| Patent application number | Description | Published |
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| 20100300207 | PRESSURE SENSOR FOR HARSH MEDIA SENSING AND FLEXIBLE PACKAGING - MEMS pressure sensing elements, the fabrication methods of the sensing elements, and the packaging methods using the new sensing elements are introduced to provide a way for a harsh media absolute pressure sensing and eliminating the negative effects caused by the gel used in the prior art. The invention uses vertical conductive vias to electrically connect the enclosed circuit to the outside, and uses a fusion bond method to attach a cap with the embedded conductive vias over a device die having a circuit for example a piezoresistive Wheatstone bridge to sense pressure. New packaging methods comprise a) a two-pocket housing structure and using a surface mounting method to attach a new sensing element into one pocket by a ball grid array (BGA), and b) a single pocket structure and using conventional die attach and wire bonding. Both methods can be used for harsh media pressure sensing but without the negative effects caused by the gel in prior art. | 12-02-2010 |
| 20110023618 | LOW PRESSURE SENSOR DEVICE WITH HIGH ACCURACY AND HIGH SENSITIVITY - Pressure non-linearity in a low pressure sensor device formed from a silicon diaphragm with an embedded piezoresistive transducer is reduced by using a shallow boss or thin stiffener on an ultra-thin diaphragm while the pressure sensitivity of the device is increased with corner trenches. | 02-03-2011 |
| 20110132085 | Pressure Sensor Device with Breakwater to Reduce Protective Gel Vibration - A piezoresistive pressure sensor that uses a protective gel to protect the piezoresistive device is susceptible to lead wire failure by vibration-induced waves in the protective gel. Such waves can be reduced and the device made more robust by the use of three-dimensional structures in the gel, which are configured to reduce and/or re-direct vibration-induced pressure waves in the gel. The structures are referred to as “breakwaters” in that they protect lead wires and lead wire connections from wave fronts and the damage that wave-induced pressure on the lead wires causes. | 06-09-2011 |
| 20110232389 | Grooved Structure For Die-Mount And Media Sealing - Dual piezoresistive transducers formed into a single silicon die, are anodically bonded to a pedestal. Two separate pressure ports extend through a plastic housing. The port openings inside the housing are surrounded by a groove having a shape and size that accepts the pedestal. A thin, liquid adhesive is deposited into the groove and allowed to level out. The pedestal is placed into the adhesive and embeds itself therein. Adhesive overflow into the ports is avoided by dimensioning the groove and depositing an amount of adhesive that will fill the groove but not overflow when the pedestal is placed therein. Once the adhesive cures, the adhesive bond strength is greater due to the adhesive being in shear relative to the groove side walls and pedestal sidewalls. The grooved structure provides an apparatus and methodology for precise die mounting and media sealing. | 09-29-2011 |
| 20110278682 | Optimized Bonding Wire - Any two segments of a wire bonded on two bond pads at different elevations can be distinguished by a stationary node (or zero-displacement) during its second-mode vibration. In order to boost the natural frequency of such a bond wire to avoid a second-mode resonance occurring at the lowest frequency in the in-plane vibration, a wire can be optimized by connecting two equalized (shortest possible) wire segments to replace a wire consisting of a larger segment and a shorter segment. The purpose is to re-distribute a larger vibration movement in the longer segment with a lower stiffness of an arbitrary bond wire to two smaller equalized segments of an optimized wire to reduce an in-plane vibration to significantly improve the wire natural frequency and reliability in a harsh vibration environment such as over 30 kHz. | 11-17-2011 |
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| 20090098356 | Flexible Penetration Resistant Article - The invention relates to a flexible, penetration resistant article comprising a plurality of fibrous layers including continuous filament yarns, and having an areal density of less than about 4.4 kilograms per square meter. At least one of the plurality of fibrous layers has a fiber with a tenacity of at least about 30 grams per decitex and a continuous filament yarn having a linear density of less than about 1100 decitex. | 04-16-2009 |
| 20090136706 | Multiaxial Fabric With Strain-Responsive Viscous Liquid Polymers - The invention concerns multiaxial fabrics comprising a first layer comprising a plurality of first yarns being substantially parallel in a first direction, a second layer comprising a plurality of second yarns being substantially parallel in a second direction and skew or off-set with respect to the first yarns, transverse yarn interlaced transversely within the layers; wherein each layer is coated with a high viscosity polymer that has a Tg in the range of about −40 to about 0° C., and a zero shear viscosity of about 2×10 | 05-28-2009 |
| 20090188014 | Matrix Free Non-Woven Layer of Polypyridazle Short Fiber - Provided are non-woven constructions and fabrics comprising polypyridazole short fiber; said short fiber characterized by an average filament tenacity of at least 15 grams per denier (gpd); an average filament modulus of at least 500 gpd; an average filament density of at least 1.6 g/cc; an average filament length of 30 to 100 mm; and an average filament denier per filament (dpf) of 0.1 to 10; wherein the construction is substantially free of matrix. | 07-30-2009 |
| 20090271903 | Multiaxial Fabric - The invention concerns multiaxial fabrics comprising at least one layer of nonwoven fabric, thermoplastic film or thermoset film, a first layer comprising a plurality of first yarns being substantially parallel in a first direction, a second layer comprising a plurality of second yarns being substantially parallel in a second direction and skew or off-set with respect to the first yarns, and transverse yarn interlaced transversely within the layers wherein each layer may be arranged in any sequential order and optionally coated with a high viscosity polymer that has a Tg in the range of about −40 to about 0° C., and a zero shear melt viscosity of about 2×10 | 11-05-2009 |
| 20100143683 | Fiber Network Layers and Flexible Penetration Resistant Articles Comprising Same - The present invention is directed to a fiber network layer for use in penetration resistant articles having a first plurality of yarns and a second plurality of yarns, each of the first and second yarns arranged in a first direction parallel or substantially parallel to the other first and second yarns and a third plurality of yarns, each of the third yarns arranged in a second direction parallel or substantially parallel to the other third yarns; the second direction transverse to the first direction. The third yarns and either the first yarns or the second yarns are made of a first polymer. Each of the first, second and third yarns having a tenacity of at least 15 g/dtex. The layers are such that either (i) the second yarns are made of a second polymer which is different than the first polymer, or (ii) the first yarns have a different average linear density than the average linear density of the second yarns, or (iii) the first and second yarns comprise multifilament yarns with filaments and the filaments of the first yarns have an average linear density different from the filaments in the second yarns, or (iv) combinations thereof. | 06-10-2010 |
| 20100151234 | Penetration Resistant Composite and Article Comprising Same - Penetration resistant composites and articles that are lightweight and ultraviolet light stable. One penetration resistant composite has a plate and a plurality of fibrous layers disposed adjacent at least one major surface of the plate. At least one of the fibrous layers includes a polymer fiber that is ultraviolet light stable. The composite has an areal density of less than about 25 kilograms per square meter, and is non-penetratable in accordance with standard NIJ-0101.04 level III dated September 2000. | 06-17-2010 |
| 20110203450 | BALLISTIC RESISTANT BODY ARMOR ARTICLES - The present invention relates to body armor articles for resisting ballistic objects. The articles comprise woven fabric layers and sheet layers. The woven fabric layers are made from yarns having a tenacity of at least 7.3 grams per dtex and a modulus of at least 100 grams per dtex. The sheet layers comprise non-woven random oriented fibrous sheets and/or non fibrous films. The woven fabric layers and the sheet layers are stacked together comprising a first core section which includes at least two repeating units of, in order, at least one of the woven fabric layers then at least one of the sheet layers. The sheet layers comprise 0.5 to 30 wt % of the total weight of the article. | 08-25-2011 |
| 20120024137 | COMPOSITES AND BALLISTIC RESISTANT ARMOR ARTICLES CONTAINING THE COMPOSITES - A composite useful in a ballistic resistant armor article comprises a first nonwoven layer comprising a first plurality of yarns the yarns comprising a first plurality of para-aramid filaments, the first plurality of yarns arranged parallel with each other and a second nonwoven layer comprising a second plurality of yarns comprising a second plurality of para-aramid filaments, the second plurality of yarns arranged parallel with each other. The first plurality of yarns of the first layer have an orientation in a direction that is different from the orientation of the second plurality of yarns in the second layer. The yarns have an elongation at break of 3.6 to 5.0 percent. The composite further comprises a thermoset or thermoplastic binding resin in the region of the interface between the two layers and a viscoelastic resin coating at least portions of external surfaces of the first and second pluralities of yarns. | 02-02-2012 |
| 20120088062 | MULTIAXIAL POLYETHYLENE FABRIC AND LAMINATE - Provided is a multiaxial fabric comprising a first layer comprising a first layer comprising substantially parallel resin-free polyethylene yarns oriented in a first direction; a second layer comprising substantially parallel resin-free polyethylene oriented in a second direction, the first and second directions being skew with respect to each other; a layer, interposed between and in contact with each of the first and second layers, and comprising a thermoplastic or thermoset film; and a yarn interlaced transversely among each of the layers of the multiaxial fabric. | 04-12-2012 |
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| 20080197326 | SYNTHESIS OF NANOFIBERS OF POLYANILINE AND SUBSTITUTED DERIVATIVES - Novel, simple methods are presented directed to the synthesis of nanofibers of polyaniline and substituted derivatives. The production of these fibers is achieved via various methods by controlling the concentration of aniline monomer or substituted aniline derivatives or an oxidant in the reaction medium and maintaining said concentration at a level much lower than conventional polyaniline synthesis methods. Methods are disclosed relating to the use of a permeable membrane to control the release of a monomer and/or oxidant as well as a bulk polymerization method. | 08-21-2008 |
| 20100099782 | SUSPENSION POLYMERIZATION AND FOAMING OF WATER CONTAINING ACTIVATED CARBON-NANO/MICROPARTICULATE POLYMER COMPOSITES - Synthesis of polystyrene and/or other thermoplastic polymers or polymer blends which, for example, contain activated carbon and/or bamboo carbon carrying a co-blowing agent such as water and/or at least one of 1-dimensional, 2-dimensional, and 3-dimensional nano/micro-materials in suspension polymerization without using the inverse emulsion process. CO | 04-22-2010 |
| 20110229706 | ALIGNED NANOSTRUCTURED POLYMERS - Novel, simple methods are presented directed to the synthesis of aligned nanofibers of polyaniline and substituted derivatives on a substrate. The production of these fibers is achieved via various methods by controlling the concentration of aniline monomer or substituted aniline derivatives or an oxidant in the reaction medium and maintaining said concentration at a level much lower than conventional polyaniline synthesis methods. Methods are disclosed relating to the use of a permeable membrane to control the release of a monomer and/or oxidant as well as a bulk polymerization method. | 09-22-2011 |
| 20120035353 | ALIGNED NANOSTRUCTURED POLYMERS - Novel, simple methods are presented directed to the synthesis of aligned nanofibers of polyaniline and substituted derivatives on a substrate. The production of these fibers is achieved via various methods by controlling the concentration of aniline monomer or substituted aniline derivatives or an oxidant in the reaction medium and maintaining said concentration at a level much lower than conventional polyaniline synthesis methods. Methods are disclosed relating to the use of a permeable membrane to control the release of a monomer and/or oxidant as well as a bulk polymerization method. | 02-09-2012 |
