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公开(公告)号：EP4346361A1
公开(公告)日：2024-04-03
申请号：EP23199076.3
申请日：2023-09-22
申请人： FUJIFILM Corporation
IPC分类号： H10N30/00 , H10N30/50 , H10N30/853
摘要： A piezoelectric element includes a substrate; and a first electrode, a first piezoelectric film, a second electrode, a second piezoelectric film, and a third electrode which are provided on the substrate in this order, in which both the first piezoelectric film and the second piezoelectric film contain a perovskite-type oxide containing Pb at an A site and containing Zr, Ti, and M at a B site as a main component, where M is a metal element selected from V, Nb, Ta, Sb, Mo, and W, an M composition ratio in the first piezoelectric film is different from an M composition ratio in the second piezoelectric film, and polarization-electric field hysteresis measured for the first piezoelectric film with the first electrode grounded and the second electrode as a drive electrode, and polarization-electric field hysteresis measured for the second piezoelectric film with the second electrode grounded and the third electrode as a drive electrode are shifted in the same electric field direction with respect to origins thereof.
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公开(公告)号：EP4299009A1
公开(公告)日：2024-01-03
申请号：EP22759762.2
申请日：2022-02-24
申请人： FUJIFILM Corporation
发明人： SASAKI, Tsutomu
IPC分类号： A61B7/04
摘要： An electronic stethoscope includes: a biological sound sensor that detects a biological sound and outputs an analog-format biological sound signal; an analog system that processes the biological sound signal without converting the biological sound signal into a digital signal and outputs the biological sound signal to an outside; and a digital system that converts the biological sound signal into the digital signal and outputs the biological sound signal.
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公开(公告)号：EP4005488A1
公开(公告)日：2022-06-01
申请号：EP20846462.8
申请日：2020-07-20
申请人： FUJIFILM Corporation
发明人： SASAKI, Tsutomu , MIYOSHI, Tetsu
IPC分类号： A61B7/04
摘要： Provided is a stethoscope including: a support base that has an opening portion; a piezoelectric film that is supported by the support base in a state in which a surface exposed from the opening portion is convexly curved, and that detects a vibration caused by a sound which is generated from an object to be measured; and a protective layer that is disposed on a surface of the piezoelectric film on a side which comes into contact with the object to be measured, and that has an acoustic impedance between an acoustic impedance of the object to be measured and an acoustic impedance of the piezoelectric film.
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公开(公告)号：EP4346360A1
公开(公告)日：2024-04-03
申请号：EP23198032.7
申请日：2023-09-18
申请人： FUJIFILM Corporation
IPC分类号： H10N30/00 , H10N30/50 , H10N30/853
摘要： A piezoelectric element includes a substrate; and a first electrode, a first piezoelectric film, a second electrode, a second piezoelectric film, and a third electrode which are provided on the substrate in this order, in which both the first piezoelectric film and the second piezoelectric film contain PZT having a metal element M doped thereto, as a main component, one piezoelectric film of the first piezoelectric film and the second piezoelectric film has a spontaneous polarization aligned in a film thickness direction, and in a case where in a hysteresis curve showing polarization-voltage characteristics of the one piezoelectric film, a coercive voltage on a positive side is denoted by Vcf + and a coercive voltage on a negative side is denoted by Vcf, and in polarization-voltage characteristics of the other piezoelectric film, a coercive voltage on a positive side is denoted by Vcr + and a coercive voltage on a negative side is denoted by Vcr - , |Vcr + + Vcr - | + + Vcf - | - 0.2 is satisfied.
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公开(公告)号：EP4142456A1
公开(公告)日：2023-03-01
申请号：EP22189585.7
申请日：2022-08-09
申请人： FUJIFILM Corporation
IPC分类号： H10N30/87 , H10N30/853
摘要： There are provided a piezoelectric laminate (5) and a piezoelectric element (1), which makes it possible to suppress the deterioration of piezoelectric characteristics and suppress the manufacturing cost as compared with the conventional case.
The piezoelectric laminate (5) and the piezoelectric element (1) have, on a substrate (10) in the following order, a lower electrode layer (12) and a piezoelectric film (15) containing a perovskite-type oxide, in which the lower electrode layer (12) contains a Ta element (12c), contains a Ta nitride (12b) on a side closest to the piezoelectric film in a thickness direction of the lower electrode layer, and includes a region where a content of the Ta element changes in the thickness direction, and the change in the content of the Ta element in the thickness direction is continuous.-
公开(公告)号：EP4346358A1
公开(公告)日：2024-04-03
申请号：EP23192851.6
申请日：2023-08-23
申请人： FUJIFILM Corporation
IPC分类号： H10N30/00 , H10N30/853 , H10N30/50
摘要： A piezoelectric element includes a substrate; and a first electrode, a first piezoelectric film, a second electrode, a second piezoelectric film, and a third electrode which are provided on the substrate in this order, in which both the first piezoelectric film and the second piezoelectric film have spontaneous polarizations aligned in a film thickness direction and directions of the spontaneous polarizations are the same, and in a case where in a hysteresis curve of one piezoelectric film, a coercive voltage on a positive side is denoted by VcF + , a coercive voltage on a negative side is denoted by Vcf, an absolute value |Vcf + - Vcf - | of a difference between both coercive voltages is denoted by ΔVcf, and the larger of an absolute value of the coercive voltage Vcf + and an absolute value of the coercive voltage Vcf is denoted by Vcf, and in a hysteresis curve of the other piezoelectric film, a coercive voltage on a positive side is denoted by Vcr + , a coercive voltage on a negative side is denoted by Vcr - , an absolute value |Vcr + - Vcr - | of a difference between both coercive voltages is denoted by ΔVcr, and the larger of an absolute value of the coercive voltage Vcr + and an absolute value of the coercive voltage Vcr - is denoted by Vcr, ΔVcr
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公开(公告)号：EP4154820A1
公开(公告)日：2023-03-29
申请号：EP21809530.5
申请日：2021-05-12
申请人： FUJIFILM Corporation
发明人： SASAKI, Tsutomu
摘要： Provided is a stethoscope including: a support base having a contact surface that comes into contact with an object to be measured, a rear surface provided on a side opposite to the contact surface, and a side surface that connects the contact surface and the rear surface to each other and has a neck portion having a diameter smaller than a diameter of each of the contact surface and the rear surface; a piezoelectric film that is supported by the support base and detects a vibration caused by a sound generated from the object to be measured; a first sound absorbing material that is provided on an outer surface of the rear surface and absorbs a vibration caused by a sound coming from an outside; and a second sound absorbing material that is provided on an outer surface of the side surface on a side of the contact surface with respect to the neck portion and absorbs the vibration caused by the sound coming from the outside.
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公开(公告)号：EP4142455A1
公开(公告)日：2023-03-01
申请号：EP22189580.8
申请日：2022-08-09
申请人： FUJIFILM Corporation
IPC分类号： H10N30/87 , H10N30/853
摘要： There are provided a piezoelectric laminate (5) and a piezoelectric element (1), which makes it possible to suppress the deterioration of piezoelectric characteristics and suppress the manufacturing cost as compared with the conventional case.
The piezoelectric laminate (5) and the piezoelectric element (1) have, on a substrate (10) in the following order, a lower electrode layer (12) and a piezoelectric film (15) containing a perovskite-type oxide, in which the lower electrode layer includes the metal layer (12c) containing Ni and a surface layer (12b) containing a Ni oxide or a Ni oxynitride, and in the lower electrode layer (12), the surface layer (12b) is arranged on the side closest to the piezoelectric film (15).-
9.发明公开PEROVSKITE OXIDE, PROCESS FOR PRODUCING THE SAME, PIEZOELECTRIC FILM, AND PIEZOELECTRIC DEVICE 审中-公开钙钛矿型氧化物，工艺制作，压电片和压电器件
公开(公告)号：EP2118015A1
公开(公告)日：2009-11-18
申请号：EP08703847.7
申请日：2008-01-18
申请人： Fujifilm Corporation
发明人： SAKASHITA, Yukio , SASAKI, Tsutomu
CPC分类号： B41J2/14233 , C01G29/006 , C01G49/009 , C01G51/006 , C01G55/00 , C01P2002/34 , C01P2002/52 , C01P2002/72 , C01P2004/62 , C01P2006/40 , C04B35/16 , C04B35/18 , C04B35/26 , C04B35/2683 , C04B35/44 , C04B35/457 , C04B35/462 , C04B35/475 , C04B2235/3201 , C04B2235/3215 , C04B2235/3217 , C04B2235/3224 , C04B2235/3227 , C04B2235/3232 , C04B2235/3234 , C04B2235/3236 , C04B2235/3251 , C04B2235/3272 , C04B2235/3275 , C04B2235/3286 , C04B2235/3296 , C04B2235/3298 , C04B2235/3418 , C04B2235/76 , C04B2235/768 , C04B2235/787 , C04B2235/80 , C04B2235/81 , H01L41/0973 , H01L41/1878 , H01L41/316
摘要： A process for producing a perovskite oxide having a composition expressed by the compositional formulas A(B,C,D)O 3 , and determined so as to satisfy the conditions (1), (2), (3), and (4) 0.98 1.0 , and TF ACO 3
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公开(公告)号：EP4005489A1
公开(公告)日：2022-06-01
申请号：EP20847432.0
申请日：2020-07-20
申请人： FUJIFILM Corporation
发明人： SASAKI, Tsutomu
IPC分类号： A61B7/04
摘要： Provided is a stethoscope including: a support base having a first contact surface that comes into contact with an object to be measured, in which each of three first connection sides that are at least parts of sides defining the first contact surface is at least a part of each side of a triangle including the first contact surface; three elastic members having elasticity each of which has a second contact surface that has an obtuse angle formed with the first contact surface and that comes into contact with the object to be measured, the three elastic members being connected to each of the first connection sides in a second connection side having the same length as the first connection side out of sides defining the second contact surface; and three electrocardiographic electrodes that are disposed on each of the second contact surfaces and detect cardiac electrical activity of the object to be measured.
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