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首页> 外文期刊>IEEE Transactions on Ultrasonics, Ferroelectrics, and Frequency Control >Dry-contact technique for high-resolution ultrasonic imaging
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Dry-contact technique for high-resolution ultrasonic imaging

机译：干接触技术用于高分辨率超声成像

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摘要

To accomplish a high-resolution ultrasonic imaging without wetting a sample, the efficiency of the dry-contact ultrasonic transmission is discussed. In this study, a dry-contact interface is formed on a sample by inserting a thin film between water and a sample, and the pressure is working on the interface by evacuating the air between the film and the sample. A model of dry-contact ultrasonic transmission is presented to assess the signal loss accompanied with the transmission. From the determination of the signal loss caused by the transmission using various films, it was found that the higher frequency ultrasound is transmitted effectively into the sample by selecting an optimum film, which can keep the displacement continuity between the film and the sample during ultrasonic transmission. Finally, ultrasonic imaging with the sufficient signal-to-noise ratio (SNR) and high lateral resolution was performed on the delamination in a package and the jointing interface of the ball-grid-array package without wetting the packages.
机译：为了在不润湿样品的情况下完成高分辨率超声成像，讨论了干接触超声传输的效率。在这项研究中，通过在水和样品之间插入薄膜来在样品上形成干接触界面，并且通过排空薄膜和样品之间的空气来使界面上的压力起作用。提出了一种干式超声波传输模型，以评估伴随传输的信号损失。通过确定使用各种薄膜进行传输所引起的信号损耗，发现通过选择最佳薄膜可以将高频超声波有效地传输到样品中，这样可以在超声波传输过程中保持薄膜与样品之间的位移连续性。最后，对包装中的分层和球栅阵列包装的接合界面进行了具有足够信噪比（SNR）和高横向分辨率的超声成像，而没有弄湿包装。

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