公开(公告)号：CA2932887C

公开(公告)日：2022-07-12

申请号：CA2932887

申请日：2015-01-08

Applicant: QUALCOMM INC

Inventor： KUO NAI-KUEI ,  DJORDJEV KOSTADIN DIMITROV ,  RANGANATHAN RANJITH ,  CHUEI NAO SUGAWARA

IPC: G01S15/89 ,  G06V40/13

Abstract: Techniques describe structures and methods for generating larger output signals and improving image quality of ultrasonic sensors by inclusion of an acoustic cavity in the sensor stack. In some embodiments, an ultrasonic sensor unit may be tuned during manufacturing or during a provisioning phase to work with different thicknesses and materials. In some embodiments, a standing wave signal may be generated using an acoustic cavity in the ultrasonic sensor unit for capturing an ultrasonic image of an object placed on a sensor surface. In some implementations, the ultrasonic sensor may include an ultrasonic transmitter, a piezoelectric receiver, a thin film transistor (TFT) layer and a TFT substrate positioned between the transmitter and the receiver, one or more adhesive layers, and optional cover materials and coatings. The thickness, density and speed of sound of the sensor materials and associated adhesive attachment layers may be used to attain the desired acoustic cavity and improved performance.

公开(公告)号：CA2937756A1

公开(公告)日：2015-08-27

申请号：CA2937756

申请日：2015-02-22

Applicant: QUALCOMM INC

Inventor： GANTI SURYAPRAKASH ,  CHILUKURU SRIKANTH ,  SONG LIVINGSTONE ,  DJORDJEV KOSTADIN DIMITROV ,  KITCHENS JACK CONWAY ,  SCHNEIDER JOHN ,  BUCHAN NICHOLAS IAN ,  FENNELL LEONARD EUGENE ,  PANCHAWAGH HRISHIKESH VIJAYKUMAR ,  HINGER ASHISH ,  KUO NAI-KUEI ,  NARAYANAN KOLLENGODE ,  GUPTA SAMIR KUMAR ,  DICKINSON TIMOTHY ,  HAMEL MAX ,  BURNS DAVID WILLIAM ,  SEZAN MUHAMMED IBRAHIM ,  DANTSKER EUGENE

IPC: G06K9/00

Abstract: Embodiments of an ultrasonic button and methods for using the ultrasonic button are disclosed. In one embodiment, an ultrasonic button may include an ultrasonic transmitter configured to transmit an ultrasonic wave, a piezoelectric receiver layer configured to receive a reflected wave of the ultrasonic wave, a platen layer configured to protect the ultrasonic transmitter and the piezoelectric receiver layer, a first matching layer configured to match an acoustic impedance of the platen layer with an acoustic impedance of ridges of a finger, and an ultrasonic sensor array configured to detect the finger using the reflected wave.

公开(公告)号：CA2961645C

公开(公告)日：2021-10-26

申请号：CA2961645

申请日：2015-10-15

Applicant: QUALCOMM INC

Inventor： PANCHAWAGH HRISHIKESH VIJAYKUMAR ,  TANG HAO-YEN ,  LU YIPENG ,  DJORDJEV KOSTADIN DIMITROV ,  GANTI SURYAPRAKASH ,  BURNS DAVID WILLIAM ,  SHENOY RAVINDRA VAMAN ,  LASITER JON BRADLEY ,  KUO NAI-KUEI ,  SAMMOURA FIRAS

IPC: H01L41/08 ,  B06B1/06 ,  B81B3/00 ,  G06F3/041 ,  G10K11/34

Abstract: A piezoelectric micromechanical ultrasonic transducer (PMUT) includes a diaphragm disposed over a cavity, the diaphragm including a piezoelectric layer stack including a piezoelectric layer, a first electrode electrically coupled with transceiver circuitry, and a second electrode electrically coupled with the transceiver circuitry. The first electrode may be disposed in a first portion of the diaphragm, and the second electrode may be disposed in a second, separate, portion of the diaphragm. Each of the first and the second electrode is disposed on or proximate to a first surface of the piezoelectric layer, the first surface being opposite from the cavity. The PMUT is configured to transmit first ultrasonic signals by way of the first electrode during a first time period and to receive second ultrasonic signals by way of the second electrode during a second time period, the first time period and the second time period being at least partially overlapping.

公开(公告)号：CA2961645A1

公开(公告)日：2016-04-21

申请号：CA2961645

申请日：2015-10-15

Applicant: QUALCOMM INC

Inventor： PANCHAWAGH HRISHIKESH VIJAYKUMAR ,  TANG HAO-YEN ,  LU YIPENG ,  DJORDJEV KOSTADIN DIMITROV ,  GANTI SURYAPRAKASH ,  BURNS DAVID WILLIAM ,  SHENOY RAVINDRA VAMAN ,  LASITER JON BRADLEY ,  KUO NAI-KUEI ,  SAMMOURA FIRAS

IPC: H01L41/08 ,  B06B1/06 ,  B81B3/00 ,  G06F3/041 ,  G06K9/00 ,  G10K11/34

Abstract: A piezoelectric micromechanical ultrasonic transducer (PMUT) includes a diaphragm disposed over a cavity, the diaphragm including a piezoelectric layer stack including a piezoelectric layer, a first electrode electrically coupled with transceiver circuitry, and a second electrode electrically coupled with the transceiver circuitry. The first electrode may be disposed in a first portion of the diaphragm, and the second electrode may be disposed in a second, separate, portion of the diaphragm. Each of the first and the second electrode is disposed on or proximate to a first surface of the piezoelectric layer, the first surface being opposite from the cavity. The PMUT is configured to transmit first ultrasonic signals by way of the first electrode during a first time period and to receive second ultrasonic signals by way of the second electrode during a second time period, the first time period and the second time period being at least partially overlapping.

公开(公告)号：CA2950919A1

公开(公告)日：2016-01-14

申请号：CA2950919

申请日：2015-06-08

Applicant: QUALCOMM INC

Inventor： LASITER JON BRADLEY ,  SHENOY RAVINDRA VAMAN ,  GOUSEV EVGENI PETROVICH ,  PANCHAWAGH HRISHIKESH ,  BURNS DAVID WILLIAM ,  KUO NAI-KUEI ,  GRIFFITHS JONATHAN CHARLES ,  GANTI SURYAPRAKASH

IPC: B06B1/06 ,  B81B3/00 ,  G06F3/043 ,  H01L41/09

Abstract: A piezoelectric micromechanical ultrasonic transducer (PMUT) includes a multilayer stack disposed on a substrate. The multilayer stack may include an anchor structure disposed over the substrate, a piezoelectric layer stack disposed over the anchor structure, and a mechanical layer disposed proximate to the piezoelectric layer stack. The piezoelectric layer stack may be disposed over a cavity. The mechanical layer may seal the cavity and, together with the piezoelectric layer stack, is supported by the anchor structure and forms a membrane over the cavity, the membrane being configured to undergo one or both of flexural motion and vibration when the PMUT receives or transmits ultrasonic signals.

公开(公告)号：HUE049182T2

公开(公告)日：2020-09-28

申请号：HUE15708999

申请日：2015-02-22

Applicant: QUALCOMM INC

Inventor： GANTI SURYAPRAKASH ,  CHILUKURU SRIKANTH ,  SONG LIVINGSTONE ,  DJORDJEV KOSTADIN DIMITROV ,  KITCHENS JACK CONWAY ,  SCHNEIDER JOHN ,  BUCHAN NICHOLAS IAN ,  FENNELL LEONARD EUGENE ,  PANCHAWAGH HRISHIKESH VIJAYKUMAR ,  HINGER ASHISH ,  KUO NAI-KUEI ,  NARAYANAN KOLLENGODE ,  GUPTA SAMIR KUMAR ,  DICKINSON TIMOTHY ,  HAMEL MAX ,  BURNS DAVID WILLIAM ,  SEZAN MUHAMMED IBRAHIM ,  DANTSKER EUGENE

IPC: G06K9/00

公开(公告)号：CA2937756C

公开(公告)日：2019-11-26

申请号：CA2937756

申请日：2015-02-22

Applicant: QUALCOMM INC

Inventor： GANTI SURYAPRAKASH ,  CHILUKURU SRIKANTH ,  SONG LIVINGSTONE ,  DJORDJEV KOSTADIN DIMITROV ,  KITCHENS JACK CONWAY ,  SCHNEIDER JOHN ,  BUCHAN NICHOLAS IAN ,  FENNELL LEONARD EUGENE ,  PANCHAWAGH HRISHIKESH VIJAYKUMAR ,  HINGER ASHISH ,  KUO NAI-KUEI ,  NARAYANAN KOLLENGODE ,  GUPTA SAMIR KUMAR ,  DICKINSON TIMOTHY ,  HAMEL MAX ,  BURNS DAVID WILLIAM ,  SEZAN MUHAMMED IBRAHIM ,  DANTSKER EUGENE

IPC: G06K9/00

Abstract: Embodiments of an ultrasonic button and methods for using the ultrasonic button are disclosed. In one embodiment, an ultrasonic button may include an ultrasonic transmitter configured to transmit an ultrasonic wave, a piezoelectric receiver layer configured to receive a reflected wave of the ultrasonic wave, a platen layer configured to protect the ultrasonic transmitter and the piezoelectric receiver layer, a first matching layer configured to match an acoustic impedance of the platen layer with an acoustic impedance of ridges of a finger, and an ultrasonic sensor array configured to detect the finger using the reflected wave.

公开(公告)号：CA2932887A1

公开(公告)日：2015-07-16

申请号：CA2932887

申请日：2015-01-08

Applicant: QUALCOMM INC

Inventor： KUO NAI-KUEI ,  DJORDJEV KOSTADIN DIMITROV ,  RANGANATHAN RANJITH ,  CHUEI NAO SUGAWARA

IPC: G06K9/00

Abstract: Techniques describe structures and methods for generating larger output signals and improving image quality of ultrasonic sensors by inclusion of an acoustic cavity in the sensor stack. In some embodiments, an ultrasonic sensor unit may be tuned during manufacturing or during a provisioning phase to work with different thicknesses and materials. In some embodiments, a standing wave signal may be generated using an acoustic cavity in the ultrasonic sensor unit for capturing an ultrasonic image of an object placed on a sensor surface. In some implementations, the ultrasonic sensor may include an ultrasonic transmitter, a piezoelectric receiver, a thin film transistor (TFT) layer and a TFT substrate positioned between the transmitter and the receiver, one or more adhesive layers, and optional cover materials and coatings. The thickness, density and speed of sound of the sensor materials and associated adhesive attachment layers may be used to attain the desired acoustic cavity and improved performance.

公开(公告)号：WO2015127335A3

公开(公告)日：2015-12-10

申请号：PCT/US2015016998

申请日：2015-02-22

Applicant: QUALCOMM INC

Inventor： GANTI SURYAPRAKASH ,  CHILUKURU SRIKANTH ,  SONG LIVINGSTONE ,  DJORDJEV KOSTADIN DIMITROV ,  KITCHENS JACK CONWAY ,  SCHNEIDER JOHN ,  BUCHAN NICHOLAS IAN ,  FENNELL LEONARD EUGENE ,  PANCHAWAGH HRISHIKESH VIJAYKUMAR ,  HINGER ASHISH ,  KUO NAI-KUEI ,  NARAYANAN KOLLENGODE ,  GUPTA SAMIR KUMAR ,  DICKINSON TIMOTHY ,  HAMEL MAX ,  BURNS DAVID WILLIAM ,  SEZAN MUHAMMED IBRAHIM ,  DANTSKER EUGENE

IPC: G06K9/00

CPC classification number: G01N29/09 ,  G01N2291/018 ,  G06K9/0002

Abstract: Embodiments of an ultrasonic button and methods for using the ultrasonic button are disclosed. In one embodiment, an ultrasonic button may include an ultrasonic transmitter configured to transmit an ultrasonic wave, a piezoelectric receiver layer configured to receive a reflected wave of the ultrasonic wave, a platen layer configured to protect the ultrasonic transmitter and the piezoelectric receiver layer, a first matching layer configured to match an acoustic impedance of the platen layer with an acoustic impedance of ridges of a finger, and an ultrasonic sensor array configured to detect the finger using the reflected wave.

Abstract translation: 公开了超声波按钮的实施例和使用超声波按钮的方法。 在一个实施例中，超声波按钮可以包括被配置为传送超声波的超声波发射器，被配置为接收超声波的反射波的压电接收器层，被配置为保护超声波发射器和压电接收器层的压板层， 第一匹配层，其被配置为将压板层的声阻抗与手指的脊的声阻抗匹配;以及超声波传感器阵列，被配置为使用反射波来检测手指。