Full-coverage surface acoustic wave interdigital transducer

Abstract

The invention relates to the technical field of transducers, in particular to a full-coverage surface acoustic wave interdigital transducer, which comprises two full-coverage transducers and a micro-channel. When the two transducers are simultaneously started, an enhanced standing wave sound field is formed in the micro-channel under the control of a same-frequency signal and is used for controlling biological particles in the channel. When one of the energy converters is started, the energy converter forms an enhanced traveling wave sound field in the micro-channel, and the enhanced travelingwave sound field is used for controlling biological particles (biomicroparticles and bionanopicles) in the channel. On the premise of not changing the original processing technology, materials and acontrol system, the processing technology is simplified; by optimizing the structural design of the interdigital transducer, the intensity and controllability of a sound field in the channel are greatly improved when a certain included angle is formed between the surface acoustic wave interdigital transducer and the micro-channel, and sound field coverage enhancement and most effective sound fieldcontrol are achieved in the micro-channels of different shapes. Under the condition of the same input power, the control efficiency of patterned arrangement, separation, purification and the like ofbiological particles can be greatly improved.

Description

Technical field [0001] Technical Field The present invention relates to transducers, in particular, it relates to full overlay SAW interdigital transducer. Background technique [0002] Currently, the presence of the interdigital surface wave power consumption, low efficiency and flux while the transducer manipulation of biological particles in the micro-channel complex. Especially when long tradition interdigital transducers form a certain angle with the direction of the fluid, the fluid between the transducer and the sample containing the non-existence of a wide range of transducers coverage area, conventional devices do not make full use of the transducer filter material effective design, and directly led to loss of the surface acoustic wave energy, to reduce sample handling capacity. Therefore, we propose full overlay SAW interdigital transducer. Inventive content [0003] Based on the technical problem of the background art, the present invention provides full coverage SAW ...

AI Technical Summary

Problems solved by technology

[0003] Based on the technical problems in the background technology, the present invention proposes a full-coverage surface acoustic wave interdigital transducer, which can generate greater acoustic radiation force on biological particles, greatly improving the patterned arrangement, separation and purification of biological particles, etc. The characteristics of control efficiency solve the problem of low control ability of existing surface acoustic wave interdigital transducers when they cooperate with micro-channels for biological particle control

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