250results about "Multiple capacitors" patented technology

An embodiment of the present invention provides a stepping actuator, comprising a suspended membrane comprising a plurality of movable electrodes connected by plurality of spring hinges to a payload platform; and anchors connecting said membrane to a substrate, said substrate comprising a plurality of fixed electrodes; wherein said movable electrodes of said suspended membrane and said fixed electrodes from said substrate form parallel-plate electrostatic sub-actuators.

A micro electro-mechanical system (MEMS) variable capacitor is described, wherein movable comb electrodes of opposing polarity are fabricated simultaneously on the same substrate and are independently actuated. The electrodes are formed in an interdigitated fashion to maximize capacitance. The MEMS variable capacitor includes CMOS manufacturing steps in combination with elastomeric material selectively used in areas under greatest stress to ensure that the varactor will not fail as a result of stresses that may result in the separation of dielectric material from the conductive elements. The combination of a CMOS process with the conducting elastomeric material between vias increases the overall sidewall area, which provides increased capacitance density.

A solid electrolytic capacitor having at least two capacitor elements using a valve action metal, such as tantalum or niobium, and laminated in a direction perpendicular to a mounting surface of a substrate. The capacitor elements have a width parallel to the mounting surface of the substrate greater than a thickness perpendicular to the mounting surface of the substrate, and an anode terminal is connected with anode leads led out to at least one side of an anode body made of the valve action metal generally in parallel to the mounting surface of the substrate. A cathode layer on a dielectric oxide film of the anode body is connected to a cathode terminal and is coated with exterior coating resin with a part of the anode terminal and a part of the cathode terminal exposed.

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 MEMS module is provided comprising at least one MEMS device adhesively bonded to a substrate or wafer, such as a CMOS die, carrying pre-processed electronic circuitry. The at least one MEMS device, which may comprise a sensor or an actuator, may thus be integrated with related control, readout/signal conditioning, and/or signal processing circuitry.

An example of a method pursuant to the invention comprises the adhesive bonding of a pre-processed electronics substrate or wafer to a layered structure preferably in the form of a silicon-on-insulator (SOI) substrate. The SOI is then bulk micromachined to selectively remove portions thereof to define the MEMS device. Prior to release of the MEMS device, the device and the associated electronic circuitry are electrically interconnected, for example, by wire bonds or metallized vias.

An ultracapacitor or hybrid capacitor includes an electrically non-conductive rigid or semi-rigid porous honeycomb structure (12) having cells extending along a common direction and having an average density per unit area within in a plane perpendicular to the common direction exceeding 15.5 per square centimeter, desirably formed of a material that is stable at temperatures of 300° or more, such that high temperatures processing can be used to help ensure high purity of the final product. The material may desirably be an oxide or non-oxide ceramic, such as cordierite, silicon nitride, alumina, aluminum titanate, zircon, glass, or glass-ceramic.

A capacitor assembly comprising a casing, an anode pack housed within the casing and comprising two or more anode pellets of anode active material electrically connected to each other by a bridge, and a cathode comprised of cathode current collectors including major faces with cathode active material provided thereupon is described. The bridge, which spans between sidewalls of the anode pellets, helps maintain them in a parallel alignment. The bridge is also a convenient location to connect the feedthrough wire that exits the casing through a glass-to-metal seal. The cathode current collectors are disposed between adjacent anode pellets and are electrically connected to each other and to the casing. A feedthrough wire electrically connected to the anode pack extends outside the casing in electrical isolation there from. An electrolyte is provided to activate the anode and the cathode.

A capacitor provides a plurality of selectable capacitance values, by selective connection of six capacitor sections of a capacitive element each having a capacitance value. The capacitor sections are provided in a plurality of wound cylindrical capacitive elements. Two vertically stacked wound cylindrical capacitance elements may each provide three capacitor sections. There may be six separately wound cylindrical capacitive elements each providing a capacitor section. The capacitor sections have a common element terminal. A pressure interrupter cover assembly is sealingly secured to the open end of case for the elements and has a deformable cover with a centrally mounted common cover terminal and a plurality of section cover terminals mounted at spaced apart locations. A conductor frangibly connects the common element terminal of the capacitor section to the common cover terminal and conductors respectively frangibly connect the capacitor section terminals to the section cover terminals. Deformation of the cover caused by failure of the capacitor element breaks at least some of the frangible connections sufficient to disconnect the capacitive element from an electric circuit in which it is connected. A cover insulation barrier mounted on the deformable cover, has a barrier cup substantially surrounding the common cover terminal and a plurality of barrier fins each extending radially outwardly from the barrier cup, and deployed between adjacent section cover terminals.

A variable capacitance element includes a movable element provided above a substrate using supporting portions and support beams so as to be displaced from the substrate. An insulating film and a movable electrode are provided on a conductor facing surface of the movable element. A driving electrode is arranged to displace the movable element, between a signal cutoff position and a signal passage position, whereby a high frequency signal transmitted through a transmission line is cut off or allowed to pass. The insulating film uses compressive stress to warp the movable element and the movable electrode in a direction of warping in a convex form toward the transmission line, and maintains this warping direction.

A liquid column-based normal/shear pressure/force sensing device having an elastic electrolyte-electrode contact with large interfacial capacitance to achieve high sensitivity and resolution with flexible and transparent constructs.

A capacitor provides a plurality of selectable capacitance values, by selective connection of six capacitor sections of a capacitive element each having a capacitance value. The capacitor sections are provided in a plurality of wound cylindrical capacitive elements. Two vertically stacked wound cylindrical capacitance elements may each provide three capacitor sections. There may be six separately wound cylindrical capacitive elements each providing a capacitor section. The capacitor sections have a common element terminal.

A piezoelectric driving type MEMS apparatus includes: a supporting portion provided on a substrate; and a piezoelectric actuator, which is supported on the supporting portion, including a piezoelectric film and a driving electrode configured to drive the piezoelectric film, the piezoelectric film in the piezoelectric actuator having at least one slit extending along a longitudinal direction of the piezoelectric actuator.

A capacitor device has a plurality of capacitors, each comprising a capacitor element having a positive electrode and a negative electrode in a confronting arrangement through a separator, and a metal case encasing the capacitor element and an electrolyte. The plurality of capacitors comprise a plurality of first capacitors, each using the metal case as a negative electrode, and a plurality of second capacitors, each using the metal case as a positive electrode. The capacitor device is characterized by a structure that a pair of the first capacitor and the second capacitor form a capacitor unit by having their metal cases coupled with a metal plate, a plurality of capacitor units form a subunit by being connected in series or parallel, and a plurality of subunits form a main unit by being connected in series or parallel. The invention helps facilitate connections when coupling the plurality of capacitor units, and substantially reduces a space required for the connections. The invention also decreases an undesirable resistance associated with the connections.