Magnetic shielding member and wireless power receiver including the same
US-2017223878-A1 · Aug 3, 2017 · US
Magnetic film and coil module
US11056270B2 · US · B2
| Field | Value |
|---|---|
| Publication number | US-11056270-B2 |
| Application number | US-201716073852-A |
| Country | US |
| Kind code | B2 |
| Filing date | Feb 22, 2017 |
| Priority date | Mar 1, 2016 |
| Publication date | Jul 6, 2021 |
| Grant date | Jul 6, 2021 |
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- Title
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Abstract
Official abstract text for this publication.
A magnetic film includes a first layer having a real part of complex magnetic permeability of 50 or more and an imaginary part of complex magnetic permeability of below 30 at 10 MHz, and a second layer provided on the first layer and having a real part of complex magnetic permeability of 50 or more and an imaginary part of complex magnetic permeability of 30 or more at 10 MHz.
First claim
Opening claim text (preview).
The invention claimed is: 1. A magnetic film comprising: a first layer having a real part of complex magnetic permeability of 50 or more and an imaginary part of complex magnetic permeability of below 30 at 10 MHz, and a second layer provided on the first layer and having a real part of complex magnetic permeability of 50 or more and an imaginary part of complex magnetic permeability of 30 or more at 10 MHz. 2. The magnetic film according to claim 1 , wherein the real part of complex magnetic permeability of the second layer is higher than that of the first layer. 3. The magnetic film according to claim 1 , wherein the thickness of the second layer is smaller than that of the first layer. 4. The magnetic film according to claim 3 , wherein the ratio of the thickness of the second layer to that of the first layer is ½ or less. 5. The magnetic film according to claim 1 , wherein the first layer contains soft magnetic particles and a resin. 6. The magnetic film according to claim 1 , wherein the first layer is made of a sintered body of a soft magnetic oxide. 7. The magnetic film according to claim 1 , wherein the second layer contains soft magnetic particles and a resin. 8. A coil module for wireless communication or wireless power transmission using a frequency band of 13.56 MHz or 6.78 MHz comprising: a coil board including a board and a coil pattern provided at one side in a thickness direction of the board, and the magnetic film according to claim 1 provided at one side in the thickness direction of the coil module so as to allow the first layer to face the coil pattern.
Assignees
Inventors
Classifications
- H01F1/147Primary
Alloys characterised by their composition {(treatment thereof for enhancing their electromagnetic properties C21D8/12)} · CPC title
Electric or magnetic properties · CPC title
by macromolecular organic substances · CPC title
- H01F27/2804Primary
Printed windings · CPC title
Oxides (H01F1/36 and H01F1/38 take precedence) · CPC title
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- What does patent US11056270B2 cover?
- A magnetic film includes a first layer having a real part of complex magnetic permeability of 50 or more and an imaginary part of complex magnetic permeability of below 30 at 10 MHz, and a second layer provided on the first layer and having a real part of complex magnetic permeability of 50 or more and an imaginary part of complex magnetic permeability of 30 or more at 10 MHz.
- Who is the assignee on this patent?
- Nitto Denko Corp
- What technology area does this patent fall under?
- Primary CPC classification H01F1/147. Mapped technology areas include Electricity.
- When was this patent published?
- Publication date Tue Jul 06 2021 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 3 related publications on this page (citations in our corpus or others sharing the same primary CPC).