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Piezoelectric loudspeaker and method for forming same

A piezoelectric speaker and piezoelectric actuator technology, applied in piezoelectric/electrostrictive transducers, sensors, electrical components, etc., can solve problems such as high cost and complex process

Active Publication Date: 2015-07-29
WEIFANG GOERTEK MICROELECTRONICS CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] However, most traditional piezoelectric speakers are formed by micro-electromechanical (MEMS) technology, which is complex and costly.

Method used

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  • Piezoelectric loudspeaker and method for forming same
  • Piezoelectric loudspeaker and method for forming same
  • Piezoelectric loudspeaker and method for forming same

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Embodiment Construction

[0040] The inventor of the present invention has studied the forming method of the piezoelectric speaker in the prior art, and found that in the forming process of the existing piezoelectric speaker, the MEMS manufacturing process is usually adopted, for example, including photolithography, patterning and etching, etc. process, resulting in a high manufacturing cost of the piezoelectric speaker.

[0041] Based on the above studies, the inventors of the present invention have proposed a method for forming a piezoelectric speaker, providing a piezoelectric actuator and a speaker frame, the speaker frame includes a base and a raised structure on the base, in The top of the raised structure forms a solder layer, and then the piezoelectric actuator and the speaker frame are combined through the solder layer, and the piezoelectric actuator can be completed only through the back-end process (BEOL) of semiconductor manufacturing. Combination of actuator and speaker pot. In addition, ...

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Abstract

The invention provides a piezoelectric loudspeaker and a method for forming the same. The method for forming the piezoelectric loudspeaker includes providing piezoelectric actuators; providing loudspeaker frames; forming welding flux layers on the tops of protruded structures; combining bottom electrodes of the piezoelectric actuators with the loudspeaker frames by the welding flux layers. The piezoelectric actuators comprise piezoelectric material layers, the bottom electrodes and top electrodes. The loudspeaker frames comprise substrates and the protruded structures positioned on the substrates. The piezoelectric loudspeaker and the method for forming the piezoelectric loudspeaker have the advantages of simple process and low cost.

Description

technical field [0001] The invention relates to the field of acoustic-electric conversion, in particular to a piezoelectric speaker and a forming method thereof. Background technique [0002] As an electro-acoustic conversion device that can convert electrical energy into sound energy, speakers are widely used in electronic products. There are many types of speakers, and different types of speakers can make the diaphragm of the speaker vibrate through electromagnetic, electrostatic or piezoelectric effects, and resonate with the surrounding air to produce sound. [0003] In recent years, piezoelectric speakers have been developed, which realize electroacoustic conversion through the inverse piezoelectric effect of piezoelectric sheets. When audio power is applied to the two electrodes of the piezoelectric sheet, the vibration components of the piezoelectric speaker will expand or contract accordingly, thereby pushing the air and producing sound. Compared with traditional d...

Claims

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Application Information

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IPC IPC(8): H04R17/00H04R31/00
Inventor 邹泉波王喆
Owner WEIFANG GOERTEK MICROELECTRONICS CO LTD
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