Magnetic film
Assignee3M Innovative Properties Company
InventorsSeong-Woo Woo, Jung Ju Suh, Charles L. Bruzzone, Jennifer J. Sokol, Sergei A. Manuilov
Life of this patent
Estimating the term…
Abstract
A magnetic film includes iron and copper distributed between opposing first and second major surfaces of the magnetic film. The copper has a first atomic concentration C1 at a first depth d1 from the first major surface and a peak second atomic concentration C2 at a second depth d2 from the first major surface, d2>d1, C2/C1≥5.
Claims3
A magnetic film comprising at least iron, silicon, and manganese distributed between opposing first and second major surfaces of the magnetic film, the magnetic film having a plurality of interconnected cracks defining a plurality of electrically conductive islands, wherein the magnetic film has a ferromagnetic resonance frequency, fgc, that is at least five times greater than a ferromagnetic resonance frequency, fgun, of an identical magnetic film that does not include a plurality of interconnected cracks defining a plurality of electrically conductive islands.
A magnetic film comprising a plurality of interconnected channels forming a two-dimensional array of electrically conductive magnetic islands, the channels at least partially suppressing eddy currents induced within the magnetic film by a magnetic field, each magnetic island comprising copper having a peak atomic concentration inside the island, the magnetic film comprising a complex magnetic permeability comprising a real part μ′ and an imaginary part μ″, 6≤μ′/μ″≤14 at a frequency of 105 Hz, and μ′/μ″≤6 at a frequency of 3×105 Hz.
Dependencies are inferred from the claim text.