300 results about "Interdigitated electrode" patented technology

The invention relates to a thin film capacitor with a carrier substrate, at least two interdigitated electrodes, and a dielectric. A staggered arrangement of at least one interdigitated electrode below the dielectric with respect to an interdigitated electrode above the dielectric results in a breakdown-resistant thin film capacitor which can be manufactured in the same production process as a standard monolayer capacitor.

A structure, apparatus and method for utilizing vertically interdigitated electrodes serves to increase the capacitor area surface while maintaining a minimal horizontal foot print. Since capacitance is proportional to the surface area the structure enables continual use of current dielectric materials such as Si3N4 at current thicknesses. In a second embodiment of the interdigitated MIMCAP structure the electrodes are formed in a spiral fashion which serves to increase the physical strength of the MIMCAP. Also included is a spiral shaped capacitor electrode which lends itself to modular design by offering a wide range of discrete capacitive values easily specified by the circuit designer.

An interdigitated electrode ferroic transducer includes a film of ferroic material electrically polarized substantially in the plane of the film; and a set of interdigitated electrodes including at least two electrodes spaced from one another on the same side of the film and disposed at the termini of the polarization field.

A portable electronic drumhead includes a sensor responsive to drumstick impacts in producing electrical signal pulses input to headphones to thereby simulate sounds of an acoustic drumhead. The sensor includes a Force Sensing Resistor (FSR) lamination coated with an electrically conductive polymer ink, a spacer lamination, and a flexible electrode lamination having on an inner surface thereof a pair of interdigitated electrodes, the electrode lamination elastically contacting the FSR lamination in response to drumstick impacts on the outer surface of the electrode lamination or FSR lamination to thus momentarily reduce electrical resistance between the electrodes. Resilient batter pads overlying the laminations muffle sounds produced by drumstick impacts. Optionally, the sensor may have an annular ring shape which may be placed concentrically on the head of an acoustic drum, the sensor having an upwardly protruding resilient bumper strikable to produce electronically synthesized rim shot sounds.

A three-dimensional micro electro-mechanical (MEMS) variable capacitor is described wherein movable comb electrodes of opposing polarity are fabricated simultaneously on the same substrate are independently actuated. These electrodes are formed in an interdigitated fashion to maximize the capacitance of the device. The electrodes are jointly or individually actuated. A separate actuation electrode and a ground plane electrode actuate the movable electrodes. The voltage potential between the two electrodes provides a primary mode of operation of the device. The variation of the sidewall overlap area between the interdigitated fingers provides the expected capacitance tuning of the device. The interdigitated electrodes can also be attached on both ends to form fixed-fixed beams. The stiffness of the electrodes is reduced by utilizing thin support structures at the ends of the electrodes. The three dimensional aspect of the device avails large surface area. Large capacitance variation and tuning ranges are obtained by independent actuation of the electrode fingers. A plurality of modes of operation of the device provides wide flexibility and greater performance advantage for the device. Upon fabrication of the device, a separate substrate with etched dielectric is used to encapsulated the device. The MEMS device is then completely encapsulated, requiring no additional packaging of the device. Further, since alignment and bonding can be done on a wafer scale, an improved device yield is obtained at a lower cost.

A back contact integrated photovoltaic cell includes a substrate having a dielectric surface and a patterned metal layer with parallel spaced alternately positive and negative electrode fingers forming an interdigitated two-terminal structure over the dielectric surface of the substrate. A dielectric filler may be in the interstices of separation between adjacent spaced parts of the patterned metal layer. Parallel spaced strips, alternately of p⁺ doped polysilicon and of n⁺ doped polysilicon, may top the positive and negative interdigitated electrode fingers, respectively, and form doped p-type active regions and n-type active regions of the integrated photovoltaic cell, spaced and isolated by a strip of undoped or negligibly doped polysilicon. An n⁻ or p⁻ doped or intrinsic semiconducting layer of at least partly crystallized silicon, forming a semiconductor region of thickness adapted to maximize absorption of photonic energy when illuminated by sunlight, may cover the interdigitated active doped regions.

A flooring system comprising a plurality of electrode pairs in contact with a metaplastic composite material. The metaplastic material is such that it locally conducts electrical current in an area where any load is applied to the metaplastic. An electric potential is applied to one or more interdigitated electrodes located at a face of the metaplastic material in line with applied loads. Larger area coverage can be obtained either by pre-installing a subsurface layer comprising of an array of interdigitated electrodes and their trace line outputs and then covering this layer with a tiling of metaplastic material sheets that is in direct contact with the array of interdigitated electrodes, or, by directly attaching one or more interdigitated electrodes and their output trace lines to an individual sections of metaplastic material and electrically interconnecting their outputs. By applying a sufficient number of interdigitated electrodes and sheets of the metaplastic material and monitoring the electrical current flowing in each interdigitated electrode so placed, it can be determined whether and where loads are being applied to the PCC flooring material and the approximate size and shape of the load.

A display device includes a first, second and third sub-pixel areas allowing light of a first, second and third main wavelengths transmitting therethrough, respectively. The first, second and third sub-pixel areas have first, second and third ratios of first, second and third electrode widths to first, second and third electrode slits of first, second and third interdigitated electrodes, respectively. When the first main wavelength is larger than the second main wavelength and the second main wavelength is larger than the third main wavelength, a difference between any two of the first, second and third ratios is less than 0.2. A first electrode slit of the first interdigitated electrode is smaller than the second electrode slit of the second interdigitated electrode, and the second electrode slit of the second interdigitated electrode is smaller than the third electrode slit of the third interdigitated electrode.

A method for electrochemical impedance spectroscopy uses interdigitated electrodes functionalized with a first species and nanoparticles functionalized with a second species that preferentially attaches to the first species. The nanoparticles are composed of a material with a dielectric constant (k value) greater than 2. The chemically functionalized electrodes are then exposed to a solution containing the chemically functionalized nanoparticles which then become immobilized on the electrodes through the attachment of the first species to the second species. The impedance spectrum is measured and an amount of the first species is then determined from the measured spectrum. Because the high-k dielectric nanoparticles increase the double-layer capacitive impedance, the sensitivity of determining the amount of the first species attached to the second species is enhanced.

A method for manufacturing an embossed surface comprising a polymer with a first glass transition temperature Tg1 comprises embossing the surface a temperature Temb; and raising the first glass transition temperature Tg1 of the embossed polymeric surface to a second glass transition temperature Tg2 such that Tg2>Temb. In another embodiment, a method for improving the release of a polymeric surface from an embossing tool comprises incorporating of one or more of fluorine atoms, silicon atoms, or siloxane segments into the backbone of polymer. The methods are particular suited for direct patterning of photoresists, fabrication of interdigitated electrodes, and fabrication of data storage media.

Methods for preparing a multi-layer acoustic transducer with reduced total electrical impedance. The methods are based on the stacking of individual piezoelectric layers with metallized surfaces to form a plate in which the metal layers are electrically connected to form interdigitated electrodes. The total electrical impedance of a multi-layer stack comprised of piezoelectric layers connected in this manner is inversely related to the square of the number of layers in the stack. This provides for better matching of the acoustic stack impedance to that of the electrical cable and improved acoustic element sensitivity.

A microfluidic device comprising independently addressable arrays of interdigitated electrodes can be used to assembly and transport large-scale microparticle structures. The device and method uses collective phenomena in a negatively polarized suspension exposed to a high-gradient strong ac electric field to assemble the particles into predetermined locations and then transport them collectively to a work area for final assembly by sequentially energizing the electrode arrays.

Provided are an interdigitated electrode (IDE) for an electronic device, which includes a plurality of anodes and a plurality of cathodes arranged radially in an alternating fashion for electrical insulation from one another, and an electronic device using the same. The IDE in which the anodes and the cathodes are arranged radially in an alternating fashion is fabricated and applied to the electronic device, so that the entire fabrication process can be simplified compared to that of a typical electronic device in which an upper electrode is different from a lower electrode. Also, circular or polygonal IDEs can be applied to systems that are driven or measure values on their central axes, thereby enhancing the performance and efficiency of the systems. Furthermore, the circular or polygonal IDEs can be employed in systems such as acoustic sensors, pressure sensors, micro-speakers, biological sensors, and acceleration sensors, so that the structure and operation of the systems can be simplified.

Interdigitated touchscreen electrodes. A device includes a plurality of adjacent electrodes for a touch sensitive device. The electrodes run generally in a first direction. Adjacent electrodes are interdigitated to provide one or more interpolation sections of the electrodes. Touch sensitive devices may utilize such interdigitated electrodes as drive electrodes, along with transverse sense electrodes formed over a display.

The invention relates to a piezoresistive sensor probe based on a conductive polymeric sensitive membrane and a preparation method thereof, pertaining to the technical field of a force sensor. The probe consists of a base, an interdigitated electrode printed on the base and the conductive polymeric sensitive membrane vulcanized on the electrode; the membrane is essentially composed of conductive carbon black as a conductive phase and single-pack room-temperature vulcanized silicone rubber as an insulation phase. The method comprises the steps that: powder of the conductive carbon black and the liquid single-pack room-temperature vulcanized silicone rubber are mixed in an ethane organic solvent; mechanical stirring is carried out in sonic oscillation, and carbon black suspending liquid with even dispersion and good liquidity is produced; a cascade spin coating method is used for coating the suspending liquid on the base provided with the interdigitated electrode to form a conductive polymeric membrane; then packaging and vulcanization are carried out, and the piezoresistive sensor probe is formed. By adopting the method of the invention, sensor probes with thin structure, good flexibility, wide measuring range and high precision can be manufactured and are especially applicable to the online monitoring of contact force and extrusion force between curved surfaces.

A freestyle miniature supercapacitor based on laser graphics and a manufacturing method thereof belong to the technical field of micro-power energy storage. The structure is composed of a solid electrolyte, a flexible electrode and a metal current collector from the bottom up. Carbon nanotubes are dispensed on electrospun nanofibers to obtain the flexible electrode. The present invention proposes the freestyle miniature supercapacitor which uses a planar interdigitated electrode. Compared with a conventional supercapacitor in a sandwich structure, the freestyle miniature supercapacitor has a much lower device thickness, higher device flexibility, and can be better integrated with flexibly electronic devices. Meanwhile, through use of the advantages of the high specific surface area and high conductivity of the electrospun nanofibers and the carbon nanotubess, the light and stable flexible electrode is manufactured to further improve the energy and power density. Compared with other miniature supercapacitors, the freestyle miniature supercapacitor of the invention has the much lower device thickness in a novel electrolyte transfer mode without any additional substrate, and the damage which may be brought for complex transfer technology can be avoided.

Nanoscale high-aspect-ratio metallic structures and methods are presented. Such structures may form transparent electrode to enhance the performance of solar cells and light-emitting diodes. These structures can be used as infrared control filters because they reflect high amounts of infrared radiation. A grating structure of polymeric bars affixed to a transparent substrate is used. The sides of the bars are coated with metal forming nanowires. Electrodes may be configured to couple to a subset of the rails forming interdigitated electrodes. Encapsulation is used to improve transparency and transparency at high angles. The structure may be inverted to facilitate fabrication of a solar cell or other device on the back-side of the structure. Multiple layered electrodes having an active layer sandwiched between two conductive layers may be used. Layered electro-active layers may be used to form a smart window where the structure is encapsulated between glass to modify the incoming light.

An ethanol sensor based on a zinc oxide nanometer structure and a preparing method thereof are provided. The ethanol sensor comprises two electrode groups forming an interdigitated electrode and a zinc oxide nanometer film on at least one side surface of the interdigitated electrode. The zinc oxide nanometer film is formed by zinc oxide nanowires having a hexagonal wurtzite crystal phase. The two electrode groups of the interdigitated electrode are not conducted and form signal output ends of the ethanol sensor. The ethanol sensor can sense resistance reduction on the zinc oxide surface caused by ethanol absorption. The responsivity of the ethanol sensor is in approximate linear variation with the concentration of added ethanol gas in the environment.

The change in tissue impedance due to the change in the extracellular matrix that results from the degradation of cartilage is utilized to detect degradation of articular cartilage. A probe comprising electrodes is applies a current to the articular cartilage which results in a current distribution and electric field within the cartilage, along with an associated voltage drop across the electrodes. The amplitude of this voltage drop is then measured and divided by the current applied to determine the tissue impedance. By measuring the impedance of patient tissue and comparing the detected patient impedance to a normal value for the tissue from clinically normal tissue, a determination of whether the patient tissue is degraded and the extent of degradation is possible. Preferably, the impedance is measured using a probe with interdigitated electrodes. By changing which electrodes are utilized, the wavelength of the current distribution changes, allowing the probe to image depth dependent focal lesions.

The invention particularly relates to a high-performance semiconductor ultraviolet photoelectric detector and a preparation method thereof, wherein for the high-performance semiconductor ultraviolet photoelectric detector, an ultra-thin silicon chip is used as a substrate, a nano TiO2/SrTiO3 heterojunction active layer is used as a base material, and Au is used as a metal interdigitated electrode. The preparation method comprises the following steps of: preparing a TiO2 and SrTiO3 sol by adopting a sol-gel technology, and growing a compact nano SrTiO3 film and a compact TiO2 film in order on the ultra-thin silicon substrate; and preparing the Au interdigitated electrode with a certain shape on the surface of the films through adoption of a magnetron sputtering technology and a standard photoetching and stripping technology. The TiO2/SrTiO3 heterojunction metal-semiconductor-metal ultraviolet detector prepared with the preparation method disclosed by the invention has the characteristics of simple preparation method, low cost and potentiality in large-scale production, and has a good detection performance for detecting ultraviolet rays of which the wavelength is 250-350 nm.

A black silicon based metal-semiconductor-metal photodetector includes a silicon substrate and a black silicon layer formed on the silicon substrate. An interdigitated electrode pattern structure is formed on the black silicon layer, which can be a planar or U-shaped structure. A thin potential barrier layer is deposited at the interdigitated electrode pattern structure. An Al or transparent conductive ITO thin film is deposited on the thin potential barrier layer. A passivation layer is provided on the black silicon layer. In the black silicon based metal-semiconductor-metal photodetector, the black silicon layer, as a light-sensitive area, can respond to ultraviolet, visible and near infrared light.

The invention discloses a gradient piezoelectric fiber composite material, which comprises two interdigitated electrodes, piezoelectric fibers and a high-molecular polymer, wherein the volume percent of the piezoelectric fibers is 45%-90%; and the volume percent of the high-molecular polymer is 10%-55%; the piezoelectric fibers and the high-molecular polymer are alternately arranged; and the volume fraction of the single piezoelectric fiber is in a continuous gradient change along with the transverse direction of the gradient piezoelectric fiber composite material. The gradient piezoelectric fiber composite material disclosed by the invention has high flexibility and excellent piezoelectric drive characteristic; the continuously changing drive deformation capacity can be provided in the transverse direction of the composite material; and the gradient piezoelectric fiber composite material integrates the piezoelectric fibers, the polymer and the interdigitated electrodes into a whole, and is high in integration level and convenient to operate and use. In addition, the gradient piezoelectric fiber composite material is prepared by a cutting-filling method, and is simple in process, low in cost, short in production cycle and stable in product performance.

There is provided an electrostatic actuator with the interdigitated electrode structure comprising a movable rod 11 disposed in parallel with an alignment axis line Ox predetermined on a substrate; a movable interdigitated electrode 12 fixed on the both sides of a coupling point 11C on the movable rod 11 and having a plurality of movable electrode fingers 12b; fixed interdigitated electrodes 21, 22 fixed to the substrate and having a plurality of fixed electrode fingers 21b, 22b; and four hinges 23, 24 whose one ends are anchored respectively to the movable rod and the other ends are anchored to anchoring points 32A-32D of the substrate. Lengths of those hinges are longer than distances from anchoring points to the alignment axis line and a displacement Lc of a coupling point 11C in a direction orthogonal to the alignment axis line is reduced to be smaller than a distance between the respective movable electrode fingers and the closest fixed electrode finger.