公开(公告)号：US20170154720A1

公开(公告)日：2017-06-01

申请号：US15363938

申请日：2016-11-29

Applicant: TDK Corporation

Inventor： Hitoshi OHKUBO ,  Kyohei TONOYAMA ,  Shigeki SATO

IPC: H01F27/255 ,  H01F27/29 ,  H01F27/32 ,  H01F27/42 ,  H01F27/02 ,  H01F27/28

CPC classification number: H01F27/255 ,  H01F17/0013 ,  H01F17/04 ,  H01F27/022 ,  H01F27/2804 ,  H01F27/292 ,  H01F27/324 ,  H01F27/42 ,  H01F2017/048 ,  H01F2027/2809

Abstract: A coil device comprising a coil, and a magnetic metal powder containing resin covering said coil. Said magnetic metal powder comprises at least two types of magnetic metal powders with different D50. The magnetic metal powder having larger D50 is defined as a large diameter powder, and the magnetic metal powder having smaller D50 is defined as a small diameter powder among the two types of said magnetic metal powder. Said large diameter powder is made of iron or iron based alloy. Said small diameter powder is made of Ni—Fe alloy. Said small diameter powder has D50 of 0.5 to 1.5 μm. Said large diameter powder and said small diameter powder respectively comprises an insulation coating layer.

公开(公告)号：US20130249664A1

公开(公告)日：2013-09-26

申请号：US13848441

申请日：2013-03-21

Applicant: TDK CORPORATION

Inventor： Kyohei TONOYAMA ,  Makoto MORITA ,  Tomokazu ITO ,  Hitoshi OHKUBO ,  Manabu OHTA ,  Yoshihiro MAEDA ,  Yuuya KANAME ,  Hideharu MORO

IPC: H01F41/04 ,  H01F27/255

CPC classification number: H01F41/04 ,  H01F17/0013 ,  H01F27/255 ,  H01F27/292 ,  H01F41/046 ,  H01F2017/046

Abstract: In a planar coil element and a method for producing the same, a metal magnetic powder-containing resin containing an oblate or needle-like first metal magnetic powder contains a second metal magnetic powder having an average particle size (1 μm) smaller than that (32 μm) of the first metal magnetic powder, which significantly reduces the viscosity of the metal magnetic powder-containing resin. Therefore, the metal magnetic powder-containing resin is easy to handle when applied to enclose a coil unit, which makes it easy to produce the planar coil element.

Abstract translation: 在平面线圈元件及其制造方法中，含有扁平或针状的第一金属磁性粉末的含金属磁性粉末的树脂含有平均粒径（1μm）小于（ 32微米）的第一金属磁性粉末，这显着降低了含金属磁性粉末的树脂的粘度。 因此，当用于包围线圈单元时，含金属磁性粉末的树脂易于处理，这使得容易制造平面线圈元件。