公开(公告)号：US11227721B2

公开(公告)日：2022-01-18

申请号：US15821998

申请日：2017-11-24

Applicant: TDK CORPORATION

Inventor： Yoji Tozawa ,  Masashi Shimoyasu ,  Makoto Yoshino ,  Takuo Abe ,  Akihiko Oide ,  Tsutomu Ono ,  Shinichi Sato ,  Makoto Morita ,  Shinichi Sato ,  Hidekazu Sato ,  Masashi Kitazaki ,  Naoki Uchida ,  Masahiro Kato

IPC: H01F27/29 ,  H01G4/232 ,  H01G4/252 ,  H01G13/00 ,  H05K1/03 ,  H01B1/22 ,  H01G4/30 ,  H03H7/42 ,  H01F17/00 ,  H01F27/32 ,  H01G4/12 ,  H03H1/00 ,  H05K3/34

Abstract: An electronic component includes an element body, an external electrode, and a resin film having electrical insulation properties. The element body includes a principal surface and a side surface adjacent to the principal surface. The external electrode includes a first electrode portion disposed on the principal surface and a second electrode portion disposed on the side surface. The resin film is disposed on the principal surface and is in contact with the principal surface. Each of the first electrode portion and the second electrode portion includes a conductive resin layer disposed on the element body. A conductive resin layer included in the first electrode portion is disposed on the resin film and is in contact with the resin film.

公开(公告)号：US10964878B2

公开(公告)日：2021-03-30

申请号：US15914203

申请日：2018-03-07

Applicant: TDK CORPORATION

Inventor： Masashi Kitazaki ,  Keisuke Teranishi ,  Makoto Ishizaki

IPC: H01L41/08 ,  H01L41/43 ,  H01L41/047 ,  H01L41/187 ,  H01L41/37 ,  C04B35/628 ,  C04B35/26 ,  C04B35/468 ,  C01G49/00 ,  C01G23/00

Abstract: A piezoelectric composition comprises a plurality of crystal particles, wherein the piezoelectric composition includes bismuth, iron, barium, titanium, and oxygen; the crystal particle include a core and a shell having a contents of bismuth higher than that in the core and covering the core; and the total area of the cross sections of the cores exposed to the cross section of the piezoelectric composition is expressed as SCORE, the total area of the cross sections of the shells exposed to the cross section of the piezoelectric composition is expressed as SSHELL, and 100·SCORE/(SCORE+SSHELL) is 50 to 90.

公开(公告)号：US11545613B2

公开(公告)日：2023-01-03

申请号：US16742016

申请日：2020-01-14

Applicant: TDK Corporation

Inventor： Masashi Kitazaki

IPC: H01L41/18 ,  H01L41/187 ,  H01L41/257

Abstract: A piezoelectric composition comprises an oxide having a perovskite structure, wherein the oxide contains bismuth, barium, iron and titanium; the X-ray diffraction pattern of the piezoelectric composition after a polarization treatment has a first peak and a second peak in the range of the diffraction angle 2θ of 38.6° or more and 39.6° or less; the diffraction angle 2θ of the first peak is smaller than the diffraction angle 2θ of the second peak; an intensity of the first peak is represented as IL; an intensity of the second peak is represented as IH; and IH/IL is 0.00 or more and 2.00 or less.

公开(公告)号：US10937943B2

公开(公告)日：2021-03-02

申请号：US15906292

申请日：2018-02-27

Applicant: TDK CORPORATION

Inventor： Makoto Ishizaki ,  Keisuke Teranishi ,  Masashi Kitazaki ,  Mingyu Chen ,  Kazuki Fukasawa

IPC: H01L41/187 ,  C04B35/453 ,  C04B35/626 ,  C04B35/634 ,  C04B35/638 ,  H01L41/43 ,  C04B35/64 ,  C01G49/00 ,  C04B35/26

Abstract: The piezoelectric composition is represented by the following Chemical Formula (1): x[BimFeO3]-y[BamTiO3]-z[BimAlO3]  (1) wherein 0.5≤x≤0.7995, 0.2≤y≤0.4, 0.0005≤z≤0.1, x+y+z=1, 0.96≤m≤1.04.

公开(公告)号：US10833247B2

公开(公告)日：2020-11-10

申请号：US15906460

申请日：2018-02-27

Applicant: TDK CORPORATION

Inventor： Keisuke Teranishi ,  Masashi Kitazaki ,  Makoto Ishizaki

IPC: H01L41/187 ,  C04B35/453 ,  C04B35/626 ,  C04B35/634 ,  C04B35/638 ,  H01L41/43 ,  C04B35/64 ,  C04B35/26 ,  C01G23/00 ,  C01G49/00

Abstract: The piezoelectric composition is represented by the following Chemical Formula (1): x[BimFeO3]-y[BamTiO3]-z[SrmTiO3]  (1) wherein 0.5≤x≤0.8, 0.02≤y≤0.4, 0.02≤z≤0.2, x+y+z=1, and 0.96≤m≤1.04.

公开(公告)号：US10811591B2

公开(公告)日：2020-10-20

申请号：US15914093

申请日：2018-03-07

Applicant: TDK CORPORATION

Inventor： Masashi Kitazaki ,  Keisuke Teranishi ,  Makoto Ishizaki

IPC: H01L41/187 ,  C04B35/628 ,  C04B35/26 ,  C04B35/468 ,  C04B35/475 ,  C04B35/626 ,  C04B35/64 ,  H01L41/43

Abstract: A piezoelectric composition comprises a plurality of crystal particles, wherein the piezoelectric composition includes bismuth, iron, barium, titanium, and oxygen; the crystal particles include a core and a shell covering the core; the average value of the contents of bismuth in the cores is expressed as CCORE % by mass, the average value of the contents of bismuth in the shells is expressed as CSHELL % by mass, and the CCORE is lower than the CSHELL; and the number of all the particles comprised in the piezoelectric composition is expressed as N, the number of the crystal particles including the core and the shell is expressed as n, and n/N is 0.10 to 1.00.