32results about How to "Reduce Capacitance Variation" patented technology

A display comprising: an electro-optical material arranged between first and second planes facing each other; a first substrate arranged on the first plane and including a conductor that affords an electrical signal to the electro-optical material; a first electrically conductive film arranged on the second plane to afford an electrical signal to the electro-optical material; a second electrically conductive film arranged outside an area sandwiched between the first and second planes; and a current detection circuit that detects the current on the second electrically conductive film. The display further comprises a control circuit that, during a time period the current is detected by the current detection circuit, applies substantially the same voltage as that applied to the second electrically conductive film to one of the conductor and the first electrically conductive film, which is arranged more proximate to the second electrically conductive film, and sets the other in a floating state, or applies substantially the same voltage as that applied to the second electrically conductive film to both the conductor and the first electrically conductive film.

Wirings mainly containing copper are formed on an insulating film on a substrate. Then, after forming insulating films for reservoir pattern and a barrier insulating film, an insulating film for suppressing or preventing diffusion of copper is formed on upper and side surfaces of the wirings, the insulating film on the substrate, and the barrier insulating film. Here, thickness of the insulating film for suppressing or preventing diffusion of copper at the bottom of a narrow inter-wiring space is made smaller than that on the wirings, thereby efficiently reducing wiring capacitance of narrow-line pitches. Then, first and second low dielectric constant insulating films are formed. Here, a deposition rate of the first insulating film at an upper portion of the side surfaces of facing wirings is made higher than that at a lower portion thereof, thereby forming air gaps. Finally, the second insulating film is planarized by interlayer CMP.

An antenna is constituted in which a variable capacitance capacitor portion Ct is connected between an antenna element and a ground. In the variable capacitance capacitor, a plurality of variable capacitance elements using a thin film dielectric layer whose dielectric constant is changed by a voltage applied are connected in parallel with regard to direct current component and in series with regard to high frequency component between an antenna-element-side terminal and a ground-side terminal. The capacitance change ratio of the variable capacitance capacitor that depends on the bias signal can be utilized to the maximum so as to perform impedance matching so that the electrical length of the antenna element is changed, and thus, the operating frequency can be changed. In addition, the antenna having small waveform distortion and intermodulation distortion, high power handling capability and low loss at high frequencies can be realized.

A sensor for determining the presence of an analyte is disclosed comprising a reactive layer disposed between a base plate and a movable plate. The reactive layer is configured to interact with an analyte effecting a change in capacitance between the base plate and movable plate. When the analyte has a polarity or overall Hildebrand solubility parameter that is similar to the reactive layer, the change in capacitance is caused by a swelling of the reactive layer as analyte is absorbed into the reactive layer. This results in a decrease in capacitance. When the analyte has a solubility parameter not near the reactive layer, the absorbed analyte causes the reactive layer's total polarity to increase, an effect that dominates swelling. This causes an increase in capacitance. A capacitive sensing circuit is included for measuring the change in capacitance which is indicative of the analyte exposed to the sensor.

A touch screen includes a first shield wiring surrounding a plurality of sensor wirings and a plurality of lead wirings, and capacitors. The distance between the first shield wiring and the outermost lead wiring which is the outermost wiring, out of the plurality of lead wirings, is larger than the intervals between the plurality of lead wirings. The capacitors are constituted by first and second electrodes including extending portions which extend in the extending direction.

Systems and methods for arranging parallel wires to reduce the capacitance variations. In one embodiment, multiple first components arranged as a linear array are coupled to a second component at the end of this linear array by corresponding signal wires. Each signal wire has a perpendicular portion extending perpendicular to the direction of the linear array, and a parallel portion which runs parallel to the direction of the linear array. The parallel portions are staggered so that longer ones of the parallel portions are adjacent to the shorter ones of the parallel portions, instead of simply being arranged from longest to shortest. In one embodiment, the longer half of the parallel portions decrease in length across the series of parallel portions, while the shorter half of the parallel portions increase in length. In another embodiment, successively longer / shorter parallel portions alternate sides of the series.

The present provides a variable capacitance element enabling a further reduction in capacitance variation among variable capacitance elements, and provides a packaged circuit including the variable capacitance element. A variable capacitance element is configured to include an element body unit, a compensation unit, a first external terminal for signals, a second external terminal for signals, external terminals for control, and external terminals for capacitance compensation. The compensation unit has second variable-capacitance capacitor units C9 to C 11, each including a second dielectric layer formed of a ferroelectric material, and is connected to the element body unit, and has a capacitance varying according to a control voltage signal.