsequent to the release of the closing voltage.
Abstract:
An electronic device, such as a filter or phase shifter, for example, includes a substrate, and a MEMS capacitor on the substrate and having a plurality of selectable capacitance values. The MEMS capacitor preferably includes a lower capacitor electrode on the substrate, and a movable bridge including end portions connected to the substrate laterally adjacent the lower capacitor electrode. The movable bridge may also include a conductive medial portion between the end portions defining an upper capacitor electrode suspended above the lower capacitor electrode and being movable between an upper position and a lower position by an electrostatic force generated between the capacitor electrodes. The upper and lower positions provide respective low and high selectable capacitance values. Moreover, the movable bridge may further include at least one travel limiting portion between the end portions for engaging adjacent substrate portions to keep the upper capacitor electrode in a predetermined spaced relation from the lower capacitor electrode when in the lower position. This travel limiting feature of the MEMS capacitor is relatively easy to fabricate and avoids the sticking or stiction problem of some other types of MEMS capacitors.
Abstract:
An integrated circuit structure and method of making in which the circuit has a plurality of metal heat exchanger elements spaced from each other with their first ends secured to the structure. The first ends may be adhesively secured to an integrated circuit chip or the underlying substrate, and the heat exchanger may be hermetically attached. The method uses a compliant removable support block for attaching the plurality of individual heat exchanger elements to integrated circuit structures having variations in their elevation.