Polarization process of the electret capacitance microphone

Abstract

The invention relates to a polarizing techniques of electrets capacitance model microphone, it adopting high-handed happening-equipment bring more then ten thousand volt DC voltage to let air engender happened ionization, then high voltage throw the electric ion coming from ionization air into electrets material, let electrets have electrification, the temperature of the polarizing techniques is 200-250 Deg.C. The invention is in charge relatively stable, if the microphone is adopted 260 Deg.C. temperature-resistant material to make of, then can seal from 260 Deg.C reflux-machine, its change of sensitivity can kept within 3dB, compared with the traditional microphone, the invention of the microphone is enhanced the stability, can exhibit patch model to product, therefore economize manpower and improve efficiency of produce.

Description

【Technical field】 [0001] The invention relates to a processing technology of an electret condenser microphone, in particular to a polarization process of the electret condenser microphone. 【Background technique】 [0002] The electret condenser microphone is an electronic component that converts acoustic signals into electrical signals, which can be applied to electronic products such as mobile phones, telephones, and MP3 players. Because the electret condenser microphone has the advantages of small size, convenient use, low price, and excellent performance, it is widely used in the world, and the global annual demand is hundreds of millions. [0003] The most important process in the production process of electret microphones is called polarization. The function of the polarization process is to permanently charge the electret material in the microphone to provide voltage to make the microphone work. The stability of the charge of the electret material determines the stabil...

AI Technical Summary

Problems solved by technology

[0005] At present, the polarization temperature of the microphone polarization process is at room temperature or around 50-100°C, and the performance of the microphone produced by it is relatively stable below 100°C. However, when the temperature exceeds 100°C, after several hours, the electret The surface potential decays relatively quickly, and its sensitivity changes more than ±3dB, resulting in unstable products. Therefore, it can only be suitable for manual soldering on circuit boards, and its production efficiency is relatively low.