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1. 发明授权

US07942568B1 Active micromixer using surface acoustic wave streaming 有权
标题翻译：使用表面声波流动的有源微混合器
公开(公告)号：US07942568B1
公开(公告)日：2011-05-17
申请号：US11155108
申请日：2005-06-17
申请人： Darren W. Branch , Grant D. Meyer , Harold G. Craighead
发明人： Darren W. Branch , Grant D. Meyer , Harold G. Craighead
IPC分类号： B01F11/02
CPC分类号： B01F11/0266 , B01F13/0059 , Y10S366/04
摘要： An active micromixer uses a surface acoustic wave, preferably a Rayleigh wave, propagating on a piezoelectric substrate to induce acoustic streaming in a fluid in a microfluidic channel. The surface acoustic wave can be generated by applying an RF excitation signal to at least one interdigital transducer on the piezoelectric substrate. The active micromixer can rapidly mix quiescent fluids or laminar streams in low Reynolds number flows. The active micromixer has no moving parts (other than the SAW transducer) and is, therefore, more reliable, less damaging to sensitive fluids, and less susceptible to fouling and channel clogging than other types of active and passive micromixers. The active micromixer is adaptable to a wide range of geometries, can be easily fabricated, and can be integrated in a microfluidic system, reducing dead volume. Finally, the active micromixer has on-demand on/off mixing capability and can be operated at low power.
摘要翻译：有源微混合器使用在压电衬底上传播的表面声波，优选瑞利波，以在微流体通道中的流体中引起声流。可以通过将RF激励信号施加到压电基板上的至少一个叉指式换能器来产生表面声波。活性微混合器可以在低雷诺数流中快速混合静态流体或层流。活性微混合器没有移动部件（SAW传感器除外），因此比其他类型的有源和无源微混合器更可靠，对敏感流体的损害较小，并且不易受到结垢和通道堵塞的影响。活性微混合器适用于宽范围的几何形状，可以容易地制造，并且可以集成在微流体系统中，从而减少死体积。最后，有源微混频器具有按需开/关混合能力，可以低功耗运行。

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