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    APPARATUS WITH ULTRASONIC FINGERPRINT SENSOR AND ONE OR MORE RESONATORS, AND RELATED SYSTEMS AND METHODS
    43.
    发明公开
    APPARATUS WITH ULTRASONIC FINGERPRINT SENSOR AND ONE OR MORE RESONATORS, AND RELATED SYSTEMS AND METHODS 审中-公开

    公开(公告)号：EP4470681A2

    公开(公告)日：2024-12-04

    申请号：EP24207023.3

    申请日：2022-08-04

    Applicant: QUALCOMM Incorporated

    Inventor： STROHMANN, Jessica Liu ,  PANCHAWAGH, Hrishikesh Vijaykumar ,  KUO, Nai-Kuei ,  LU, Yipeng ,  LOPEZ, Ali ,  DJORDJEV, Kostadin Dimitrov

    IPC: B06B1/06

    Abstract: Some disclosed implementations include an ultrasonic sensor stack and an acoustic resonator. The acoustic resonator may be configured to enhance ultrasonic waves transmitted by the ultrasonic sensor stack in an ultrasonic frequency range that is suitable for ultrasonic fingerprint sensors. In some examples, the acoustic resonator may include one or more low-impedance layers residing between a first higher-impedance layer and a second higher-impedance layer. Each of the one or more low-impedance layers may have a lower acoustic impedance than an acoustic impedance of the first higher-impedance layer or an acoustic impedance of the second higher-impedance layer. At least one low-impedance layer may have a thickness corresponding to a multiple of a half wavelength at a peak frequency of the acoustic resonator. The peak frequency may be within a frequency range from 1 MHz. to 20 MHz.

    SUPERPIXEL ARRAY OF PIEZOELECTRIC ULTRASONIC TRANSDUCERS FOR 2-D BEAMFORMING
    48.
    发明公开
    SUPERPIXEL ARRAY OF PIEZOELECTRIC ULTRASONIC TRANSDUCERS FOR 2-D BEAMFORMING 审中-公开
    用于二维波束形成的压电超声换能器的超级阵列

    公开(公告)号：EP3207498A1

    公开(公告)日：2017-08-23

    申请号：EP15788514.6

    申请日：2015-10-15

    Applicant: Qualcomm Incorporated

    Inventor： LU, Yipeng ,  TANG, Hao-Yen ,  PANCHAWAGH, Hrishikesh Vijaykumar

    IPC: G06K9/00 ,  B06B1/06

    CPC classification number: G01S7/5208 ,  B06B1/0207 ,  B06B1/0607 ,  B06B1/0644 ,  B06B1/0666 ,  B06B2201/20 ,  B06B2201/55 ,  G01S7/521 ,  G01S15/04 ,  G01S15/89 ,  G01S15/8915 ,  G06F3/0412 ,  G06F3/0416 ,  G06F3/0436 ,  G06F2203/04101 ,  G06K9/0002 ,  G06K9/00335 ,  G10K11/26 ,  G10K11/34 ,  G10K11/341 ,  G10K11/346 ,  H01L41/047 ,  H01L41/08

    Abstract: An array of piezoelectric ultrasonic transducer elements includes a plurality of superpixel regions. Each superpixel region includes at least two pixel sets, a first pixel set of the at least two pixel sets being disposed in a central portion of the superpixel region, and at least a second pixel set being disposed in an outer portion of the superpixel region. An electrical coupling may be provided between the array and transceiver electronics. The transceiver electronics may be configured to operate the array in a selectable one of a first mode and a second mode. In the first mode, the array generates a substantially plane ultrasonic wave having a first acoustic pressure. In the second mode, the array generates, from each superpixel region, a focused beam having a second acoustic pressure that is substantially higher than the first acoustic pressure.

    Abstract translation: 压电微机械超声换能器（PMUT）包括设置在空腔上的隔膜，该隔膜包括包含压电层的压电层堆叠，与收发器电路电耦合的第一电极以及与收发器电路电耦合的第二电极。 第一电极可以设置在隔膜的第一部分中，并且第二电极可以设置在隔膜的第二独立部分中。 第一电极和第二电极中的每一个设置在压电层的第一表面上或接近压电层的第一表面，第一表面与腔体相对。 PMUT被配置为在第一时间段期间通过第一电极传输第一超声波信号，并且在第二时间段期间通过第二电极接收第二超声波信号，第一时间段和第二时间段至少为 部分重叠。

    ACTIVE BEAM-FORMING TECHNIQUE FOR PIEZOELECTRIC ULTRASONIC TRANSDUCER ARRAY
    49.
    发明公开
    ACTIVE BEAM-FORMING TECHNIQUE FOR PIEZOELECTRIC ULTRASONIC TRANSDUCER ARRAY 审中-公开
    压电超声换能器阵列的主动束成形技术

    公开(公告)号：EP3207497A1

    公开(公告)日：2017-08-23

    申请号：EP15787119.5

    申请日：2015-10-15

    Applicant: Qualcomm Incorporated

    Inventor： TANG, Hao-Yen ,  LU, Yipeng ,  PANCHAWAGH, Hrishikesh Vijaykumar

    IPC: G06K9/00 ,  G10K11/34 ,  B06B1/06

    CPC classification number: G01S7/5208 ,  B06B1/0207 ,  B06B1/0607 ,  B06B1/0644 ,  B06B1/0666 ,  B06B2201/20 ,  B06B2201/55 ,  G01S7/521 ,  G01S15/04 ,  G01S15/89 ,  G01S15/8915 ,  G06F3/0412 ,  G06F3/0416 ,  G06F3/0436 ,  G06F2203/04101 ,  G06K9/0002 ,  G06K9/00335 ,  G10K11/26 ,  G10K11/34 ,  G10K11/341 ,  G10K11/346 ,  H01L41/047 ,  H01L41/08

    Abstract: An apparatus includes an array of pixels, each pixel including in-cell pixel logic and a piezoelectric micromechanical ultrasonic transducer (PMUT) element, each in-cell pixel logic being communicatively coupled with at least one adjacent pixel in the array. Transceiver electronics may operate the array in a selectable one of a first mode and a second mode. In the first mode, the array may generate a substantially plane ultrasonic wave. In the second mode, the array may generate, from at least one superpixel region, a focused beam of relatively high acoustic pressure, each superpixel region including at least one inner pixel disposed in a central portion of the superpixel region and at least a first group of outer pixels disposed in an outer portion of the superpixel region. The transceiver electronics may be configured to operate the array by configuring at least one in-cell pixel logic.

    Abstract translation: 压电微机械超声换能器（PMUT）包括设置在空腔上的隔膜，该隔膜包括包含压电层的压电层堆叠，与收发器电路电耦合的第一电极以及与收发器电路电耦合的第二电极。 第一电极可以设置在隔膜的第一部分中，并且第二电极可以设置在隔膜的第二独立部分中。 第一电极和第二电极中的每一个设置在压电层的第一表面上或接近压电层的第一表面，第一表面与腔体相对。 PMUT被配置为在第一时间段期间通过第一电极传输第一超声波信号，并且在第二时间段期间通过第二电极接收第二超声波信号，第一时间段和第二时间段至少为 部分重叠。

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