本文介绍了一种新型圆形振动膜ZnO压电微传声器的制备,并对传声器制备的工艺过程进行了较为详细的描述。圆形振动膜的压电传卢器与以前方形振动膜结构设计相比,较大幅度提高了传声器的灵敏度和成品率,灵敏度达到-70dB(相对于1V/Pa),成品率达到80%。
This paper presents the fabrication of a silicon based ZnO piezoelectric micromicrophone with novel circular vibrating film. Micromachined techniques to fabricate the device are described in detail. The circular vibrating film structure of this microphone is a modification of the rectangular one, and the performances of the device are improved. The sensitivity is -70dB (ref. 1V/Pa) and the rate of finished product is 80%.