US 12,084,735 B2
Metal strip and manufacturing method therefor, magnetic core, and coil component
Gota Shinohara, Nagaokakyo (JP)
Assigned to Murata Manufacturing Co., Ltd., Kyoto-fu (JP)
Filed by Murata Manufacturing Co., Ltd., Kyoto-fu (JP)
Filed on Dec. 22, 2020, as Appl. No. 17/131,605.
Application 17/131,605 is a continuation of application No. PCT/JP2019/021934, filed on Jun. 3, 2019.
Claims priority of application No. 2018-124186 (JP), filed on Jun. 29, 2018.
Prior Publication US 2021/0108280 A1, Apr. 15, 2021
Int. Cl. C21D 8/12 (2006.01); C22C 45/02 (2006.01); H01F 3/04 (2006.01); H01F 17/04 (2006.01); H01F 27/06 (2006.01); H01F 27/42 (2006.01); H01F 17/00 (2006.01)
CPC C21D 8/1211 (2013.01) [C22C 45/02 (2013.01); H01F 3/04 (2013.01); H01F 17/04 (2013.01); H01F 27/06 (2013.01); H01F 27/42 (2013.01); C22C 2202/02 (2013.01); H01F 2017/0093 (2013.01)] 16 Claims
OG exemplary drawing
 
1. A metal strip comprising:
a metal magnetic material as a main component, the metal strip having a film shape and being configured such that a surface roughness of one main surface is higher than a surface roughness of an other main surface,
wherein the other main surface has a smooth surface having a surface smoothness higher than a surface smoothness of at least the one main surface in terms of an arithmetic mean height that is a three-dimensional surface texture parameter,
the one main surface has a striped pattern, including a recessed portion and a protruding portion, that is continuous along the one main surface, and
the surface roughness of the one main surface is greater than or equal to five times as high as the surface roughness of the other main surface in terms of an arithmetic mean height that is a three-dimensional surface texture parameter.