• Title/Summary/Keyword: 미세공정기반 트랜스듀서

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Design of piezoelectric micro-machined ultrasonic transducer for wideband ultasonic radiation in air (공기 중 광대역 초음파 방사용 압전 박막 기반 초소형 초음파 트랜스듀서의 설계)

  • Ahn, Hongmin;Jin, JaeHyeok;Moon, Wonkyu
    • The Journal of the Acoustical Society of Korea
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    • v.39 no.2
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    • pp.87-97
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    • 2020
  • In this paper, the design of piezoelectric Micro-machined Ultrasonic Transducer (pMUT) for wideband ultrasonic radiation in air was investigated. One of the methods to achieve wide frequency bandwidth in single device is modeling the transducer to multi-resonance system. The new pMUT was designed as a multi-resonance system with the addition of a suitable acoustic structure to the front and back of a thin film structure. A new pMUT consisting of thin film parts, radiation parts, and packaging parts is designed with a Lumped Parameter Model (L.P.M). Finally, it was validated as a Finite Element Method (FEM) simulation. The final designed pMUT achieved a frequency band of 102 kHz ~ 132 kHz (-3 dB).