Class 361/277 - Variable

Subclass of Class 361 - Electricity: electrical systems and devices
Definition: Subject matter wherein the capacitance of the capacitor
No. of patents: 239
Last issue date: 04/03/2012

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Number	Title	Issue Date
8149564	MEMS capacitive device and method of forming same A MEMS capacitive device (90) includes a fixed capacitor plate (104) formed on a surface (102) of a substrate (100). A movable capacitor plate (114) is suspended above the fixed capacitor plate (104) by compliant members (	04/03/2012
8064186	Method of manufacturing capacitive elements for a capacitive device A method of manufacturing capacitive elements for a capacitive device which comprises one or more layers is provided. At least one layer is etched from a first surface to a second surface thereof to form two sections of the layer, such that the sections are movable ...	11/22/2011
8059385	Substrates with slotted metals and related methods Substrates with slotted metals and related methods are provided. According to one aspect, a slotted metal attached to a substrate can include a metal patterned with slots less than or about equal to 2 microns. The slots can result in line widths that are approximate...	11/15/2011
8045318	Tunable capacitor using electrowetting phenomenon A tunable capacitor using an electrowetting phenomenon includes a first electrode; a second electrode which is spaced apart from the first electrode and faces the first electrode; a fluidic channel which is disposed between the first electrode and the second electro...	10/25/2011
8040656	Array variable capacitor apparatus An array variable capacitor apparatus includes a line unit including a ground line and a signal line which operates as a lower electrode; and a plurality of plates which are engaged with the line unit to generate capacitance and which operate as upper electrodes, th...	10/18/2011
8009406	Capacitance arrangement and method relating thereto A capacitance arrangement comprising at least one parallel-plate capacitor comprising a first electrode means, a dielectric layer and a second electrode means partly overlapping each other. A misalignment limit is given. Said first electrode means comprises a first ...	08/30/2011
8004818	Adjustable device and method for varying the apparant value of capacitance The invention specifically concerns a device for varying the apparent level of a capacitance, said device being characterized in that it compromises: —a dipole (1) of a type known per se, comprising a semiconductor material (4) for electronic transfe...	08/23/2011
7986507	Variable capacitor A variable capacitor is provided which is appropriate for suppressing fluctuation in driving voltage characteristic and for achieving a larger variation ratio of static capacitance. The variable capacitor includes a fixed electrode and a movable electrode. The fixed...	07/26/2011
7983019	Capacitor based transformer A device for generating a voltage comprises first and second plates spaced apart from each other, for being charged at respective different potentials. A third plate is placed at a first distance from the first plate so as to form a first capacitor, and a first semi...	07/19/2011
7940514	MEMS device using an actuator A micro-electro-mechanical system (MEMS) includes a first electrode interposed between a first fixed end and a second fixed end, the first electrode being movable by an actuator element. The MEMS also includes a substrate on which the first and second fixed ends are...	05/10/2011
7936553	Capacitors adapted for acoustic resonance cancellation An embodiment of the present invention provides a device, comprising a multilayered tunable dielectric capacitor, wherein said multilayers of tunable dielectric are adapted to be DC biased to reduce the dielectric constant; and wherein the DC bias is arranged so tha...	05/03/2011
7881038	Variable capacitor, variable capacitor apparatus, high frequency circuit filter, and high frequency circuit A variable capacitor including a first electrode part, which is provided at a fixed part that includes a substrate, and a movable part, which has a second electrode part forming the capacity of said variable capacitor between itself and the first electrode part, and...	02/01/2011
7808765	Varactors including interconnect layers In an embodiment of the present invention is provided a varactor comprising a substrate, a bottom electrode positioned on a surface of the substrate, a tunable dielectric material positioned adjacent to and extending over the bottom electrode forming a step and in c...	10/05/2010
7742275	MEMS capacitor with conductively tethered moveable capacitor plate A capacitive device including at least one actuator structure formed on a substrate is provided. The capacitive device further includes a moveable structure formed on the substrate and mechanically coupled to the at least one actuator structure. The moveable structu...	06/22/2010
7558046	Variable-capacitance electromechanical micro-capacitor and method for producing such a micro-capacitor A first electrode is integral to a beam having two ends securedly affixed to a support fixed onto a substrate. Residual stresses cause buckling of the beam so that the arch of the beam is close to at least one second electrode. The support can be formed by a ring fi...	07/07/2009
7539003	Capacitive micro-electro-mechanical sensors with single crystal silicon electrodes The devices presented herein are capacitive sensors with single crystal silicon on all key stress points. Isolating trenches are formed by trench and refill forming dielectrically isolated conductive silicon electrodes for drive, sense and guards. For pressure sensi...	05/26/2009
7505245	Semiconductor physical quantity sensor and method for manufacturing the same A method for manufacturing a semiconductor physical quantity sensor including a support substrate, a movable electrode, a fixed electrode is provided. The method includes the steps of: preparing a multi-layered substrate; forming a compression stress layer on a part...	03/17/2009
7495882	Electronic components comprising adjustable-capacitance micro-electro-mechanical capacitors Electronic component comprising at least one micro-electromechanical capacitor with adjustable capacitance comprising two electrodes free to move with respect to each other, and a control circuit (30) comprising measurement means (32) to measure the ca...	02/24/2009
7440254	Micro-electromechanical variable capacitor A micro-electromechanical variable capacitor with first and second capacitor plates spaced apart to define a gap therebetween. The first plate has two control electrodes and an active electrode. The second plate is movable relative to first plate when a voltage is a...	10/21/2008
7411774	Voltage variable capacitor A charge storage device having a capacitance that is variable by alteration of the relative permittivity of the dielectric positioned between conductive electrodes within the device. The device consists of two conductive plates sandwiching a conductive grid, typical...	08/12/2008
7400488	Variable capacitance membrane actuator for wide band tuning of microstrip resonators and filters A device for varying the capacitance of an electronic circuit is disclosed. The device comprises a flexible membrane located above the electronic circuit, a metal layer connected to the flexible membrane, and bias circuitry located above the membrane. Variation of t...	07/15/2008
7400489	System and a method of driving a parallel-plate variable micro-electromechanical capacitor A method of driving a parallel-plate variable micro-electromechanical capacitor includes establishing a first charge differential across first and second conductive plates of a variable capacitor in which the first and second conductive plates are separated by a var...	07/15/2008
7394641	MEMS tunable capacitor with a wide tuning range A MEMS tunable capacitor and method of fabricating the same, includes a plurality of fixed charge plates on a substrate, the plurality of fixed charge plates having a same height, being arranged in a shape of comb-teeth and being electrically connected to one anothe...	07/01/2008
7388247	High precision microelectromechanical capacitor with programmable voltage source A high precision microelectromechanical capacitor with programmable voltage source includes a monolithic MEMS device having a capacitance actuator, a trim capacitor, and a high precision, programmable voltage source. The trim capacitor has a variable capacitance val...	06/17/2008
7385800	Micro-electro-mechanical system (MEMS) capacitors, inductors, and related systems and methods According to one aspect, the subject matter described herein includes a MEMS fixed capacitor and a method for fabricating the MEMS fixed capacitor. The MEMS fixed capacitor can include a first stationary, capacitive plate on a substrate. Further, the MEMS fixed capa...	06/10/2008
7375948	Variable charge packet integrated circuit capacitor A variable IC capacitor includes a semiconductor layer doped to contain mobile charge carriers. Capacitor electrodes C1 and C2 are disposed adjacent to each other on the layer's surface, gate electrodes G1 and G2 are disposed on opposite ...	05/20/2008
7368998	Inductor element containing circuit board and power amplifier module An inductor element containing circuit board of the present invention comprises a plurality of conductive layers, and a conductor having an inductor function (inductor conductor segment) in one or more of the conductive layers, wherein at least part of the inductor ...	05/06/2008
7369828	Electronically tunable quad-band antennas for handset applications An electronically tunable quad-band antenna which includes a tunable high band antenna tuned by at least one tunable varactor associated therewith; the tunable high band antenna further includes a substrate, a patch element on said substrate, at least one voltage tu...	05/06/2008
7369394	Variable capacitor, circuit module, and communications apparatus A variable capacitor includes a supporting substrate and a plurality of variable capacitance elements, and bias lines. The plurality of variable capacitance elements is formed on the supporting substrate, each of which is composed of a lower-laid first electrode lay...	05/06/2008
7369396	Composite electroactive material for electromechanical actuators A composite electroactive material having a plurality of particle cores, each particle core surrounded by a polymer covering having one or more strands of an electroactive polymer. In one embodiment, the particle cores have a relatively small size, e.g., between abo...	05/06/2008
7356310	Adaptive radio transceiver with floating MOSFET capacitors An exemplary embodiment of the present invention described and shown in the specification and drawings is a transceiver with a receiver, a transmitter, a local oscillator (LO) generator, a controller, and a self-testing unit. All of these components can be packaged ...	04/08/2008
7346981	Method for fabricating microelectromechanical system (MEMS) devices A process for fabricating a MEMS device comprises the steps of depositing and patterning on one side of a wafer a layer of material having a preselected electrical resistivity; bonding a substrate to the one side of the wafer using an adhesive bonding agent, the sub...	03/25/2008
7347102	Contact-type electric capacitive displacement sensor A contact-type electric capacitive displacement sensor includes a stationary element having a stationary plate, a stationary conductive pattern formed on the stationary plate and an insulation film coated on the stationary plate and a displaceable element having a d...	03/25/2008
7345866	Continuously tunable RF MEMS capacitor with ultra-wide tuning range A method is provided of continuously varying the capacitance of a MEMS varactor having a cantilever assembly mounted on a base portion, the cantilever assembly having a first capacitance plate and a dielectric element mounted thereon, and the base portion having a s...	03/18/2008
7342346	Microfabricated vertical comb actuator using plastic deformation A microfabricated actuator of the vertical comb-drive (AVC) type or staggered vertical comb-drive type for torsional or linear applications includes torsion springs which permit self-aligned deformation of the device (micromirror) structure of the actuator through t...	03/11/2008
7340952	Capacitive humidity sensor A capacitive humidity sensor includes a printed circuit board having an insulating substrate on which a circuit section is formed, a pair of electrodes formed on a surface of the insulating substrate to be opposite from each other with a space, and a humidity sensit...	03/11/2008
7324323	Photo-sensitive MEMS structure A heat-sensitive apparatus includes a substrate with a top surface, one or more bars being rotatably joined to the surface and having bimorph portions, and a plate rotatably joined to the surface and substantially rigidly joined to the one or more bars. Each bimorph...	01/29/2008
7319580	Collapsing zipper varactor with inter-digit actuation electrodes for tunable filters According to one embodiment a microelectromechanical (MEMS) switch is disclosed. The MEMS switch includes a substrate, a plurality of actuation electrodes mounted on the substrate, a plurality of bottom electrodes mounted on the substrate, a capacitor having subcomp...	01/15/2008
7319581	Capacitive pressure sensor A capacitive pressure sensor includes: a conductive silicon substrate having a diaphragm; an insulating substrate having a fixed electrode, the insulating substrate overlapping the conductive silicon substrate so as to be bonded thereto; and a sealed chamber formed ...	01/15/2008
7310215	Direct digitally tunable microwave oscillators and filters A tunable element in the microwave frequency range is described that may include one or more tunable elements that are directly digitally controlled by a digital bus connecting a digital control circuit to each controlled element. In particular, each digital signal ...	12/18/2007

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Class 361/277 - Variable