公开(公告)号：US20210202167A1

公开(公告)日：2021-07-01

申请号：US17121526

申请日：2020-12-14

Applicant: TAIYO YUDEN CO., LTD.

Inventor： Norihiro ASAKO ,  Kenji YAZAWA ,  Makoto AOKI ,  Tomomi KOBAYASHI

IPC: H01F41/02 ,  H01F1/34

Abstract: When manufacturing a magnetic body whose primary component is Ni—Zn ferrite, an iron oxide powder whose Mn content is 0.20 to 0.85 percent by mass is used as a raw material powder, or, in addition to using an iron oxide powder whose Mn content is 0.20 percent by mass or higher as a raw material powder, a mol ratio of Ni to Zn (Ni/Zn) in the ferrite material is determined based on the Mn content in the iron oxide powder and the raw material powders are compounded in such a way that the mol ratio is achieved. The magnetic body does not contain any additives as essential components other than the primary components of the Ni—Zn ferrite material. A coil component using the magnetic body has excellent direct-current superimposition property and magnetic permeability.

公开(公告)号：US20160233019A1

公开(公告)日：2016-08-11

申请号：US15132102

申请日：2016-04-18

Applicant: TAIYO YUDEN CO., LTD.

Inventor： Hitoshi MATSUURA ,  Tomomi KOBAYASHI ,  Yoshikazu OKINO ,  Hidemi IWAO ,  Kenichiro NOGI ,  Kenji OTAKE

IPC: H01F27/28 ,  H01F27/29 ,  H01F1/08 ,  H01F27/255 ,  H01F1/047

CPC classification number: H01F27/2823 ,  H01F1/047 ,  H01F1/08 ,  H01F17/0033 ,  H01F27/255 ,  H01F27/2804 ,  H01F27/29 ,  H01F2027/2809

Abstract: A coil component is of the type where a helical coil is directly contacting a magnetic body where such coil component still meets the demand for electrical current amplification. The coil component is structured in such a way that a helical coil is covered with a magnetic body. The magnetic body is mainly constituted by magnetic alloy grains and contains substantially no glass component, and each of the magnetic alloy grains has an oxide film of the grain on its surface.

Abstract translation: 线圈部件是螺旋线圈直接接触磁体的类型，其中这种线圈部件仍然满足电流放大的需求。 线圈部件被构造成使得螺旋线圈被磁体覆盖。 磁性体主要由磁性合金粒子构成，基本上不含玻璃成分，磁性合金粒子的表面具有粒状的氧化膜。

公开(公告)号：US20230035861A1

公开(公告)日：2023-02-02

申请号：US17950759

申请日：2022-09-22

Applicant: TAIYO YUDEN CO., LTD.

Inventor： Norihiro ASAKO ,  Kenji YAZAWA ,  Makoto AOKI ,  Tomomi KOBAYASHI

IPC: H01F41/02 ,  C04B35/26 ,  H01F27/28 ,  H01F1/34 ,  H01F41/04

Abstract: When manufacturing a magnetic body which is made of a ferrite material containing Fe, Ni, and Zn, and whose Mn content is 0.1288 percent by mass or higher, or a magnetic body which is made of a ferrite material containing Fe, Ni, Zn, and Cu, and whose Mn content is 0.1178 percent by mass or higher, an iron oxide powder whose Mn content is 0.20 percent by mass or higher is used as a raw material powder.