公开(公告)号：US11581825B2

公开(公告)日：2023-02-14

申请号：US16871410

申请日：2020-05-11

申请人： TDK Corporation

发明人： Akira Satoh ,  Yoshikazu Shimura ,  Kaoru Kijima

IPC分类号： H02N2/00 ,  B06B1/06

摘要： An acoustic device includes a piezoelectric element, an attachment member to which the piezoelectric element is attached, and a spacer. The piezoelectric element includes first and second principal surfaces opposing each other. The attachment opposes the first principal surface. The spacer is disposed between the piezoelectric element and the attachment member in such a manner as to form an acoustic space between the piezoelectric element and the attachment member. The spacer includes an adhesive layer including a principal surface in contact with the first principal surface and a principal surface in contact with the attachment member.

公开(公告)号：US09697935B2

公开(公告)日：2017-07-04

申请号：US14774824

申请日：2014-02-17

申请人： TDK CORPORATION

发明人： Kazuhiko Itoh ,  Yoshikazu Shimura

IPC分类号： H01C7/10 ,  H01C7/02 ,  C04B35/468 ,  H01C1/14 ,  H01C7/00

CPC分类号： H01C7/025 ,  C04B35/4682 ,  C04B2235/3201 ,  C04B2235/3208 ,  C04B2235/3224 ,  C04B2235/3225 ,  C04B2235/3227 ,  C04B2235/3229 ,  C04B2235/3239 ,  C04B2235/3251 ,  C04B2235/3262 ,  C04B2235/3298 ,  C04B2235/3418 ,  H01C1/1406 ,  H01C7/008 ,  H01C7/02

摘要： A barium titanate based PTC thermistor ceramic composition without using Pb. Its Curie temperature is shifted to a temperature higher than 120° C. The PTC thermistor can readily turn semiconductive even if it is sintered in air. The resistivity at 25° C. is low and the variation rate of the resistivity at 25° C. with time is little. The PTC thermistor ceramic composition includes a sintered body having a barium titanate based compound represented by formula (1) as the main component, (Ba1-x-y-wBixAyREw)α(Ti1-zTMz)O3 (1), wherein, 1.02y≦x≦1.5y (2), 0.007≦y≦0.125 (3), 0≦(w+z)≦0.01 (4), 0.97≦α≦1.06 (5), and the sintered body contains Ca in a ratio of 0.01 mol or more and less than 0.05 mol relative to 1 mol of Ti site in terms of element.

公开(公告)号：US12120483B2

公开(公告)日：2024-10-15

申请号：US17424257

申请日：2020-01-20

申请人： TDK CORPORATION

发明人： Yoshiki Ohta ,  Takuto Horii ,  Yoshikazu Shimura ,  Atsushi Ezawa ,  Miho Bamba ,  Kaoru Kijima ,  Akihiro Takeda

IPC分类号： H01L41/047 ,  H04R1/24 ,  H04R7/04 ,  H04R17/00 ,  H10N30/20 ,  H10N30/50 ,  H10N30/87

CPC分类号： H04R1/24 ,  H04R7/04 ,  H04R17/00 ,  H10N30/2047 ,  H10N30/50 ,  H10N30/874 ,  H10N30/875

摘要： An audio device includes a vibration member, and a first piezoelectric vibrator and a second piezoelectric vibrator that are provided on the vibration member. A natural frequency of the first piezoelectric vibrator is larger than a natural frequency of the second piezoelectric vibrator.

公开(公告)号：US09362031B2

公开(公告)日：2016-06-07

申请号：US14502123

申请日：2014-09-30

申请人： TDK CORPORATION

发明人： Yoshikazu Shimura ,  Kazuhiko Itoh

IPC分类号： H01C7/02 ,  H01C7/00 ,  H01C1/14

CPC分类号： H01C7/025 ,  C04B35/4682 ,  C04B35/6264 ,  C04B35/62675 ,  C04B35/62695 ,  C04B35/63416 ,  C04B2235/3201 ,  C04B2235/3208 ,  H01C1/1406 ,  H01C7/008 ,  H01C7/027

摘要： A semiconductor ceramic composition which includes a compound represented by the following formula (1) as a main component, (Ba1-x-y-wBixAyREw)m(Ti1-zTMz)O3 (1) (wherein, A is at least one element selected from Na or K, RE is at least one element selected from the group consisting of Y, La, Ce, Pr, Nd, Sm, Gd, Dy and Er, TM is at least one element selected from the group consisting of V, Nb and Ta, w, x, y, z and m satisfy the following relationships of (2)˜(5), 0.007≦x≦0.125 (2), x

摘要翻译： 包含下述式（1）表示的化合物作为主要成分的（Ba1-xy-wBixAyREw）m（Ti1-zTMz）O3（1）的半导体陶瓷组合物（其中，A为选自Na 或K，RE为选自Y，La，Ce，Pr，Nd，Sm，Gd，Dy和Er中的至少一种元素，TM为选自V，Nb和Ta中的至少一种元素 （2）〜（5），0.007＆nlE; x＆nlE; 0.125（2），x

公开(公告)号：US10003009B2

公开(公告)日：2018-06-19

申请号：US14633649

申请日：2015-02-27

申请人： TDK CORPORATION

发明人： Masahito Furukawa ,  Yoshikazu Shimura ,  Taku Masai ,  Satoshi Wada

IPC分类号： H01L41/187 ,  H01L41/083

CPC分类号： H01L41/1873 ,  H01L41/083 ,  H01L41/1871

摘要： A composite piezoelectric ceramic includes a compact of crystal particles including at least one of potassium niobate (KNbO3) and sodium niobate (NaNbO3) and optionally further including lithium niobate (LiNbO3), and a layer containing barium titanate (BaTiO3) that is disposed on the surface of the compact while forming a heterojunction with the compact. A piezoelectric device includes the composite piezoelectric ceramic.

公开(公告)号：US09472326B2

公开(公告)日：2016-10-18

申请号：US14751812

申请日：2015-06-26

申请人： TDK CORPORATION

发明人： Yoshikazu Shimura ,  Kazuhiko Itoh ,  Kazutaka Fujita

IPC分类号： H01C7/02 ,  H01C7/00 ,  H01C1/14 ,  C04B35/462 ,  C04B35/468

CPC分类号： H01C7/025 ,  C04B35/462 ,  C04B35/4682 ,  C04B2235/3201 ,  C04B2235/3213 ,  C04B2235/3217 ,  C04B2235/3224 ,  C04B2235/3225 ,  C04B2235/3227 ,  C04B2235/3229 ,  C04B2235/3239 ,  C04B2235/3251 ,  C04B2235/3262 ,  C04B2235/3272 ,  C04B2235/3281 ,  C04B2235/3284 ,  C04B2235/3298 ,  C04B2235/3418 ,  C04B2235/79 ,  H01C1/14 ,  H01C7/008 ,  H01C7/02

摘要： A semiconductor ceramic composition with small resistivity at room temperature and large temperature coefficient of resistance is provided; the composition is represented by formula, (Ba1-x-y-wBixAyREw)m(Ti1-zTMz)O3  (1), (wherein, A is at least one element from Na or K, RE is at least one element from the group consisting of Y, La, Ce, Pr, Nd, Sm, Gd, Dy and Er, TM is at least one element from the group consisting of V, Nb and Ta, and w, x, y, z (each in mol) and the mole ratio m of Ba site to Ti site satisfy the following in equations, 0.007≦x≦0.125  (2) x

公开(公告)号：USD933616S1

公开(公告)日：2021-10-19

申请号：US29646334

申请日：2018-05-03

申请人： TDK CORPORATION

设计人： Yoshiki Ohta ,  Yoshikazu Shimura ,  Ryuhei Sasaki ,  Kazushi Tachimoto ,  Hideya Sakamoto ,  Tetsuyuki Taniguchi ,  Akihiro Takeda

公开(公告)号：US10018649B2

公开(公告)日：2018-07-10

申请号：US15257511

申请日：2016-09-06

申请人： TDK CORPORATION

发明人： Kazushi Tachimoto ,  Yoshikazu Shimura ,  Akira Suzuki

IPC分类号： G01P15/09

CPC分类号： G01P15/09

摘要： An acceleration sensor capable of improving sensitivity is provided. In the acceleration sensor, although a solder fillet is formed in a lower end of a terminal electrode exposed from a covering portion, the covering portion suppresses the rise of the solder fillet. Due to this, the operation of the acceleration sensor is not easily limited by the solder fillet, and the acceleration sensor can generate electric charge which corresponds to a load more accurately. Therefore, the sensitivity of the acceleration sensor can be improved.

公开(公告)号：US10014097B2

公开(公告)日：2018-07-03

申请号：US15222050

申请日：2016-07-28

申请人： TDK CORPORATION

发明人： Kazutaka Fujita ,  Kazuhiko Itoh ,  Yoshikazu Shimura

IPC分类号： H01C7/02 ,  C04B35/468 ,  C04B35/626 ,  C04B35/64 ,  H01C1/14

CPC分类号： H01C7/027 ,  C04B35/4682 ,  C04B35/6261 ,  C04B35/62625 ,  C04B35/6263 ,  C04B35/62645 ,  C04B35/64 ,  C04B2235/3201 ,  C04B2235/3208 ,  C04B2235/3225 ,  C04B2235/3227 ,  C04B2235/3229 ,  C04B2235/3234 ,  C04B2235/3239 ,  C04B2235/3251 ,  C04B2235/3253 ,  C04B2235/3255 ,  C04B2235/3262 ,  C04B2235/3298 ,  C04B2235/3418 ,  C04B2235/602 ,  C04B2235/606 ,  C04B2235/6562 ,  C04B2235/6565 ,  C04B2235/658 ,  C04B2235/79 ,  C04B2235/9607 ,  H01C1/1406 ,  H01C7/02 ,  H01C7/025

摘要： A semiconductor ceramic composition including a compound represented by the following general formula (1) as a main component. (BavBixAyREw)m(TiuTMz)O3  (1) (wherein, A represents both elements of Na and K; RE is at least one element selected from the group consisting of Y, La, Ce, Pr, Nd, Sm, Gd, Dy and Er; and TM is at least one element selected from the group consisting of V, Nb and Ta.) 0.01≤x≤0.15  (2) x≤y≤0.3  (3) 0≤(w+z)≤0.01  (4) v+x+y+w=1  (5) u+z=1  (6) 0.950≤m≤1.050  (7) further, 0.001 mol to 0.055 mol of Ca is included and the ratio of Na/(Na+K) is 0.1 or more and less than 1.

公开(公告)号：US11944999B2

公开(公告)日：2024-04-02

申请号：US16977122

申请日：2019-02-21

申请人： TDK CORPORATION

发明人： Yoshiki Ohta ,  Hideya Sakamoto ,  Kazushi Tachimoto ,  Yoshikazu Shimura ,  Tetsuyuki Taniguchi ,  Akihiro Takeda

IPC分类号： H01L41/047 ,  B06B1/06 ,  H10N30/20 ,  H10N30/50 ,  H10N30/87 ,  H10N30/853

CPC分类号： B06B1/0603 ,  H10N30/2047 ,  H10N30/50 ,  H10N30/871 ,  H10N30/8536 ,  H10N30/8548 ,  H10N30/8554

摘要： A vibration device includes a bimorph type piezoelectric element having a first main surface and a second main surface facing each other and a vibration member bonded to the second main surface of the piezoelectric element. The piezoelectric element has a first active region disposed closer to the first main surface between the first and second main surfaces and a second active region disposed closer to the second main surface than the first active region between the first and second main surfaces. When a force generated in the first active region is F1, a force generated in the second active region is F2, and a force by which the vibration member restrains the second active region is Fr, F2−F1≥Fr is satisfied.