公开(公告)号：US20230140545A1

公开(公告)日：2023-05-04

申请号：US17978429

申请日：2022-11-01

Applicant: TDK CORPORATION

Inventor： Mayumi TAKAHASHI ,  Kotaro TERAO ,  Raitaro MASAOKA

IPC: G01N27/60 ,  G01N33/00

Abstract: A gas sensor includes a quartz crystal unit and a sensitive layer formed on the quartz crystal unit and configured to adsorb a gas to be detected, wherein the sensitive layer is porous, and has a particle skeleton made of a plurality of conductive polymer particles and a polyelectrolyte that is at least partially disposed between the adjacent conductive polymer particles.

公开(公告)号：US20210391112A1

公开(公告)日：2021-12-16

申请号：US17242494

申请日：2021-04-28

Applicant: TDK CORPORATION

Inventor： Yasuhide YAMASHITA ,  Kotaro TERAO ,  Shinsuke HASHIMOTO

IPC: H01F27/255 ,  B22F1/02 ,  H01F3/08

Abstract: An electronic component having excellent DC superimposition characteristic and initial magnetic permeability, a core used for the electronic component, and a element body constituting the core are provided. The element body has magnetic large particles and at least one spacer region, wherein one or more small particles having an average particle size smaller than that of the magnetic large particles exist as spacers to form the spacer region between the large particles in a field of view within a predetermined range where 10 or more and 40 or less of the large particles are observable in a cross section of the element body.

公开(公告)号：US20220311007A1

公开(公告)日：2022-09-29

申请号：US17699881

申请日：2022-03-21

Applicant: TDK CORPORATION

Inventor： Hiroki KARISYUKU ,  Takashi MORI ,  Yasuhide YAMASHITA ,  Kotaro TERAO

IPC: H01M4/62 ,  H01M4/131 ,  H01M10/0525

Abstract: A positive electrode for a lithium ion secondary battery includes a current collector and a positive electrode active material layer in contact with at least one surface of the current collector, wherein the positive electrode active material layer contains a plurality of positive electrode active materials and a plurality of fibrous carbons, the positive electrode active material layer has a plurality of pores therein, at least a part of the plurality of fibrous carbons is intertwined with each other to form a carbon network, and the carbon network is formed on a surface facing one of the plurality of pores.

公开(公告)号：US20210335526A1

公开(公告)日：2021-10-28

申请号：US17242924

申请日：2021-04-28

Applicant: TDK CORPORATION

Inventor： Yasuhide YAMASHITA ,  Kotaro TERAO ,  Shinsuke HASHIMOTO

IPC: H01F1/34

Abstract: A core can be used for an electronic component, and composite particles constitute the core. The composite particles contain magnetic large particles, small particles directly or indirectly attached to surfaces of the large particles and have an average particle size smaller than an average particle size of the large particles, and a mutual buffer film covering at least part of the surfaces of the large particles located between the small particles existing around the large particles. When the average particle size of the large particles is R, the average particle size of the small particles is r, and an average thickness of the mutual buffer film is t, (r/R) is 0.0012 or more and 0.025 or less, (t/r) is larger than 0 and 0.7 or less, and r is 12 nm or more and 100 nm or less.