Plurality of flaky magnetic metal particles, pressed powder material, and rotating electric machine
US-2018258513-A1 · Sep 13, 2018 · US
Discrete metallic particles and multilayer structures comprising reflective core layers
US10998639B2 · US · B2
| Field | Value |
|---|---|
| Publication number | US-10998639-B2 |
| Application number | US-202016878723-A |
| Country | US |
| Kind code | B2 |
| Filing date | May 20, 2020 |
| Priority date | Jan 31, 2019 |
| Publication date | May 4, 2021 |
| Grant date | May 4, 2021 |
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- Title
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Abstract
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A metallic component including a metallic material and having a skin depth δ of greater than or equal to 1.0 μm in a frequency range from 20-40 GHz, as calculated by: δ = 2 ρ ( 2 π f ) ( μ 0 μ r ) ≈ 5 0 3 ρ μ r f . In this equation, δ is skin depth in meters (m); ρ is resistivity in ohm meter (Ω·m); f is frequency of an electromagnetic radiation in hertz (Hz); μ 0 is permeability; and μ r is relative permeability of the metallic material. The metallic component may be a discrete metallic particle or a layer in a multilayer thin film.
First claim
Opening claim text (preview).
What is claimed is: 1. A discrete metallic particle comprising: a metallic material, wherein the discrete metallic particle has a thickness from 50 nm to 1000 nm, and the discrete metallic particle has a skin depth δ of greater than or equal to 1.0 μm in a frequency range from 20-40 GHz, as calculated by: δ = 2 ρ ( 2 π f ) ( μ 0 μ r ) ≈ 5 0 3 ρ μ r f , wherein δ is skin depth in meters (m); ρ is resistivity in ohm meter (Ω·m); f is frequency of an electromagnetic radiation in hertz (Hz); μ 0 is permeability; and μ r is relative permeability of the metallic material. 2. The discrete metallic particle of claim 1 , wherein the discrete metallic particle has a skin depth δ of greater than or equal to 0.5 μm in a frequency range from 40-100 GHz, as calculated by: δ = 2 ρ ( 2 π f ) ( μ 0 μ r ) ≈ 5 0 3 ρ μ r f , wherein δ is skin depth in m; ρ is resistivity in Ω·m; f is frequency of an electromagnetic radiation in Hz; μ 0 is permeability; and μ r is relative permeability of the metallic material. 3. The discrete metallic particle of claim 1 , wherein the thickness of the discrete metallic particle is from 500 nm to 1000 nm. 4. A paint, polymer, or coating comprising the discrete metallic particle of claim 1 .
Assignees
Inventors
Classifications
- H01Q17/002Primary
using short elongated elements as dissipative material, e.g. metallic threads or flake-like particles · CPC title
including metal layer · CPC title
- C22C19/058Primary
without Mo and W · CPC title
Alloys based on chromium · CPC title
Reflecting paints; Signal paints · CPC title
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- What does patent US10998639B2 cover?
- A metallic component including a metallic material and having a skin depth δ of greater than or equal to 1.0 μm in a frequency range from 20-40 GHz, as calculated by: δ = 2 ρ ( 2 π f ) ( μ 0 μ r ) ≈ 5 0 3 ρ μ r f . …
- Who is the assignee on this patent?
- Toyota Eng & Mfg North America, Toyota Motor Co Ltd
- What technology area does this patent fall under?
- Primary CPC classification H01Q17/002. Mapped technology areas include Electricity.
- When was this patent published?
- Publication date Tue May 04 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 1 related publication on this page (citations in our corpus or others sharing the same primary CPC).