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Ultrasonic transducer and electronic device

A technology of ultrasonic transducer and electronic device, which is applied in the directions of sound-producing instruments, piezoelectric/electrostrictive/magnetostrictive devices, instruments, etc. Excellent, good working performance, to solve the effect of poor ultrasonic emission capability

Pending Publication Date: 2019-04-16
SHENZHEN GOODIX TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The application provides an ultrasonic transducer device and an electronic device, which realizes the purpose of the ultrasonic transducer device having a strong ultrasonic emission capability, and solves the problem that the performance of the ultrasonic transducer device is reduced due to the poor ultrasonic emission capability of the existing CMUT. question

Method used

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  • Ultrasonic transducer and electronic device
  • Ultrasonic transducer and electronic device
  • Ultrasonic transducer and electronic device

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0056] figure 1 It is a schematic diagram of the cross-sectional structure of the ultrasonic transducer device provided in Embodiment 1 of the present application, figure 2 It is a schematic diagram of the cross-sectional structure of each layer in the ultrasonic transducer device provided in Embodiment 1 of the present application, image 3 It is a schematic diagram of the arrangement of the vibration elements in the ultrasonic receiving layer in the ultrasonic transducer device provided in Embodiment 1 of the present application.

[0057] The ultrasonic transducer device provided in this embodiment can be applied in the field of fingerprint identification, and is used to realize functions such as authorized power-on, access, and credit payment for the current user.

[0058] refer to Figure 1-3 As shown, the ultrasonic transducer device includes: a sensing medium layer 40, an ultrasonic receiving layer 20 capable of receiving ultrasonic waves, and an ultrasonic emitting l...

Embodiment 2

[0078] Figure 4 It is a schematic structural diagram of the cross-sectional structure of each layer in the ultrasonic transducer device provided in Embodiment 2 of the present application.

[0079] The difference between this embodiment and the foregoing embodiments is that in this embodiment, the ultrasonic emitting layer 10 is located between the sensing medium layer 40 and the ultrasonic receiving layer 20, and the ultrasonic receiving layer 20 is located between the backing 50 and the ultrasonic emitting layer 10, The transition layer 30 is located between the sensing medium layer 40 and the ultrasonic emission layer 10 .

[0080] Among them, the working distance of the ultrasonic transducer device provided in this embodiment is specifically as follows: firstly, an alternating electric field is applied between the first electrode layer 11 and the second electrode layer 12 to generate a constant pulsed sound wave 101, when the sound wave reaches the valley of the fingerpri...

Embodiment 3

[0083] Figure 5 It is a schematic structural diagram of the electronic device provided in Embodiment 3 of the present application.

[0084] This embodiment provides an electronic device 100, the electronic device 100 includes the ultrasonic transducer device in any of the above embodiments, wherein the electronic device 100 can be any device that requires feature recognition requirements, such as tablet computers, notebooks, mobile phones or an access control system, etc., wherein, in this embodiment, the electronic device 100 has an ultrasonic scanning area 120 corresponding to the ultrasonic transducer device, and when installed, the sensing medium layer 40 of the ultrasonic transducer device is located in the ultrasonic scanning area 120 or directly It is exposed at the ultrasonic scanning area 120 , and during use, the user's finger can be placed in the ultrasonic scanning area 120 to be recognized by the ultrasonic transducer device.

[0085] Wherein, the electronic dev...

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Abstract

The invention provides an ultrasonic transducer and an electronic device. The ultrasonic transducer device includes: a sensing medium layer, an ultrasonic receiving layer which can receive ultrasonicwaves, and an ultrasonic transmitting layer which can transmit ultrasonic waves; wherein the ultrasonic transmitting layer and the ultrasonic receiving layer are arranged below the sensing medium layer in a laminated manner. According to the ultrasonic transducer device provided by the invention, purposes that the ultrasonic transducer has stronger ultrasonic transmitting capability and better receiving effect are achieved, and a problem that performance of the ultrasonic transducer is influenced due to poor ultrasonic generating capability of an existing ultrasonic transducer is solved.

Description

technical field [0001] The present application relates to the technical field of ultrasonic imaging, in particular to an ultrasonic transducer and an electronic device. Background technique [0002] With the development of biometric technology, more and more terminals are equipped with biometric chips. The capacitive micromachined urtrosonic transducer (CMUT) is a relatively common biometric sensor, which actively transmits high-frequency sound waves through the screen to reach the surface of the organism, and then collects the echoes of the ultrasonic waves in the pressed area to form a biometric sensor. Skin feature image, and finally compare the skin feature image with the stored image to complete functions such as fingerprint recognition and liveness detection. [0003] At present, a CMUT usually includes a substrate, a lower electrode, an etched sacrificial layer, a support layer, a diaphragm layer, and an upper electrode arranged in sequence, and then the independent ...

Claims

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Application Information

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IPC IPC(8): G06K9/00G06K9/20G10K9/122G10K11/28H01L41/083
CPCG10K9/122G10K11/28G06V40/1306G06V40/45G06V10/147H10N30/50
Inventor 王红超沈健李运宁
Owner SHENZHEN GOODIX TECH CO LTD
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