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1439 results about "High capacitance" patented technology
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High capacitance can also be the intended result of designing the cable to have extremely low characteristic impedance, characteristic impedance being approximately equal to the (square root of (inductance per unit length divided by capacitance per unit length)).
Nano-scaled graphene plate nanocomposites for supercapacitor electrodes
ActiveUS7623340B1Increase specific surface area and electrical conductivityMaterial nanotechnologyElectrolytic capacitorsCapacitancePolymer science
A preferred embodiment of the present invention is a meso-porous nanocomposite material comprising: (A) nano-scaled graphene platelets, wherein each of the platelets comprises a sheet of graphite plane or multiple sheets of graphite plane, and the platelets have a thickness no greater than 100 nm (preferably smaller than 10 nm) and an average length, width, or diameter no greater than 10 μm (preferably smaller than 500 nm); and (B) an electrically conducting binder or matrix material attached or bonded to the platelets to form the nanocomposite material having liquid accessible pores, which provide a surface area greater than about 100 m2 / gm, preferably greater than 500 m2 / gm, and most preferably greater than 1000 m2 / gm. Also disclosed is a capacitor that includes at least an electrode comprising such a meso-porous nanocomposite material. A supercapacitor featuring such a nanocomposite exhibits an exceptionally high capacitance value.
Owner:SAMSUNG ELECTRONICS CO LTD +1
Metal capacitor and method of making the same
ActiveUS8114734B2Increase capacitanceAvoid delaySemiconductor/solid-state device detailsSolid-state devicesCapacitanceInterconnection
Owner:MARLIN SEMICON LTD
Methods and systems for placement and routing
ActiveUS20090254874A1Influence optimizeImprove performanceCAD circuit designSoftware simulation/interpretation/emulationElectrical resistance and conductanceCapacitance
Techniques for placement of integrated circuit elements include global placement, detailed placement, timing closure, and routing. The integrated circuit is described by a netlist specifying interconnections of morphable devices. The detailed placement uses, for example, Simultaneous Dynamical Integration, wherein the morphable-devices correspond to nodes influenced by forces, including timing forces. The timing forces are derived, for example, from a timing graph; path delay; slack; and drive resistance of the elements. The timing closure uses timing-driven buffering and timing-driven resizing to reduce maximum delay and / or transition time, and / or to fix hold time. Nets having high capacitance and / or fanout, and timing critical nets are preferentially processed. Timing-driven buffering applies buffering solutions to segments of route trees, combines solutions of adjoining segments, and prunes sets of solutions. Timing-driven resizing morphably replaces selected elements with upsized versions thereof.
Owner:CALLAHAN CELLULAR L L C
Touch sensor with force-actuated switched capacitor
InactiveUS20120092279A1Internal/peripheral component protectionDigital data authenticationEngineeringHigh capacitance
This disclosure provides apparatus, systems and methods of fabricating force-sensitive switches. In some implementations, an array of force-sensitive switches and local capacitors of a combined sensor device may be used to connect the local capacitor into associated projected capacitive touch (PCT) detection circuitry. In some implementations, each capacitor may be formed with a thin dielectric layer to achieve a high capacitance increase when the force-sensitive switch is closed, e.g., by the pressing of a stylus or finger. In some implementations, the same PCT detection circuitry can be used to detect changes in mutual capacitance when touched with a finger (touch mode) and changes in sensel capacitance when the force-sensitive switch is depressed (stylus or fingerprint mode).
Owner:SNAPTRACK
Flexible asymmetric electrochemical cells using nano graphene platelet as an electrode material
InactiveUS20110183180A1Excellent specific capacitanceLarge specific surface areaElectrochemical generatorsHybrid capacitor separatorsPlateletGraphene
A flexible, asymmetric electrochemical cell comprising: (A) A sheet of graphene paper as first electrode comprising nano graphene platelets having a platelet thickness less than 1 nm, wherein the first electrode has electrolyte-accessible pores; (B) A thin-film or paper-like first separator and electrolyte; and (C) A thin-film or paper-like second electrode which is different in composition than the first electrode; wherein the separator is sandwiched between the first and second electrode to form a flexible laminate configuration. The asymmetric supercapacitor cells with different NGP-based electrodes exhibit an exceptionally high capacitance, specific energy, and stable and long cycle life.
Owner:NANOTEK INSTR GRP LLC
Process for producing nano-scaled graphene platelet nanocomposite electrodes for supercapacitors
ActiveUS20090092747A1Increase the areaImprove conductivityElectrolytic capacitorsHybrid capacitor electrodesHigh capacitanceCvd graphene
A process for producing meso-porous nanocomposite electrode comprising nano-scaled graphene platelets. The process comprises: (A) providing nano-scaled graphene platelets, wherein each of the platelets comprises a single graphene sheet or a stack of multiple graphene sheets, and the platelets have an average thickness no greater than 100 nm (preferably less than 5 nm and most preferably less than 2 nm in thickness); (B) combining a binder material, the graphene platelets, and a liquid to form a dispersion; (C) forming the dispersion into a desired shape and removing the liquid to produce a binder-platelet mixture; and (D) treating the binder material under a desired temperature or radiation environment to convert the binder-platelet mixture into a meso-porous nanocomposite electrode, wherein the platelets are bonded by the binder and the electrode has electrolyte-accessible pores characterized in that the nanocomposite has a surface area greater than about 100 m2 / gm (preferably greater than 200 m2 / gm, more preferably greater than 500 100 m2 / gm, and most preferably greater than 1,000 m2 / gm). A supercapacitor featuring such a nanocomposite exhibits an exceptionally high capacitance value.
Owner:SAMSUNG ELECTRONICS CO LTD +1
Supercapacitor with high energy density
InactiveUS6762926B1Sufficient energy densityLow costHybrid capacitor separatorsMultiple fixed capacitorsCapacitanceHigh energy
The energy content of supercapacitor is determined by its capacitance value and working voltage. To attain a high capacitance and a high voltage, several pieces of electrodes and separators are spirally wound with edge sealing to form a bipolar supercapacitor in cylindrical, oval or square configuration. While the winding operation effectively provides a large surface area for high capacitance, the bipolar packaging instantly imparts a unitary roll a minimum working voltage of 5V on using an organic electrolyte. The bipolar roll is a powerful building block for facilitating the assembly of supercapacitor modules. Using containers with multiple compartments, as many bipolar rolls can be connected in series, in parallel or in a combination of the two connections to fabricate integrated supercapacitors with high energy density as required by applications.
Owner:GAINIA INTELLECTUAL ASSET SERVICES
High-temperature capacitors and methods of making the same
High-temperature, multiple-layer polymer (MLP) capacitors with a stacked electrode arrangement are disclosed. The capacitor electrodes are separated by a polymer dielectric that is stable at high temperatures. In some embodiments, the polymer dielectric also has a high permittivity and is filled with high-permittivity nanoparticles, which enables the capacitor to achieve a very high capacitance density.
Owner:GENERAL ELECTRIC CO
Process for producing nano-scaled graphene platelet nanocomposite electrodes for supercapacitors
ActiveUS7875219B2Increase the areaImprove conductivityHybrid capacitor electrodesElectrolytic capacitorsGrapheneHigh capacitance
A process for producing meso-porous nanocomposite electrode comprising nano-scaled graphene platelets. The process comprises: (A) providing nano-scaled graphene platelets, wherein each of the platelets comprises a single graphene sheet or a stack of multiple graphene sheets, and the platelets have an average thickness no greater than 100 nm (preferably less than 5 nm and most preferably less than 2 nm in thickness); (B) combining a binder material, the graphene platelets, and a liquid to form a dispersion; (C) forming the dispersion into a desired shape and removing the liquid to produce a binder-platelet mixture; and (D) treating the binder material under a desired temperature or radiation environment to convert the binder-platelet mixture into a meso-porous nanocomposite electrode, wherein the platelets are bonded by the binder and the electrode has electrolyte-accessible pores characterized in that the nanocomposite has a surface area greater than about 100 m2 / gm (preferably greater than 200 m2 / gm, more preferably greater than 500 100 m2 / gm, and most preferably greater than 1,000 m2 / gm). A supercapacitor featuring such a nanocomposite exhibits an exceptionally high capacitance value.
Owner:SAMSUNG ELECTRONICS CO LTD +1
MEMS tunable capacitor based on angular vertical comb drives
InactiveUS7085122B2Appreciates the drawbacks inherent in lateral drive MEMS capacitorsIncrease tuning rangeMultiple-port networksMechanically variable capacitor detailsCapacitanceComb finger
A MEMS tunable capacitor with angular vertical comb-drive (AVC) actuators is described where high capacitances and a wide continuous tuning range is achieved in a compact space. The comb fingers rotate through a small vertical angle which allows a wider tuning range than in conventional lateral comb drive devices. Fabrication of the device is straightforward, and involves a single deep reactive ion etching step followed by release and out-of-plane assembly of the angular combs.
Owner:RGT UNIV OF CALIFORNIA
Fibril composite electrode for electrochemical capacitors
InactiveUS20020008956A1Improve electrochemical performanceReadily and highly dispersible in polar solventsNon-fibrous pulp additionNanotechComposite electrodeCarbon nanofiber
Composite electrodes comprising carbon nanofibers (fibrils) and an electrochemically active material are provided for use in electrochemical capacitors. The fibril composite electrodes exhibit high conductivity, improved efficiency of active materials, high stability, easy processing, and increase the performance of the capacitor. A method for producing the composite electrodes for use in electrochemical capacitors is also provided.
Owner:HYPERION CATALYSIS INT
Method of formation and charge of the negative polarizable carbon electrode in an electric double layer capacitor
InactiveUS6706079B1Protecting/adjusting hybrid/EDL capacitorDouble layer capacitorsCapacitanceHydrogen
A method of formation and charge of a negative polarizable electrode of an electric double layer capacitor. The method can be used for manufacturing of high capacitance capacitors utilizing the energy of the electric double layer. The methods achieve hydrogen evolution on carbonaceous materials using very negative potentials. The methods provide an EDL capacitor, employing an aqueous electrolyte, with improved specific energy. The methods may also ensure the hermeticity of the capacitor. The methods include pretreating the electric double layer capacitor by keeping the negative polarizable electrode at a desired minimum potential prior to use. Desirably, the minimum potential ranges from about -0.25 to about -1.2 V vs. a reference hydrogen electrode.
Owner:WAINWRIGHT D WALKER
Polymer gel electrolyte, secondary cell, and electrical double-layer capacitor
InactiveUS20020102464A1Large capacityWide operating temperature rangeNon-metal conductorsHybrid capacitor electrolytesPolymer capacitorCapacitance
A polymer gel electrolyte includes an electrolyte solution composed of a plasticizer with at least two carbonate structures on the molecule and an electrolyte salt, in combination with a matrix polymer. Secondary batteries made with the polymer gel electrolyte can operate at a high capacitance and a high current, have a broad service temperature range and a high level of safety, and are thus particularly well-suited for use in such applications as lithium secondary cells and lithium ion secondary cells. Electrical double-layer capacitors made with the polymer gel electrolyte have a high output voltage, a large output current, a broad service temperature range and excellent safety.
Owner:NISSHINBO IND INC
Method and structure for high capacitance memory cells
InactiveUS6927122B2Increase capacitanceMaterial nanotechnologyNanoinformaticsCapacitanceHigh capacitance
A method and structure for high capacitance memory cells is provided. The method includes forming a trench capacitor in a semiconductor substrate. A self-structured mask is formed on the interior surface of the trench. The interior surface of the trench is etched to form an array of silicon pillars. The self-structured mask is removed. Then an insulator layer is formed on the array of silicon pillars. A polycrystalline semiconductor plate extends outwardly from the insulator layer in the trench.
Owner:MICRON TECH INC
High temperature ceramic dielectric composition and capacitors made from the composition
ActiveUS8076257B1Highly desirable propertyExcellent dielectric constant/voltage characteristicFixed capacitor dielectricStacked capacitorsCapacitanceDielectric
A bismuth sodium titanate (Bi0.5Na0.5TiO3) base material is modified by the partial substitution of aliovalent A-site cations such as barium (as BaO) or strontium (as SrO), as well as certain b-site donor / acceptor dopants and sintering aids to form a multi-phase system, much like known “core / shell” X7R dielectrics based solely on BaTiO3. The resulting ceramic dielectric composition is particularly suitable for producing a multilayer ceramic capacitor (10) that maintains high dielectric constant (and thus the capability of maintaining high capacitance) over a broad temperature range of from about 150° C. to about 300° C. Such capacitors (10) are appropriate for high temperature power electronics applications in fields such as down-hole oil and gas well drilling.
Owner:FERRO CORP
A soft start circuit for PDM DC-DC switching power supply
InactiveCN101217252AGood soft start effectAvoid Inrush CurrentDc-dc conversionElectric variable regulationCapacitanceMicrocontroller
The invention discloses a soft starting circuit for a pulse width modulation DC-DC switch power, comprising a frequency splitting count module, a current threshold module, a current sampling module, a current limiting comparator, a two input or-gate, an oscillator and an RS trigger. The current in a power inductance is sampled when an external switch rectifier is conducted, and the current changes from small to big by stage by limiting the peak value of the current so as to control the step change of the duty ratio, thus leading the output voltage to increase by stage gradually, avoiding surge current in starting procedure and realizing the soft starting function. The invention has the advantages of integrating to the inside of large scale integrated circuit without high capacitance in the outside or a microcontroller to control, limiting the load current directly with good soft starting effect and being suitable for a voltage control mode and a current control mode; the circuit is simple correspondingly by adopting a current gating network; the soft starting time can be regulated automatically according to different loads.
Owner:HUAZHONG UNIV OF SCI & TECH
Magnetic dipole antenna structure and method
InactiveUS6567053B1Small sizeLow costSimultaneous aerial operationsRadiating elements structural formsCapacitanceEngineering
The spiral sheet antenna allows a small efficient antenna structure that is much smaller than the electromagnetic wavelength. It achieves the small size by introducing a high effective dielectric constant through geometry rather than through a special high dielectric constant material. It typically includes a rectangular cylinder-like shape, with a seam. The edges of the seam can overlap to make a high capacitance, or they can make a high capacitance by simply having the edges of the seam very close to each other. The high capacitance serves the same role as a high dielectric constant material in a conventional compact antenna.
Owner:KYOCERA AVX COMPONENTS (SAN DIEGO) INC
Tantalum powder for capacitors
InactiveUS6689187B2Suitable cohesive strengthUniform porosityElectrolytic capacitorsTransportation and packagingPorosityCapacitance
The tantalum powder for capacitors of the present invention has a specific surface area SB as determined by the BET method of 1.3 m<2> / g or more, and an SB / SF ratio between the specific surface area SB as determined by the BET method and the specific surface area SF determined by the FSS method of 4 to 10. This tantalum powder not only has a large specific surface area SB, but also has suitable cohesive strength and uniform porosity.Consequently, a solid state electrolytic capacitor having high capacitance and low ESR can be obtained by providing with a capacitor anode formed from a sintered body of this tantalum powder. In addition, whether or not this tantalum powder is suitable for the production of a tantalum capacitor having high capacitance and low ESR can be determined easily and reliably by evaluating the tantalum powder using the specific surface area SB as determined by the BET method and the SB / SF ratio between SB and the specific surface area SF determined by the FSS method.
Owner:GLOBAL ADVANCED METALS JAPAN
Polymer battery pack and method of manufacturing the same
ActiveUS20060266542A1High strengthImprove reliabilityInsulated cablesCell component detailsCapacitanceEngineering
A polymer battery pack includes: a bare cell having main walls and sub-walls; a protection circuit member which is electrically connected to the bare cell; a resin sheath which encloses the sub-walls of the bare cell in such a way that the main walls are exposed to the outside; and finishing tape attached to the main walls of the bare cell. A frame case may be interposed between the bare cell and the resin sheath. In the battery pack, a strong resin sheath and finishing tape or a frame case are engaged with the bare cell, thereby reinforcing the strength of the bare cell and improving the reliability of the bare cell. Also, the battery pack does not require a separate space for the supersonic welding, and thus can receive a bare cell of high capacitance. A method of manufacturing the polymer battery pack includes forming a bare cell, forming a core pack by positioning and electrically interconnecting a protection circuit member with the bare cell, and molding a resin sheath accommodating the resin sheath enclosing the core pack and the electrode terminals of the protection circuit member are exposed to the outside. A frame case can be formed and engaged with the bare cell to be included in the core pack.
Owner:SAMSUNG SDI CO LTD
Tantalum powder for capacitors
InactiveUS20020050185A1Suitable cohesive strengthUniform porosityElectrolytic capacitorsTransportation and packagingPorosityCapacitance
The tantalum powder for capacitors of the present invention has a specific surface area SB as determined by the BET method of 1.3 m2 / g or more, and an SB / SF ratio between the specific surface area SB as determined by the BET method and the specific surface area SF determined by the FSS method of 4 to 10. This tantalum powder not only has a large specific surface area SB, but also has suitable cohesive strength and uniform porosity. Consequently, a solid state electrolytic capacitor having high capacitance and low ESR can be obtained by providing with a capacitor anode formed from a sintered body of this tantalum powder. In addition, whether or not this tantalum powder is suitable for the production of a tantalum capacitor having high capacitance and low ESR can be determined easily and reliably by evaluating the tantalum powder using the specific surface area SB as determined by the BET method and the SB / SF ratio between SB and the specific surface area SF determined by the FSS method.
Owner:GLOBAL ADVANCED METALS JAPAN
MEMS tunable capacitor based on angular vertical comb drives
InactiveUS20050013087A1Increase tuning rangeAppreciates the drawbacks inherent in lateral drive MEMS capacitorsMultiple-port networksMechanically variable capacitor detailsCapacitanceComb finger
A MEMS tunable capacitor with angular vertical comb-drive (AVC) actuators is described where high capacitances and a wide continuous tuning range is achieved in a compact space. The comb fingers rotate through a small vertical angle which allows a wider tuning range than in conventional lateral comb drive devices. Fabrication of the device is straightforward, and involves a single deep reactive ion etching step followed by release and out-of-plane assembly of the angular combs.
Owner:RGT UNIV OF CALIFORNIA
Method and structure for high capacitance memory cells
InactiveUS20050026360A1Increase capacitanceIncrease in capacitance levelMaterial nanotechnologyNanoinformaticsCapacitanceHigh capacitance
A method and structure for high capacitance memory cells is provided. The method includes forming a trench capacitor in a semiconductor substrate. A self-structured mask is formed on the interior surface of the trench. The interior surface of the trench is etched to form an array of silicon pillars. The self-structured mask is removed. Then an insulator layer is formed on the array of silicon pillars. A polycrystalline semiconductor plate extends outwardly from the insulator layer in the trench.
Owner:MICRON TECH INC
Method for making metal capacitors with low leakage currents for mixed-signal devices
InactiveUS20050132549A1Reduce leakage currentHigh capacitance per unit areaElectrolytic capacitorsSemiconductor/solid-state device manufacturingCapacitanceMetal-insulator-metal
A method for making metal-insulator-metal (MIM) capacitors having insulators with high-dielectric-constant and sandwiched between wide-band-gap insulators resulting in low leakage currents and high capacitance per unit area is achieved. The high-k layer increases the capacitance per unit area for next generation mixed-signal devices while the wide-band-gap insulators reduce leakage currents. In a second embodiment, a multilayer of different high-k materials is formed between the wide-band-gap insulators to substantially increase the capacitance per unit area. The layer materials and thicknesses are optimized to reduce the nonlinear capacitance dependence on voltage.
Owner:TAIWAN SEMICON MFG CO LTD
Nonaqueous electrolyte for rechargeable battery, and rechargeable battery with nonaqueous electrolyte
InactiveCN101652894AExcellent discharge load characteristicsImprove featuresFinal product manufactureCell electrodesHigh current densityHigh temperature storage
This invention provides a nonaqueous electrolyte which is excellent in discharge load properties, as well as in high-temperature storage stability, cycling characteristics, high capacitance, continuous charge properties, storage stability, gas evolution suppression in continuous charging, charge / discharge properties at a high current density, discharge load properties and the like, and a rechargeable battery with a nonaqueous electrolyte. The nonaqueous electrolyte contains a monofluorophosphate and / or a difluorophosphate and further contains a compound having a specific chemical structure orspecific properties.
Owner:MITSUBISHI CHEM CORP
Frequency selective high impedance surface
ActiveUS7136029B2Simultaneous aerial operationsAntenna supports/mountingsCapacitanceHigh capacitance
Disclosed herein are various high-impedance surfaces having high capacitance and inductance properties. One exemplary high-impedance surface includes a plurality of conductive structures arranged in a lattice, wherein at least a subset of the conductive structures include a plurality of conductive plates arranged along a conductive post so that the conductive plates of one conductive structure interleave with one or more conductive plates of one or more adjacent conductive structure. Another exemplary high-impedance surface includes a plurality of conductive structures arranged in a lattice, where the conductive structures include one or more fractalized conductive plates having either indentions and / or projections that are coextensive with corresponding projections or indentations, respectively, of one or more adjacent conductive structures. Also disclosed are various exemplary implementations of such high-impedance surfaces.
Owner:NXP USA INC
High frequency solid state switching for impedance matching
ActiveUS20130207738A1Total current dropReduce partImpedence matching networksMultiple-port networksImpedance matchingPower MOSFET
In accordance with this invention the above and other problems are solved by a switching apparatus and method that uses a switching circuit having a pair of parallel solid-state diodes (e.g., PN or PIN diodes), one of which is connected to a transistor (e.g., power MOSFET or IGBT), to switch a capacitor (or reactance element) in or out of a variable capacitance element (or variable reactance element) of an impedance matching network. Charging a body capacitance of the transistor reverse biases one of the two diodes so as to isolate the transistor from the RF signal enabling a low-cost high capacitance transistor to be used. Multiple such switching circuits and capacitors (or reactance elements) are connected in parallel to provide variable impedance for the purpose of impedance matching.
Owner:AES GLOBAL HLDG PTE LTD
High-specific-area carbon/metallic oxide composite electrode material of lithium battery, electrode and preparation methods for high-specific-area carbon/metallic oxide composite electrode material and electrode
ActiveCN102569768AImprove structural stabilityImprove uniformityCell electrodesElectrical batteryOxide composite
The invention relates to a high-specific-area carbon / metallic oxide composite electrode material of a lithium battery, an electrode and preparation methods for the high-specific-area carbon / metallic oxide composite electrode material and the electrode. A metallic oxide is deposited on high-specific-area carbon powder by using an atomic layer deposition method, and the mass ratio of a metallic oxide film to high-specific-area carbon is between 70 percent and 90 percent. The invention also provides a method for preparing the high-specific-area carbon / metallic oxide composite electrode material by using the atomic layer deposition method, and a method for preparing the electrode by using the high-specific-area carbon / metallic oxide composite electrode material. The high-specific-area carbon / metallic oxide composite electrode material has a high-mass-ratio characteristic, and the lithium battery prepared from the high-specific-area carbon / metallic oxide composite electrode material has a long cycle life and high capacitance stability.
Owner:柔电(武汉)科技有限公司
High frequency solid state switching for impedance matching
ActiveUS8436643B2Reliability increasing modificationsMultiple-port networksImpedance matchingEngineering
Owner:AES GLOBAL HLDG PTE LTD
High capacitance trench capacitor
ActiveUS20120061798A1Solid-state devicesSemiconductor/solid-state device manufacturingCapacitanceEngineering
A dual node dielectric trench capacitor includes a stack of layers formed in a trench. The stack of layers include, from bottom to top, a first conductive layer, a first node dielectric layer, a second conductive layer, a second node dielectric layer, and a third conductive layer. The dual node dielectric trench capacitor includes two back-to-back capacitors, which include a first capacitor and a second capacitor. The first capacitor includes the first conductive layer, the first node dielectric layer, the second conductive layer, and the second capacitor includes the second conductive layer, the second node dielectric layer, and the third conductive layer. The dual node dielectric trench capacitor can provide about twice the capacitance of a trench capacitor employing a single node dielectric layer having a comparable composition and thickness as the first and second node dielectric layers.
Owner:GLOBALFOUNDRIES US INC
High performance, high capacitance gain, jack connector for data transmission or the like
InactiveUS6964587B2Enhanced crosstalk compensation featureSimple and economical to produceLine/current collector detailsCoupling device detailsDielectricCapacitance
Owner:BEL FUSE MACAO COMML OFFSHORE
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