Paper-based micro-flow switch controlled by surface acoustic wave
A surface acoustic wave, micro-based technology, applied in laboratory containers, laboratory utensils, chemical instruments and methods, etc., can solve problems such as unfavorable micro-flow automatic analysis
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[0023] The present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments.
[0024] A surface acoustic wave controlled paper-based microfluidic switch proposed by the present invention, as shown in the figure, mainly includes a signal generating device 1 and a piezoelectric substrate 2, the upper surface of the piezoelectric substrate 2 is a working surface, and the piezoelectric On the working surface of the substrate 2, there are two IDTs 3 used to excite surface acoustic waves and two IDTs 3 used to reflect the surface acoustic waves excited by the existing microelectronics process. A reflective grid 4 that reduces the power of the RF signal, the two interdigital transducers 3 have the same size and are located on both side edge regions of the symmetrical working surface of the piezoelectric substrate 2, and the position of the reflective grid 4 is closer to the piezoelectric substrate. side of piece 2. A switch as...
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