US 12,315,663 B2
Inductor
Eiji Iso, Nagaokakyo (JP); Yuki Kitashima, Nagaokakyo (JP); Yoshiharu Satou, Nagaokakyo (JP); Noriyuki Ookawa, Nagaokakyo (JP); and Hiroshi Marusawa, Nagaokakyo (JP)
Assigned to Murata Manufacturing Co., Ltd., Kyoto-fu (JP)
Filed by Murata Manufacturing Co., Ltd., Kyoto-fu (JP)
Filed on Oct. 5, 2021, as Appl. No. 17/494,629.
Claims priority of application No. 2020-168438 (JP), filed on Oct. 5, 2020; and application No. 2020-168439 (JP), filed on Oct. 5, 2020.
Prior Publication US 2022/0108824 A1, Apr. 7, 2022
Int. Cl. H01F 27/02 (2006.01); H01F 1/12 (2006.01); H01F 27/255 (2006.01); H01F 27/28 (2006.01); H01F 27/29 (2006.01); H01F 41/02 (2006.01)
CPC H01F 27/022 (2013.01) [H01F 1/12 (2013.01); H01F 27/255 (2013.01); H01F 27/2823 (2013.01); H01F 27/292 (2013.01); H01F 41/0246 (2013.01)] 16 Claims
OG exemplary drawing
 
1. An inductor comprising:
a body including soft magnetic powder and resin,
a coil embedded in the body,
outer electrodes on the body, and
a protective film on a surface of the body,
wherein the protective film has a thickness of 10 μm or more and includes silica particles and resin; and,
in the protective film, the silica particles have an average diameter of 15 nm to 75 nm, and a percentage by weight of the silica particles to the resin is between 150% and 250%.