Magnetic film
US-11605499-B2 · Mar 14, 2023 · US
Magnetic film
US12176139B2 · US · B2
| Field | Value |
|---|---|
| Publication number | US-12176139-B2 |
| Application number | US-202318105980-A |
| Country | US |
| Kind code | B2 |
| Filing date | Feb 6, 2023 |
| Priority date | Aug 18, 2017 |
| Publication date | Dec 24, 2024 |
| Grant date | Dec 24, 2024 |
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- Title
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- Abstract
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Abstract
Official abstract text for this publication.
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.
First claim
Opening claim text (preview).
The invention claimed is: 1. A magnetic film comprising iron and copper distributed between opposing first and second major surfaces of the magnetic film, the copper having atomic concentrations C1 and C2 at the respective first and second major surfaces and respective depths d1 and d2 and a peak atomic concentration C3 at a third depth d3 in an interior region of the film between the first and second major surfaces, C3/Cs≥5, Cs being a greater of C1 and C2, wherein the magnetic film has been subjected to a cracking process such that the film comprises a two-dimensional array of electrically conductive magnetic islands separated by interconnected channels. 2. The magnetic film of claim 1 , wherein d1 and d3 are within 20% of each other. 3. 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 iron and a copper migration layer at each major surface of the magnetic island by migrating copper from an interior region of the magnetic island to the migration layer.
Assignees
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Classifications
Composite [nonstructural laminate] of inorganic material having metal-compound-containing layer and having defined magnetic layer · CPC title
made of combinations of electrically conductive material and ferromagnetic material · CPC title
- H01F10/131Primary
containing iron or nickel · CPC title
containing nanocrystallites, e.g. obtained by annealing · CPC title
Magnetic shielding materials · CPC title
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Frequently asked questions
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- What does patent US12176139B2 cover?
- 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.
- Who is the assignee on this patent?
- 3M Innovative Properties Company
- What technology area does this patent fall under?
- Primary CPC classification H01F10/131. Mapped technology areas include Electricity.
- When was this patent published?
- Publication date Tue Dec 24 2024 00:00:00 GMT+0000 (Coordinated Universal Time) (B2). Legal status and post-grant events are not shown on this page.
- What related patents are in patentsdb?
- We list 1 related publication on this page (citations in our corpus or others sharing the same primary CPC).