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Manufacturing method of multi-layer piezoelectric loudspeaker oscillator and multi-layer piezoelectric loudspeaker oscillator

A technology for piezoelectric speakers and manufacturing methods, applied in the manufacture of multilayer piezoelectric speaker vibrators, in the field of multilayer piezoelectric speaker vibrators, can solve problems such as failure, prone to fatigue, and impact on product life, and achieve high density and glue The effect of high adhesive strength and guaranteed reliability

Active Publication Date: 2013-07-10
GUANGDONG JC TECHNOLOGICAL INNOVATION ELECTRONICS CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

During the continuous working process, the components prepared in this way are prone to fatigue due to the influence of vibration, leading to failure and affecting the life of the product

Method used

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  • Manufacturing method of multi-layer piezoelectric loudspeaker oscillator and multi-layer piezoelectric loudspeaker oscillator
  • Manufacturing method of multi-layer piezoelectric loudspeaker oscillator and multi-layer piezoelectric loudspeaker oscillator
  • Manufacturing method of multi-layer piezoelectric loudspeaker oscillator and multi-layer piezoelectric loudspeaker oscillator

Examples

Experimental program
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Effect test

Embodiment 1

[0028] see figure 1 , This embodiment provides a method for manufacturing a multilayer piezoelectric speaker vibrator. Internal electrodes are screen-printed or sputtered on both sides of a single ceramic sheet, and multiple piezoelectric sheets are bonded layer by layer by using an adhesive process. The multilayer piezoelectric ceramic is prepared by heating and curing, and then the overall polarization and bonding of the metal substrate are made into a multilayer piezoelectric loudspeaker vibrator. Specifically include the following steps:

[0029] 101: The piezoelectric ceramic powder is subjected to wet grinding, and a binder is added to the ground piezoelectric ceramic powder to obtain a cast green sheet by a tape casting process, and the laminated sintering process is used to prepare the cast green sheet. The cast green sheets are processed to produce individual ceramic sheets.

[0030] In this embodiment, preferably, the thickness of the casting film is 10-200 microns...

Embodiment 2

[0047] This embodiment provides a multilayer piezoelectric loudspeaker vibrator manufactured by the method in Embodiment 1, including: N layers of piezoelectric sheets, wherein the N is an odd number greater than 3, and among the N layers of piezoelectric sheets The upper electrodes of the first layer of piezoelectric sheets are connected to the lower electrodes of the even-numbered piezoelectric sheets in the N-layer piezoelectric sheets and the upper electrodes of the odd-numbered piezoelectric sheets in the N-layer piezoelectric sheets through the outer conductive strips, so The lower electrode of the first layer of piezoelectric sheets and the upper electrode of the even-numbered piezoelectric sheets of the N piezoelectric sheets and the lower electrode of the odd-numbered piezoelectric sheets below the first layer of piezoelectric sheets pass through the outside The conductive strips are connected, wherein the outer surfaces of the first piezoelectric sheet and the Nth pie...

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Abstract

The invention discloses a manufacturing method of a multi-layer piezoelectric loudspeaker oscillator and the multi-layer piezoelectric loudspeaker oscillator, and belongs to the field of piezoelectric elements. The manufacturing method of the multi-layer piezoelectric loudspeaker oscillator comprises the following steps of carrying out wet grinding on piezoelectric ceramic powder, adding adhesives into the piezoelectric ceramic powder after grinding, using a tape casting process to obtain tape casting blank pieces, using a lamination sintering process to process the tape casting blank pieces to obtain a single ceramic piece; using a mode of adhesion exudation electrode to prepare electrodes on two surfaces of the single ceramic piece so as to obtain a single piezoelectric plate; and using an adhesion process to bond N piezoelectric plates layer by layer according to a connecting method of external electrodes to obtain an N-layer piezoelectric plate, heating the N-layer piezoelectric plate to solidify the N-layer piezoelectric plate so as to enable the N-layer piezoelectric plate to be integral, carrying out polarization on the integral N-layer piezoelectric plate, bonding the N-layer piezoelectric plate after polarization and a metal piece to obtain an N-layer piezoelectric loudspeaker oscillator.

Description

technical field [0001] The invention relates to the field of piezoelectric elements, in particular to a manufacturing method of a multilayer piezoelectric loudspeaker vibrator and the multilayer piezoelectric loudspeaker vibrator. Background technique [0002] Multilayer piezoelectric speakers are mainly used in consumer electronics industries such as mobile phones, digital cameras, digital video cameras, MP3, MP4, portable audio-visual products and handheld electronic game consoles. Compared with traditional dynamic speakers, it has the advantages of miniaturization, high efficiency, energy saving, and no electromagnetic interference; under the current trend of device miniaturization, it has extremely broad prospects and future. [0003] The key component of the multilayer piezoelectric speaker is the multilayer piezoelectric speaker vibrator. In the prior art, the multilayer piezoelectric speaker vibrator with the above characteristics and functions is usually realized by ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04R17/10H04R31/00B32B18/00B32B37/12
Inventor 钟友良周长印周涛文理欧明姜知水田维
Owner GUANGDONG JC TECHNOLOGICAL INNOVATION ELECTRONICS CO LTD