21 results about "Effective capacitance" patented technology

The invention is suitable for the technical field of circuit monitoring, and provides a capacitance value online monitoring method and system based on thin film capacitor self-healing feature perception, and the method comprises the steps: synchronously collecting a voltage signal and a current signal of a to-be-detected thin film capacitor based on a preset sampling period, and constructing a voltage sequence and a current sequence with a unified time sequence; determining a candidate transient time window based on a preset sampling period and the voltage sequence; in the candidate transient time window, a time sequence of a self-healing event is determined based on the voltage sequence and the current sequence, and the self-healing event comprises an arcing stage, an arc quenching stage and a charging recovery stage; and based on the initial voltage, the final voltage and the effective charging current in the charging recovery stage, determining an effective capacitance estimation value of the to-be-tested thin-film capacitor. According to the technical scheme provided by the invention, the self-healing behavior of the thin-film capacitor is accurately identified, so that online monitoring of the capacitance value of the thin-film capacitor is realized, and the capacitance value monitoring error is effectively reduced.

A method of determining a lifetime parameter of a capacitor in a failsafe device includes measuring an amount of energy required to return the failsafe device to a failsafe position, measuring an effective capacitance of the capacitor, and comparing the amount of energy to the effective capacitance to determine the lifetime parameter of the capacitor.

One object is to inhibit the reduction of effective capacitance of a capacitor that includes an intermediate layer containing Fe. An aspect of the present disclosure provides a capacitor including a body, a first external electrode provided on the body, and a second external electrode provided on the body. The body includes: a first internal electrode layer; a second internal electrode layer; a dielectric layer disposed between the first and second internal electrode layers; and a first intermediate layer disposed between the first internal electrode layer and the dielectric layer, the first intermediate layer containing Fe at a first concentration. The first concentration is from 0.2 at % to 5 at %. The dielectric layer contains Fe at a second concentration, and the second concentration is less than 1 at %. An Fe concentration ratio, which represents a ratio of the first concentration to the second concentration, is greater than 1.

Embodiments of the present disclosure advantageously provide semiconductor devices, in particular Finn field-effect transistors (FinFETs), and methods for manufacturing such devices having improved effective capacitance (Ceff). The FinFET includes a gate structure in which a void is provided by recessing a high dielectric constant material layer placed between the gate structure and a spacer layer, thereby reducing the effective dielectric constant in the high dielectric constant dielectric layer and improving the effective capacitance (Ceff) of the device.

A distributed tunable capacitor for a magnetic resonance imaging radio-frequency coil, the distributed tunable capacitor comprising an upper conductor (1), a lower conductor (3), and an insulating dielectric layer (2), wherein the upper conductor (1) is located on the upper surface of the insulating dielectric layer (2), and the lower conductor (3) is located on the lower surface of the insulating dielectric layer (2); and the overlapping portion between the upper conductor (1) and the lower conductor (3) in the vertical direction is an effective capacitor, and the area of the effective capacitor represents an effective capacitance value. Effective capacitors in the distributed tunable capacitor have the same unit area and the same capacitance value, such that when the distributed tunable capacitor is trimmed to reduce the capacitance value, it is only necessary to count a corresponding number of effective capacitors and cut same off, instead of trimming a tiny amount repeatedly through trial and error, thereby greatly reducing the debugging time of a magnetic resonance imaging radio-frequency coil.

This invention provides a multilayer ceramic capacitor comprising a plurality of segregated particles with a size of less than 10 micrometers, present in an effective capacitance portion. Most of the segregated particles are in direct contact with an internal electrode layer. The composition of the segregated particles includes silicon, alkaline earth metals, and rare earth elements. The concentration of the silicon-containing segregated particles is greater than the concentration of the alkaline earth metal-containing segregated particles, and the concentration of the alkaline earth metal-containing segregated particles is greater than the concentration of the rare earth element-containing segregated particles. The multilayer ceramic capacitor of this invention maintains high capacitance and avoids insulation resistance degradation caused by high temperature or high voltage, thus exhibiting excellent high-temperature load life and reliability.

An apparatus includes a logic gate, a first inverter, a second inverter, a first resistor connected between the output of the logic gate and the input terminal of the first inverter, a first capacitor connected between the input terminal and the output terminal of the first inverter, a second resistor connected between the output terminal of the first inverter and the input terminal of the second inverter, a second capacitor connected between the input terminal of the second inverter and ground, and a third resistor connected between the output terminal of the second inverter and the logic gate, wherein the second input of the logic gate is configured to receive an enable signal, and wherein the first inverter is configured as a negative amplifier such that an effective capacitance provided by the first inverter and the first capacitor is greater than a physical capacitance of the first capacitor.

Embodiments of the present disclosure advantageously provide semiconductor components, particularly fin field effect transistors (FinFETs), and methods of making such components with improved effective capacitance (Ceff). The FinFET includes a gate structure in which an air gap is provided by recessing a high dielectric constant material layer disposed between the gate structure and a spacer layer, thereby reducing the effective dielectric constant in the high dielectric constant dielectric layer and improving the effective capacitance (Ceff) of the component.

Provided is a laminated ceramic capacitor, comprising a plurality of segregated particles with a size of 10 microns or less in an effective capacitance part; wherein the segregated particles are most in direct contact with the internal electrode layers, and the segregated particles have ingredients comprising Si, an alkaline earth metal, a rare earth element or a combination thereof. The segregated particles comprising Si are in a higher concentration than that of the segregated particles comprising the alkaline earth metal, and the segregated particles comprising the alkaline earth metal are in a higher concentration than that of the segregated particles comprising the rare earth element. The laminated ceramic capacitor of the present invention can maintain a high capacitance and avoid insulation resistance degradation resulting from a high temperature or a high voltage, thereby demonstrating a good high-temperature operating life and good reliability.

Disclosed is a diode device (1) including an insulator (7) extending between and in contact with two metal terminals (3, 5), wherein the insulator comprises at least one epsilon-near-zero (ENZ) material, or comprises at least one epsilon-negative (ENG) material (7A) and a second insulator material (7B) forming a double insulator structure, and an electron source layer (9), particularly of graphene, between a metal terminal and the ENZ or ENG material. The insulator provides a reduced effective capacitance which permits rectifying diode operation at THz, infrared or visible frequencies, particularly for a solar radiation rectenna.

Lensed antennas are provided that include a plurality of radiating elements and a lens positioned to receive electromagnetic radiation from at least one of the radiating elements, the lens comprising a plurality of rods. The rods include dielectric material and / or unit cell structures with three-dimensional meta-material patterns. The rods can be formed of stacked rod members. The stacked rod members can be formed by a stacked series of the unit cell structures. The rods can have the same size and materials with different spacings, the same size and spacing and different materials, or different sizes with the same or different spacing, each configuration arranged to define different effective permittivities across a diameter of the lens.

An apparatus includes a first inverter, a first capacitor connected between the input terminal and the output terminal of the first inverter, a second inverter, a third inverter, a second capacitor connected between the input terminal and the output terminal of the third inverter, a fourth inverter, a plurality of resistors coupled in series between an output of a logic gate and a first input of the logic gate, and a third capacitor connected between the first input of the logic gate and ground, wherein the logic gate has a second input configured to receive an enable signal, and wherein each of the first inverter and the third inverter is configured as a negative amplifier such that an effective capacitance between its input and output terminals is greater than a physical capacitance of the corresponding capacitor.

This application provides a transmitting filter and its configuration method. The transmitting filter includes: a first resonator, a second resonator, and a third resonator connected in series; a first resonant module connected between the first and second resonators, wherein the resonator in the first resonant module corresponds to a first effective capacitor; a second resonant module connected between the second and third resonators, wherein the resonator in the second resonant module corresponds to a second effective capacitor; the first effective capacitor and a corresponding grounding inductor are used to form a first transmission zero frequency; the second effective capacitor and a corresponding grounding inductor are used to form a second transmission zero frequency; the frequency range formed by the first and second transmission zero frequencies includes the frequencies corresponding to the second harmonic signal and the third harmonic signal. The transmitting filter and its configuration method can improve the signal quality output by the transmitting filter.

The embodiment of the present disclosure discloses a micro-electro-mechanical system sensor and electronic equipment. The micro-electro-mechanical system sensor comprises a substrate layer, a first electrode layer and a support layer, the support layer is arranged between the first electrode layer and the substrate layer, so that a suspended space gap is formed between the first electrode layer and the substrate layer. One technical effect of the embodiment of the present disclosure is that the support layer is arranged between the first electrode layer and the substrate layer to form a suspended space gap. While increasing the distance between the first electrode layer and the substrate layer, the dielectric constant ε is also reduced, thereby increasing the output of the effective capacitance of the entire sensor.

Provided is a laminated ceramic capacitor (1), comprising multiple segregated particles (7) having a size of 10 microns or less in an effective capacitance part (40); wherein the segregated particles (7) are mostly in direct contact with the internal electrode layers (3), and the segregated particles (7) have ingredients comprising Si, an alkaline earth metal, a rare earth element or a combination thereof. The segregated particles (7) comprising Si are in a higher concentration than the segregated particles (7) comprising the alkaline earth metal, and the segregated particles (7) comprising the alkaline earth metal are in a higher concentration than the segregated particles (7) comprising the rare earth element. The laminated ceramic capacitor (1) of the present invention can maintain a high capacitance and avoid insulation resistance degradation resulting from a high temperature or a high voltage, thereby demonstrating a good highly accelerated lifetime and good reliability.

Provided is a laminated ceramic capacitor, comprising multiple segregated particles having a size of 10 microns or less in an effective capacitance part; wherein the segregated particles are mostly in direct contact with the internal electrode layers, and the segregated particles have ingredients comprising Si, an alkaline earth metal, a rare earth element or a combination thereof. The segregated particles comprising Si are in a higher concentration than the segregated particles comprising the alkaline earth metal, and the segregated particles comprising the alkaline earth metal are in a higher concentration than the segregated particles comprising the rare earth element. The laminated ceramic capacitor of the present invention can maintain a high capacitance and avoid insulation resistance degradation resulting from a high temperature or a high voltage, thereby demonstrating a good highly accelerated lifetime and good reliability.

The invention discloses a relaxation oscillator, method and system capable of calibrating temperature and frequency simultaneously, the relaxation oscillator comprises a voltage average feedback VAF circuit, the voltage average feedback VAF circuit comprises an oscillation capacitor, a comparator, a latch and a voltage division network used for generating reference voltage Vref, and the voltage division network comprises a main voltage division branch and an auxiliary voltage division branch, the main reference voltage generation circuit is connected between power supply voltage and the ground, is used for generating main reference voltage and comprises a first-class resistor and a second-class resistor, the first-class resistor has a first temperature coefficient, and the second-class resistor has a second temperature coefficient; the first programmable adjusting unit is used for responding to a first digital control signal so as to adjust the effective resistance value of the first type of resistors; the second programmable adjusting unit is used for responding to the second digital control signal to adjust the effective capacitance value of the oscillation capacitor; according to the circuit and the method, the output frequency and the temperature coefficient of the oscillator can be independently, accurately, efficiently and simultaneously calibrated, and the product performance and the production yield are greatly improved.

The invention relates to the technical field of software engineering, in particular to a key control method and a non-contact wireless key controller, and the method comprises the steps: carrying out the basic detection of the non-contact wireless key controller, and judging whether the non-contact wireless key controller is in a normal working state or not; if the non-contact wireless key controller is in a normal working state, acquiring equipment configuration parameters and current environment data, and generating a capacitance change detection threshold value based on the equipment configuration parameters and the current environment data; obtaining capacitance change data, and determining an effective capacitance change matrix according to the capacitance change detection threshold and the capacitance change data; based on the effective capacitance change matrix and the equipment configuration parameters, a control instruction is generated and sent to the target equipment, and the control instruction is used for controlling the target equipment to complete operation. According to the invention, the flexibility and environmental adaptability of human-computer interaction can be improved, so that the user experience and the overall intelligent level of the system are improved.

The invention belongs to the field of effective capacitance measurement, and discloses an effective capacitance measurement method and system based on single-frequency impedance, and the method comprises the steps: S1, placing a working electrode, a reference electrode and a counter electrode of an electrochemical system in an electrolyte solution; s2, applying a single-frequency alternating-current potential signal to the working electrode; s3, measuring the impedance of the working electrode at a specific frequency point; s4, calculating effective capacitance according to the impedance; and S5, evaluating the performance of the electrochemical system based on the effective capacitance. The method is simplified and efficient, single-frequency measurement is adopted to replace complex broadband scanning, the measurement time is remarkably shortened, the calculation burden is reduced, and the method is suitable for real-time monitoring and portable equipment. By analyzing the change of the effective capacitance along with the frequency, various electrochemical characteristics such as capacitance behavior, film resistance, ion transfer process, potential dependence and gas interference of the fixed connection layer can be effectively represented.

The utility model discloses a capacitive sensing device and equipment adopting an FPC (Flexible Printed Circuit). The capacitive sensing device comprises a substrate, a capacitive sensing circuit, a sensing carrier, a wiring port and a coating layer, wherein the capacitive sensing circuit, the sensing carrier and the wiring port are arranged on the substrate; the substrate is a flexible circuit board; one end of the capacitive sensing circuit is connected with the sensing carrier, and the other end is connected with the wiring port. The flexible circuit board is different from a traditional PCB structure, the size of the induction device is greatly reduced, and effective capacitive induction of an uneven cambered surface can be achieved.

The invention relates to the technical field of semiconductors, in particular to a semiconductor device and a preparation method thereof. The device can comprise a substrate and at least one trench capacitor assembly located on the substrate. The trench capacitor assembly comprises a conductive region located on the substrate; the grooves are located in the conductive area and are adjacent in sequence, the side walls of the grooves are bent faces protruding towards the conductive area, every two adjacent grooves are separated by the side walls, and the conductive area serves as a first pole plate of the groove capacitor assembly; the dielectric layers are located on the side walls, and the dielectric layers of every two adjacent grooves are continuous; and the conductive filling structure is positioned on the dielectric layer, fills each groove of the groove capacitor assembly, and is used as a second pole plate of the groove capacitor assembly. According to the invention, the effective capacitance value and capacitance density of semiconductor devices such as BCD and the like can be obviously improved.