公开(公告)号：US20220319766A1

公开(公告)日：2022-10-06

申请号：US17701448

申请日：2022-03-22

Applicant: TDK CORPORATION

Inventor： Akihiko OIDE ,  Makoto YOSHINO ,  Tomoki OKADA ,  Hideki SAITOU ,  Seiji OSADA ,  Kazuhiro EBINA ,  Kunio ODA ,  Takashi ABE ,  Akio SHIBATA ,  Kazuo IWAI

IPC: H01F27/29 ,  H01F17/00

Abstract: In the multi-layer coil component, the via conductor electrically connecting the coil layers adjacent to each other in the stacking direction of the element body protrudes from the coil region toward the side surface of the element body when viewed from the stacking direction of the element body. Therefore, the coil has a concave-convex portion. When a force is applied to the multi-layer coil component from the outside, the force is dispersed in the concave-convex portion of the coil, and thus defects are less likely to occur in the coil than in a coil in which the side of the side surfaces is flat.

公开(公告)号：US20220310312A1

公开(公告)日：2022-09-29

申请号：US17698561

申请日：2022-03-18

Applicant: TDK CORPORATION

Inventor： Akihiko OIDE ,  Makoto YOSHINO ,  Tomoki OKADA ,  Hideki SAITOU ,  Seiji OSADA ,  Kazuhiro EBINA ,  Kunio ODA ,  Takashi ABE ,  Akio SHIBATA ,  Kazuo IWAI

IPC: H01F27/29 ,  H01F27/28

Abstract: In the multi-layer coil component, the lead conductor is exposed from the end surface of the element body and is connected to the external electrode provided on the end surface. When the lead conductor is led out to the end surface of the element body, the lead area can be easily increased as compared with the case where the lead conductor is led out to the side surface of the element body. Therefore, by connecting the coil and the external electrode via the lead conductor, high connectivity between the coil and the external electrode is achieved.

公开(公告)号：US20220306541A1

公开(公告)日：2022-09-29

申请号：US17699972

申请日：2022-03-21

Applicant: TDK CORPORATION

Inventor： Kouichi KAKUDA ,  Takashi SUZUKI ,  Yukio TAKAHASHI ,  Kunihiko KAWASAKI ,  Hiroyuki TANOUE ,  Takehiro ISHII ,  Takuya NIIBORI ,  Takahiro SATO ,  Akihiko OIDE ,  Yasuhiro ITO ,  Takashi ENDO ,  Kunio ODA

IPC: C04B35/26

Abstract: A ferrite composition comprises a main component and a subcomponent. The main component includes 32.0 to 46.4 mol % of iron oxide in terms of Fe2O3, 4.4 to 14.0 mol % of copper oxide in terms of CuO, and 8.4 to 56.9 mol % of zinc oxide in terms of ZnO. The subcomponent includes 0.53 to 11.00 parts by weight of a silicon compound in terms of SiO2, 0.1 to 12.8 parts by weight of a tin compound in terms of SnO2, and 0.5 to 7.0 parts by weight of a bismuth compound in terms of Bi2O3, with respect to 100 parts by weight of the main component.