Ceramic dielectric variable capacitor and preparation method thereof

Abstract

The invention discloses a ceramic dielectric variable capacitor and a preparation method thereof. The ceramic dielectric variable capacitor comprises conductive rubber with a fixed electrode dielectric ceramic body and a variable electrode, the dielectric ceramic body is of a cylindrical structure, and conductive rubber of the variable electrode is of a semi-spherical cylindrical structure, and the diameter of the conductive rubber is equivalent to that of a fixed electrode of the ceramic body. The ceramic dielectric variable capacitor is applied to an active capacitance pen for touch screen writing, the capacitance of the ceramic dielectric variable capacitor changes along with the change of writing force in the writing process of the capacitance pen, and the writing effect of an actual pen is achieved.

Description

technical field [0001] The invention belongs to the technical field of electronic ceramics, and particularly relates to a ceramic-dielectric variable capacitor and a preparation method thereof. Background technique [0002] In modern society, under the trend of the substantial increase in the ownership and usage of mobile phones, tablet computers, learning machines, and human-machine interfaces, more and more software and human-machine interface terminal devices require higher-precision touch, such as calligraphy software, painting Software, electronic signature, etc., so the touch screen stylus is more widely used, so the performance requirements for the stylus are getting higher and higher. The touch screen stylus is divided into three technical routes, inductive pen, passive capacitive pen and active capacitive pen (active capacitive pen). Inductive pen needs to add a layer of inductive sensor on the touch screen, the thickness and cost of the touch screen will increase, ...

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Problems solved by technology

[0006] To sum up, the active capacitive pen requires the capacitance to change with the writing force. The ceramic dielectric fixed capacitor in the front is not suitable. The latter pre-adjusts the variable capacitor to adjust the capacitance by rotating, and the pressure is converted into rotational force. It is difficult to achieve in the small space of the pen tube, and the pre-adjustment variable capacitor is used for micro-adjustment of the circuit, and it is not used continuously without interruption, which is not suitable for the capacitive pen at all.

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