Abstract
In the paper, the results of production of Ag inkjet printed interdigital transducers to the acoustic delay line based on Y-cut X-propagation direction of lithium niobate plate for the frequency range from 1 to 14 MHz are presented. Additionally, morphological, structural, and electro-physical characteristics of the obtained electrodes were investigated. Mathematical modeling of the excitation of acoustic waves by these electrode structures was carried out. Comparison of the theoretical results with experimental ones showed their qualitative and quantitative coincidences. It was shown that conventional inkjet printing can replace the complex photolithographic method for production of interdigital transducers for acoustic delay lines working up to 14 MHz. The resulting electrode structures make it possible to efficiently excite acoustic waves with a high value of electromechanical coupling coefficient in piezoelectric plates.
Highlights
In recent years, work has been actively carried out in the field of creating various electrode structures by the direct inkjet printing [1]
The printed samples were annealed to obtain a homogeneous surface of the electrodes and remove the residual organic solvent from the ink
The electrode structure of the delay line based on YX LiNbO3 for excitation of the plate acoustic waves was created by inkjet printing using silver nano ink
Summary
Work has been actively carried out in the field of creating various electrode structures by the direct inkjet printing [1]. It should be noted that inkjet printing can be performed on both rigid and flexible substrates [1,8,9,10] This method is allowed to produce 3D structures and electronic components of a large area [10,11,12]. In order to avoid agglomeration, which leads to clogging of nozzles and poor-quality printing, the nanoparticles are stabilized by amphiphilic molecules of polyacrylic acid (PAA) or polyvinylpyrrolidone (PVP) [16,17,18,19]. After printing and drying the solvent, all of the above inks require annealing This is due to the fact that, the ink contains metal nanoparticles, they are Sensors 2020, 20, 3349; doi:10.3390/s20123349 www.mdpi.com/journal/sensors
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