Electret polarization device and method for polarization by adopting same

Abstract

The invention is suitable to the technical field of polarization and provides an electret polarization device and a method for polarization by adopting the same. The polarization device comprises a needle electrode, a direct-current high-voltage power source and a metal base which are sequentially connected in series, wherein more than two coils are arranged between the needle electrode and the metal base, and the more than two coils are same in size and parallel to the metal base, have sequentially increasing energizing currents and are coaxially arranged at intervals. In the invention, by arranging more than two coils, which are same in size and parallel to the metal base, have sequentially increasing energizing currents and are coaxially arranged at intervals, between the needle electrode and the metal base, charges can be furled and concentrated into a small range, the quantity of electric charges in unit area on the electret is increased, and more charges can be captured by a deep well.

Description

technical field [0001] The invention belongs to the field of polarization technology, in particular to an electret polarization device and a polarization method using the polarization device. Background technique [0002] With the rapid development of the electronic industry, the demand for electret condenser microphones is increasing, and the functions are constantly improving and perfecting. In the production process of the electret condenser microphone, the polarization process of the electret is particularly critical. [0003] At present, ordinary electret polarization devices such as figure 1 As shown, it includes a metal base 103, a DC high voltage power supply 104 and a needle electrode 101 connected in series in sequence. When polarizing, place the electret 102 coated with the film body to be polarized on the metal base 103 for polarization, and the needle-shaped electrode 101 can generate electron beams to radiate to the electrode to be polarized under the DC high...

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Problems solved by technology

[0005] The purpose of the embodiments of the present invention is to provide an electret polarization device, aiming at solving the problem that ordinary electret polarization devices cannot concentrate a large amount of charges to a fixed area, and cannot effectively improve the polarization of the electret. The problem of the amount of charge per unit area of ​​a polar body

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