Electrostatic capacitance element, method of manufacturing electrostatic capacitance element, and resonance circuit
A technology of electrostatic capacitance and resonant capacitor, which is applied in the direction of electrical components, fixed capacitor electrodes, fixed capacitor dielectrics, etc., can solve the problem of suppressing the received signal level, and achieve the effect of stable manufacturing
Inactive Publication Date: 2012-05-02
SONY CORP
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- Abstract
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Problems solved by technology
After the capacitance change, the received signal at the resonant frequency f 0 The response at is lower than before the capacitance change, thus suppressing the level of the received signal
Method used
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no. 1 example
[0041] 1. First Embodiment: Variable Capacitance Element
[0042] 1-1 First construction example
[0043] 1-2 Second Construction Example
[0044] 1-3 Third Construction Example
no. 2 example
[0045] 2. Second Embodiment: Variable Capacitance Element
[0046] 2-1 First construction example
[0047] 2-2 Second Construction Example
no. 3 example
[0048] 3. Third Embodiment: Variable Capacitance Element
[0049] 3-1 First Construction Example
[0050] 3-2 Second Construction Example
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Abstract
An electrostatic capacitance element includes: a dielectric layer; and a pair of electrodes or a plurality of pairs of electrodes having one electrode formed on one surface of the dielectric layer and the other electrode formed on the other surface of the dielectric layer by interposing the dielectric layer therebetween. The one electrode and the other electrode are arranged such that longitudinal directions of the electrodes intersect with each other. In addition, the one electrode and / or the other electrode have at least two electrode widths. In a case where the one electrode is formed to be relatively shifted with respect to the other electrode, an area of the electrodes overlapping in a thickness direction of the dielectric layer by interposing the dielectric layer can be changed in a continuous manner or a stepwise manner.
Description
technical field [0001] The present invention relates to an electrostatic capacitance element and a resonant circuit having the same, more specifically, to an electrostatic capacitance element having a small capacitance of pF level, a manufacturing method of the electrostatic capacitance element, and a resonant circuit having the same. Background technique [0002] In the related art, a variable capacitance element has been used, and the variable capacitance element controls the frequency or time of the input signal through an externally applied bias signal, so as to change the capacitance. For example, commercially available variable capacitance diodes (varicap diodes) and micro electro mechanical systems (MEMS) can be used as variable capacitance elements. [0003] In addition, a technique has been proposed in which the above-mentioned variable capacitance element is used as a protection circuit in a contactless integrated circuit (IC) card (for example, refer to Japanese U...
Claims
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Patent Timeline
Login to View More IPC IPC(8): H01G5/04H03H9/15
CPCH01G4/012H01G4/30H01G4/06H01G5/011H01G7/06
Inventor 管野正喜
Owner SONY CORP
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