Preparation method and application of surface-mounted miniature filter capacitor

Abstract

The invention belongs to the crossing technical field of filter capacitors, micro-nano manufacturing technologies and electronic circuits and discloses a preparation method and application of a surface-mounted miniature filter capacitor. A current collector (101) and an active material (102) are coated by adopting a graphical 3D silicon-based frame (100) to prepare an electrode of the capacitor, the electrode of the capacitor is fixed at a packaging shell lower part (103a), and an electrolyte (104) is smeared; and finally, a packaging shell upper part (103b) is used, conductive connection points are reserved, and conductive pins (105) are embedded into the shell to realize patch design of the conductive pins of the capacitor. According to the invention, the whole flow process of the surface-mounted miniature filter capacitor is designed, and the customized manufacturing of the surface-mounted electrode is realized through a semiconductor process; a simple packaging structure is adopted, so that the sealing is facilitated; the embedded conductive pins with adjustable sizes are manufactured to carry out spot welding type electric connection on the circuit board, so that the connection reliability and miniaturized integration are ensured. Finally, the filter capacitor is practically applied to a surface-mounted circuit board, and a filtering function is realized.

Description

technical field [0001] The invention belongs to the cross-technical field of filter capacitors, micro-nano manufacturing technology and electronic circuits, and more specifically, relates to a preparation method and application of a chip-type micro-filter capacitor, which is a customized manufacturing chip by means of micro-nano processing technology. The method of formulating miniature filter capacitors. Background technique [0002] The filter is an electrical component used to reduce or eliminate the influence of harmonics on the power system. It consists of a filter circuit composed of capacitors, inductors and resistors. Using its frequency selection function, you can filter out interference noise or perform spectrum analysis. For capacitors, its application fields are very wide, and it plays an important role in filtering, energy storage, bypass, coupling, timing, etc. in electronic circuits. Among these applications, filtering applications are the most common applic...

AI Technical Summary

Problems solved by technology

Due to the existence of the diaphragm, the traditional supercapacitor with a sandwich structure is prone to micro-short circuit, low ion transfer efficiency, and the upper and lower electrodes are not convenient for the bonding of the lead wire and the circuit board to conduct electricity.

At present, most filter capacitors are fixed and connected to the circuit board through two or more pins, which occupy a large area of ​​the circuit board and are not suitable for circuit boards with a small space, and the pins are easy to bend, and the fixed connection method is not reliable enough. Stable, not suitable for applications with strong shock or vibration

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