Analysis of fringing capacitance effect on the performance of micro-electromechanical-system-based micromachined ultrasonic air transducer

Micro & nano letters

article

Reshmi Maity¹  Niladri P. Maity¹  Koushik Guha²  Srimanta Baishya² 

[1] Department of Electronic and Communication Engineering, Mizoram University (A Central University);Department of Electronic and Communication Engineering, National Institute of Technology

关键词: ultrasonic transducers;    capacitance;    ultrasonic waves;    membranes;    finite element analysis;    micromechanical devices;    piezoelectric transducers;    microsensors;    micromachining;    silicon compounds;    capacitive transducers;    frequency 1.0 MHz to 10.0 MHz;    membrane displacement;    electrode separation;    capacitance effect;    micromachined ultrasonic air transducer;    ultrasonic waves;    silicon nitride membrane;    micromachined ultrasonic transducer;    biased membrane;    fringing capacitance effect;    microelectromechanical system;    medical imaging;    transducer;    MUT capacitor;    finite element method;    PZFLEX 3D simulator;    device structural parameters;   

DOI  :  10.1049/mnl.2017.0688

学科分类：计算机科学（综合）

来源: Wiley

【 摘 要 】

Acute suppurative parotitis (ASP) is a rare entity in early Infancy. The clinical presentation may be non-specific. Here, we describe a 70-day-old breast-fed female infant with massive purulent drainage from the mouth. Diagnostic workup such as ultrasound revealed purulent exudate from Stensen’s duct consistent with parotitis. Culture of the exudate showed growth of Staphylococcus Aureus . Based on the clinical presentations and ultrasound findings, the patient was diagnosed with right ASP. The patient respond­ed well to a 7-day antibiotic therapy and supportive measures. Thus ASP should be considered in the differential diagnosis of a neonatal parotid swelling and purulent drainage from the mouth, since early and prompt diagnosis prevents morbidity and complications. To the best of our knowledge it is the first documented case of ASP in early infancy in Iran.

【 授权许可】

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