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http://dx.doi.org/10.46670/JSST.2022.31.5.286

Piezoelectric Ultrasound MEMS Transducers for Fingerprint Recognition  

Jung, Soo Young (Electronic Materials Research Center, Korea Institute of Science and Technology)
Park, Jin Soo (Bionics Research Center, Korea Institute of Science and Technology)
Kim, Min-Seok (Electronic Materials Research Center, Korea Institute of Science and Technology)
Jang, Ho Won (Department of Materials Science and Engineering, Research Institute of Advanced Materials, Seoul National University)
Lee, Byung Chul (Bionics Research Center, Korea Institute of Science and Technology)
Baek, Seung-Hyub (Electronic Materials Research Center, Korea Institute of Science and Technology)
Publication Information
Journal of Sensor Science and Technology / v.31, no.5, 2022 , pp. 286-292 More about this Journal
Abstract
As mobile electronics become smarter, higher-level security systems are necessary to protect private information and property from hackers. For this, biometric authentication systems have been widely studied, where the recognition of unique biological traits of an individual, such as the face, iris, fingerprint, and voice, is required to operate the device. Among them, ultrasound fingerprint imaging technology using piezoelectric materials is one of the most promising approaches adopted by Samsung Galaxy smartphones. In this review, we summarize the recent progress on piezoelectric ultrasound micro-electro-mechanical systems (MEMS) transducers with various piezoelectric materials and provide insights to achieve the highest-level biometric authentication system for mobile electronics.
Keywords
Piezoelectric; MEMS; Ultrasound transducer; Fingerprint; Security;
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