A Review of UltraHigh Frequency Ultrasonic Transducers

Abstract

The ultrahigh-frequency (UHF) ultrasonic transducers are active in various fields, including nondestructive evaluation in the semiconductor industry, microscopic biological organization imaging in biomedicine, particle manipulation, and so on. In these fields ultrahigh-frequency (UHF) ultrasonic transducers play a critical role in the performance of related equipment. This article will focus on the topic of ultrahigh-frequency ultrasonic transducers’ preparation, and reviews three aspects: material selection, focus design, and acoustic energy transmission matching. Provides a summary of the current research status, and puts forward some views on the future development of UHF ultrasound devices.

Acoustic Characterization of Transmitted and Received Acoustic Properties of Air-Coupled Ultrasonic Transducers Based on Matching Layer of Organosilicon Hollow Glass Microsphere

“…Table 4 exhibits the results of the substrate examinations. Epoxy resins are commonly utilized as a substrate for the matching layers of ultrasonic transducers due to their cost-effectiveness [27], with a hardness up to Shore D70 or even higher. However, they have a higher acoustic impedance and acoustic attenuation.…”

The Effect of Ultrasound Frequency on the Harmful Algal Species: Pyrodinium bahamense var. compressum and Margalefidinium polykrikoides

“…This is because the exposure time needs to be increased to remove higher cells with low ultrasound frequency. Increasing the exposure time will be caused the increase in power input that leads to higher electrical power consumption and will affect the electrical cost increase (Chen et al, 2022). So this lowest frequency is not economical for harmful algae removal.…”

“…It has been demonstrated that ultrasound has a detrimental effect on organism structural and functional status, and hence, sonication is applied to reduce cyanobacterial blooms in eutrophic water (Phull et al, 1997;Lee et al, 2010). Research has found that sonication inhibits the growth rate of cyanobacteria by causing the rupture or collapse of gas vesicles due to cavitational effects, membrane disruption, damage to photosynthetic activity, and inhibition of cell division and cell cycle; the extent of the damage and thus bloom control is dependent on parameters such as ultrasonic frequency, power intensity, and exposure duration (Chen et al, 2022). Although it may lead to the release of toxins due to cyanobacterial cell lysis (Song et al, 2005 ;Purcell et al, 2013 ), sonication has also been reported to be effective in degrading the cyanotoxins (Song et al, 2005).…”

An Emerging Era: Conformable Ultrasound Electronics

“…In some work, the focused lenses were added to achieve focused imaging without a destructive pressing effect on the piezoelectric element. [ 177 ] However, the lower sensitivity due to attenuative losses and the mechanical quality of the lens limited its practical application. [ 178 ] In recent studies, with the development of novel piezoelectric materials and composites, planar single‐element transducers have always been fabricated and characterized using standard methods to check the performance of new materials because of their simplest configuration.…”