Compact and wideband nanoacoustic pass-band filters for future 5G and 6G cellular radios

G Giribaldi, L Colombo, P Simeoni, M Rinaldi - nature communications, 2024 - nature.com
Over recent years, the surge in mobile communication has deepened global connectivity.
With escalating demands for faster data rates, the push for higher carrier frequencies …

6-20 GHz 30% ScAlN Lateral Field-Excited Cross-sectional Lame'Mode Resonators for future mobile RF Front-Ends

G Giribaldi, L Colombo, M Rinaldi - IEEE Transactions on …, 2023 - ieeexplore.ieee.org
This article reports on 30% scandium-doped AlN (ScAlN) lateral field-excited (LFE) cross-
sectional Lame'mode resonators (CLMRs) with unprecedented performance in the 6–20 …

High quality co-sputtering alscn thin films for piezoelectric lamb-wave resonators

S Shao, Z Luo, Y Lu, A Mazzalai… - Journal of …, 2022 - ieeexplore.ieee.org
Doped AlN thin films, especially high Sc-ratio AlScN film, have been reported to significantly
improve the piezoelectric properties and draw attention for high performance resonators …

Spurious-Free S₁ Mode AlN/ScAlN-Based Lamb Wave Resonator With Trapezoidal Electrodes

T Luo, Q Xu, Z Wen, Y Qu, J Zhou, B Lin… - IEEE Electron …, 2023 - ieeexplore.ieee.org
Spurious modes (SMs) suppression and electromechanical coupling coefficient ()
improvement in Lamb wave resonators (LWRs) have always been the research hotspot. In …

High-Crystallinity 30% Scaln Enabling High Figure of Merit X-Band Microacoustic Resonators for Mid-Band 6G

G Giribaldi, P Simeoni, L Colombo… - 2023 IEEE 36th …, 2023 - ieeexplore.ieee.org
This paper presents an experimental comparison of high-performance X-band piezoelectric
30% Sc-doped Aluminum Nitride (ScAlN) Cross-sectional Lamé Mode resonators (CLMRs) …

[HTML][HTML] High-fidelity patterning of AlN and ScAlN thin films with wet chemical etching

K Airola, S Mertin, J Likonen, E Hartikainen, K Mizohata… - Materialia, 2022 - Elsevier
We report on the anisotropic wet etching of sputtered AlN and Sc 0.2 Al 0.8 N thin films. With
tetramethyl ammonium hydroxide at 80° C, the etch rates along the c-axis were 330 and 30 …

Vertical and Lateral Etch Survey of Ferroelectric AlN/Al1−xScxN in Aqueous KOH Solutions

Z Tang, G Esteves, J Zheng, RH Olsson III - Micromachines, 2022 - mdpi.com
Due to their favorable electromechanical properties, such as high sound velocity, low
dielectric permittivity and high electromechanical coupling, Aluminum Nitride (AlN) and …

Structural characterization of the abnormal grains evolution in sputtered ScAlN films

M Li, K Hu, H Lin, Y Zhu - 2021 IEEE International Ultrasonics …, 2021 - ieeexplore.ieee.org
The mis-oriented abnormal grains embedded in the sputtered scandium aluminum nitride
(ScAlN) film degrade the film piezoelectric response. In this paper, we present for the first …

Robust Scandium Aluminum Nitride MEMS Resonators for L Band Operation in Orbital Environments

IW Dunk - 2021 - scholar.afit.edu
This thesis investigates AlN alloyed with scandium in a variety of resonator architectures
including WEM, overtone WEM, LEM, and SAW that have the potential to achieve high levels …

Machine Learning Assisted AlN Resonator Optimization Achieving 7.8% Coupling Coefficient with 70% Reduction in Time Expenditure

X He, C Ma, F Huang, L Liao, J Chen… - 2024 IEEE …, 2024 - ieeexplore.ieee.org
In our work, we present a machine learning-assisted optimization method that can generate
the optimal design parameters for the laterally coupled alternating thickness (LCAT) mode …