Micro-capacitive ultrasonic transducer linear array device for identification

Abstract

The present invention discloses a micro-capacitive ultrasonic transducer linear array device for identification. The device comprises a housing (7), the housing (7) is internally provided with an array chip PCB lead plate (4), the upper surface of the array chip PCB lead plate (4) is electrically connected with a CMUT (Capacitive Micromachined Ultrasonic Transducer) array chip (3), an acoustic transmission tempered glass (1) is sealingly installed at the front of the CMUT array chip (3) on the housing (7), and the position between the CMUT array chip (3) and the acoustic transmission tempered glass (1) is filled with silicone oil acoustic transmission medium (2). The micro-capacitive ultrasonic transducer linear array device for identification is simple in structure, miniaturized, low in cost and easy for array processing and is suitable for batch production. The micro-capacitive ultrasonic transducer linear array device for identification can realize intelligent terminal housing nonporous design to improve the waterproof and dustproof performances of the intelligent terminal, effectively improve the identification precision, efficiency and safety reliability of wet hand and underwater fingerprint identification.

Description

technical field [0001] The invention relates to a microcapacitance ultrasonic transducer array in the field of MEMS (Micro-Electro-Mechanical System) sensors, in particular to a microcapacitance ultrasonic transducer line array device for fingerprint recognition of waterproof intelligent terminals, which can be realized in wet Three-dimensional imaging and recognition of fingerprints and their underlying epidermal structures in the hand state and in underwater environments. Background technique [0002] With the advent of the Internet communication and information age, more and more high-tech smart products (mobile phones, tablet computers, notebooks, etc.) Private information and management of electronic property have become a common phenomenon. At the same time, there are increasingly prominent security risks in identity verification and identification, just as the traditional "account + password" and magnetic card identity verification and identification methods have prob...

AI Technical Summary

Problems solved by technology

Although ultrasonic fingerprint acquisition technology has many advantages in the application of intelligent terminal fingerprint identification, after years of research, it still cannot replace the existing contact fingerprint identification technology and is widely used. The main reason is that the ultrasonic fingerprint sensor miniaturization processing technology content is high. , Manufacturing multiple high-consistency and miniaturized array elements has the problems of high process difficulty and high cost, and it is difficult to meet the needs of smart terminals for the simultaneous development of high-precision, miniaturized, and low-power fingerprint acquisition technology.

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