Variable capacitor and production method thereof

Abstract

The invention discloses a variable capacitor and a production method thereof. The variable capacitor comprises a soft upper diaphragm, a separator and a soft lower diaphragm which are sequentially stacked, dielectric with a high dielectric constant is arranged between the upper diaphragm and the lower diaphragm, an upper circuit is arranged on one side of the upper diaphragm opposite to the dielectric, the head end of the upper circuit corresponds to the size and the position of the dielectric, a lower circuit is arranged on one side of the lower diaphragm opposite to the dielectric, the head end of the lower circuit corresponds to the size and the position of the dielectric, and the separator is arranged on the side face or the edge of the upper surface of the dielectric, so that the dielectric is separated from the head end of the upper circuit. As the dielectric is arranged between the two circuits, capacitance is changed by changing stress, initial capacitance is zero and is changed under the action of external force, and the variable capacitor is simple in structure and production process and high in reliability.

Description

technical field [0001] The invention relates to the field of electronic components, in particular to a variable capacitor and a production method thereof. Background technique [0002] The design and manufacturing level of today's electronic products is constantly improving, and the user experience requirements are constantly improving. In many use cases, it is necessary to control and measure the physical changes in the outside world, and it is necessary to reflect the physical changes and make corresponding changes. the response to. Among them, capacitive switch and pressure measurement are the most advanced technologies, which can be applied in many technical fields, such as the stylus used in various input devices, which can reflect the strength of handwriting when writing, or reflect the user's use The response of the device, at this time, it is necessary to measure the handwriting strength within a certain period of time through related equipment and software to measu...

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Problems solved by technology

[0005] The above-mentioned technical solutions have obvious deficiencies, which are mainly manifested in: the complex manufacturing process of the device, poor reliability, such as waterproof, dustproof, difficult to withstand large pressure, large stroke of the pressure contact and low positioning accuracy of the device, high assembly requirements for the lead-out electrodes, no flexibility, poor reliability, etc.

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