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Communication Dans Un Congrès Année : 2008

Design And Fabrication of Condenser Microphone Using Wafer Transfer And Micro-electroplating Technique

Résumé

A novel fabrication process, which uses wafer transfer and micro-electroplating technique, has been proposed and tested. In this paper, the effects of the diaphragm thickness and stress, the air-gap thickness, and the area ratio of acoustic holes to backplate on the sensitivity of the condenser microphone have been demonstrated since the performance of the microphone depends on these parameters. The microphone diaphragm has been designed with a diameter and thickness of 1.9 mm and 0.6 µm, respectively, an air-gap thickness of 10 µm, and a 24% area ratio of acoustic holes to backplate. To obtain a lower initial stress, the material used for the diaphragm is polyimide. The measured sensitivities of the microphone at the bias voltages of 24 V and 12 V are -45.3 and -50.2 dB/Pa (at 1 kHz), respectively. The fabricated microphone shows a flat frequency response extending to 20 kHz.

Domaines

Autre [cs.OH]
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Dates et versions

hal-00277746 , version 1 (07-05-2008)

Identifiants

Citer

Zhen-Zhun Shu, Ming-Li Ke, Guan-Wei Chen, Ray Hua Horng, Chao-Chih Chang, et al.. Design And Fabrication of Condenser Microphone Using Wafer Transfer And Micro-electroplating Technique. DTIP 2008, Apr 2008, Nice, France. pp.386-390. ⟨hal-00277746⟩

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