Composite piezoelectric film and manufacture thereof
专利汇可以提供Composite piezoelectric film and manufacture thereof专利检索，专利查询，专利分析的服务。并且PURPOSE:To provide a composite piezoelectric film which has easy workability to a thin film, large piezoelectric effect, a plenty of flexibility and less ageing change by continuously changing the inorganic ferrodielectric powder density in thickness direction. CONSTITUTION:Inorganic ferrodielectric powder 2 is continuously changed in density in thickness direction in a composite piezoelectric film 1 in dispersed state. The density changing degree of the powder 2 can be controlled suitably by selecting the grain size, specific weight of the powder 2, specific viscosity and centrifugal force of the high molecular material and the like. In this manner acoustic impedance is continuously varied with respect to the thickness direction. Accordingly, a high molecular material layer 3 is disposed at the living body side as a living body supersonic probe to form an excellent piezoelectric element for supersonic probe for living body. When the layer 3 is used as a protective layer, it can also be used as a keyboard piezoelectric element.，下面是Composite piezoelectric film and manufacture thereof专利的具体信息内容。
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