Large-Area Flexible Ultrasonic Imaging System With an Organic Transistor Active Matrix
Large-Area Flexible Ultrasonic Imaging System With an Organic Transistor Active Matrix
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DOI：
10.1109/ted.2010.2044278
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发表时间：
2010-05-01
影响因子：
3.1
通讯作者：
Someya, Takao
中科院分区：
文献类型：
--
作者：
Kato, Yusaku;Sekitani, Tsuyoshi;Someya, Takao
我们成功地制作了一个大面积的灵活的超声成像系统，通过集成的聚合物超声换能器阵列片与有源矩阵的有机场效应晶体管。超声波片包括8 x 8个超声波传感单元，有效尺寸为25 x 25 cm（2）。有机晶体管的迁移率为0.1和0.5 cm（2）/V。s的低工作电压为1 mV，并在饱和状态下，分别。当在栅极接地的晶体管的源极和漏极之间施加交流信号时，在40 kHz的载波频率下，通/断比大于10（4）。在包括八个超声波单元的线性传感阵列中，串扰被抑制得足够低，并且开/关比超过10（4）。在自由空间中的图像被获得为多个目标对象在这个表。
We have successfully fabricated a large-area flexible ultrasonic imaging system by integrating a polymeric ultrasonic-transducer array sheet with an active matrix of organic field-effect transistors. The ultrasonic sheet comprises 8 x 8 ultrasonic sensing cells with an effective size of 25 x 25 cm(2). The organic transistors exhibit mobility of 0.1 and 0.5 cm(2)/V . s at the low operation voltage of 1 mV and in the saturation regime, respectively. When an ac signal is applied between source and drain electrodes for the transistors with a grounded gate, the on/off ratio is larger than 10(4) at the carrier frequency of 40 kHz. In the linear sensing array comprising eight ultrasonic cells, crosstalk is suppressed sufficiently low, and the on/off ratio exceeds 10(4). Images in free space are obtained for multiple-target objects over this sheet.