MEMS-based piezoresistive and capacitive microphones: A review on materials and methods

Kumar, Ashish, Varghese, Arathy, Kalra, Dheeraj, Raunak, Anshuman, Jaiverdhan, Prasad, Mahanth, Janyani, Vijay and Yadav, R.P. 2024. MEMS-based piezoresistive and capacitive microphones: A review on materials and methods. Materials Science in Semiconductor Processing 169 , 107879. 10.1016/j.mssp.2023.107879

Full text not available from this repository.

Abstract

Microelectromechanical systems (MEMS)-based piezoresistive and capacitive microphones have gained significant attention due to their miniaturization, high performance, and diverse applications. This review paper provides a comprehensive overview of the materials and methods employed in these microphone technologies. We discussed various transduction mechanisms, including electrostatic, piezoresistive, and piezoelectric, along with their working principles and advantages. Additionally, we explored the utilization of surface acoustic wave (SAW) and bulk acoustic wave (BAW) resonators in microphone design. Performance characteristics such as sensitivity, noise floor, linearity, dynamic range, and bandwidth are analyzed, highlighting the key factors influencing microphone performance. Furthermore, we delve into the application areas of these microphones, ranging from aircraft design and satellite launching to biomedical fields and audio engineering. Lastly, we discuss the materials used for MEMS microphones, focusing on substrate materials, etchant materials, and the specific requirements for piezoresistive and capacitive materials based microphones. Further, this review paper explores the emerging trends of graphene-based microphones, MEMS/NEMS hybrid devices, and the integration of artificial intelligence and signal processing techniques, as well as the potential applications in biomedical and healthcare fields, providing a comprehensive overview of the materials and methods employed in MEMS-based capacitive and piezoresistive microphones.

Item Type:	Article
Date Type:	Publication
Status:	Published
Schools:	Engineering
Publisher:	Elsevier
ISSN:	1369-8001
Date of Acceptance:	1 October 2023
Last Modified:	06 Jan 2024 02:07
URI:	https://orca.cardiff.ac.uk/id/eprint/163651

Actions (repository staff only)

Edit Item