公开(公告)号：US20230035952A1

公开(公告)日：2023-02-02

申请号：US17870217

申请日：2022-07-21

Applicant: 3M INNOVATIVE PROPERTIES COMPANY

Inventor： Sang-jun Mo ,  Seong-Woo Woo ,  Jinwook Kim

IPC: H01F27/32 ,  H01F1/34 ,  H01F41/063

Abstract: The disclosure relates to a coil, a planar coil, and a method for making a coil. Specifically, according to an embodiment of the disclosure, a coil includes: main coil surfaces which are opposite each other and are substantially planar; and a multilayer film which is wound to form a plurality of loops which are substantially concentric, and the plurality of loops include an innermost loop including a first longitudinal direction end of the coil, and an outermost loop including a second longitudinal direction end of the coil, and the multilayer film includes a plurality of first electro-conductive layers which alternate with each other, and one or more second electrical insulation layer.