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ULTRASOUND TRANSDUCER AND ULTRASOUND DIAGNOSTIC APPARATUS

专利权人:: Katsuhiro WAKABAYASHI;Satoshi YOSHIDA;Kazuhisa KARAKI;Mamoru HASEGAWA;Jin HIRAOKA;Kazuya MATSUMOTO

发明人:: Kazuya MATSUMOTO,Katsuhiro WAKABAYASHI,Jin HIRAOKA,Kazuhisa KARAKI,Mamoru HASEGAWA,Satoshi YOSHIDA

申请号：: US13614168

公开号：: US20130018269A1

申请日:: 2012.09.13

申请国别(地区):: US

年份:: 2013

代理人:

摘要：

An ultrasound transducer includes a substrate and a lower electrode layer, a lower insulating layer, an upper insulating layer, and an upper electrode layer. The lower insulating layer and the upper insulating layer are arranged to be opposed to each other via an air gap section. The upper insulating layer and the lower insulating layer are different in a material and thickness and satisfy Equation 1 below. In Equation 1, K1 represents a relative dielectric constant of the lower insulating layer, K2 represents a relative dielectric constant of the upper insulating layer, T1 represents thickness of the lower insulating layer, T2 represents thickness of the upper insulating layer, ρ1(x) represents a charge density distribution in the lower insulating layer, and ρ2(y) represents a charge density distribution in the upper insulating layer.

\begin{matrix} \frac{1}{K 1} \int_{0}^{T 1} x \times ρ 1 (x) \partial x = \frac{1}{K 2} \int_{0}^{T 2} y \times ρ 2 (y 来源网站： 中国工程科技知识中心来源网址： http://www.ckcest.cn/home/相关文献 相关成果 相关专利相关发明人 chiavarini, mario ciottoli, giovanni battista fazio, antonello iacoangeli, tommaso marchetti, marcello levy, laurent 相关专利 OSCILLATEUR ULTRASONORE ET DISPOSITIF DE DIAGNOSTIC ULTRASONORE Human body model for wireless signal measurements MULTIFREQUENCY ELECTRICAL IMPEDANCE IMAGING USING LORENTZ FIELDS LOW-DIELECTRIC CONSTANT CRYPTOCRYSTAL LAYERS AND NANOSTRUCTURES Imaging apparatus and endoscope置顶 我的订单 意见反馈function hideDiv() {
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