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논문 기본 정보

자료유형
학술저널
저자정보
Un-Hyun Lim (Ajou University) Jin-Hee Yoo (Ajou University) Vijay Kondalkar (Ajou University) Keekeun Lee (Ajou University)
저널정보
대한전기학회 Journal of Electrical Engineering & Technology Journal of Electrical Engineering & Technology Vol.13 No.6
발행연도
2018.11
수록면
2,434 - 2,440 (7page)

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초록· 키워드

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A new type of piezoelectric micromachined ultrasonic transducer (pMUT) with high resonant frequency was developed by using a thin lead zirconate titanate (PZT) as an insulation layer on a floating 10 ㎜ silicon membrane. The PZT insulation layer facilitated acoustic impedance matching at active pMUT, leading to a high performance in the acoustic conversion property compared with the transducer using SiO₂ insulation layer. The fabricated ultrasonic devices were wirelessly measured by connecting two identical acoustic transducers to two separate ports in a single network analyzer simultaneously. The acoustic wave emitted from a transducer induced a 3.16 ㎽ on the other side of the transducer at a distance of 2 ㎝. The transducer performances in terms of device diameters, PZT thickness, annealings, and different DC polings, etc. were investigated. COMSOL simulation was also performed to predict the device performances prior to fabrication. Based on the COMSOL simulation, the device was fabricated and the results were compared.

목차

Abstract
1. Introduction
2. Optimal Design and Simulation
3. Fabrication and Poling Process
4. Results
5. Conclusion
References

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UCI(KEPA) : I410-ECN-0101-2018-560-003535782