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Variable thickness diaphragm for a wideband robust piezoelectric micromachined ultrasonic transducer (PMUT)
Variable thickness diaphragm for a wideband robust piezoelectric micromachined ultrasonic transducer (PMUT)
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机译:宽带坚固型压电微机械超声换能器(PMUT)的可变厚度膜片
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摘要
A diaphragm for a piezoelectric micromachined ultrasonic transducer (PMUT) is presented having resonance frequency and bandwidth characteristics which are decoupled from one another into independent variables. Portions of at least the piezoelectric material layer and backside electrode layer are removed in a selected pattern to form structures, such as ribs, in the diaphragm which retains stiffness while reducing overall mass. The patterned structure can be formed by additive, or subtractive, fabrication processes.
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