公开(公告)号：US20200258666A1

公开(公告)日：2020-08-13

申请号：US16755641

申请日：2018-10-11

Applicant: 3M INNOVATIVE PROPERTIES COMPANY

Inventor： Xiaoming Kou ,  Steven D. Theiss ,  Charles L. Bruzzone ,  Michael S. Graff ,  Benjamin P. Mize

IPC: H01F1/153

Abstract: High frequency power inductor material having first and second opposed major surfaces, comprising a thermosetting binder and a plurality of multilayered flakes dispersed in the high temperature binder, the multilayered flakes comprising at least two layer pairs, wherein each layer pair comprises a ferromagnetic layer and a dielectric electrical isolation layer so that the ferromagnetic layers are electrically isolated from each other by dielectric layers, and wherein the multilayered flakes are substantially aligned parallel to the first and second major surfaces such that they do not provide an electrically continuous path over a range of greater than 0.5 mm. Exemplary high frequency power inductor materials described herein are useful, for example, as a power inductor in Point of Load converters, low profile inductors for inductive—capacitive (LC) filters (e.g., for global system for mobile communication (GSM) pulse noise suppression in cellular phone speakers), or other applications wherein compact, inductive elements are required on a circuit board.