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US5169713A
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High frequency electromagnetic radiation absorbent coating comprising a binder and chips obtained from a laminate of alternating amorphous magnetic films and electrically insulating
Assignee: Commissariat à l'Énergie Atomique et Aux Énergies Alternatives
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Filing: 1991-02-13
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Granted: 1992-12-08
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Expires: 2011-02-13
Abstract
Abstract Radiation absorbent coating and process for its production. The radiation absorbent coating comprises a binder and chips able to absorb ultrahigh frequency electromagnetic radiation. The chips comprise a series of layers alternately constituted by electrically insulating layers (16, 20) and layers (14, 18) made from a stack of films of alternating amorphous magnetic films (50) and electrically insulating films (60) each from 2-5 nanometers thick.
Inventors
- 👤 Pierre Kumurdjian
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 19:56
CPC Classifications
H; H05; H05K; H05K9/00; H05K9/0073; H05K9/0081; H05K9/0083; C; C09; C09D; C09D5/00; C09D5/32; Y; Y10; Y10T; Y10T428/00; Y10T428/25; Y10T428/254; Y10T428/256; Y10T428/29; Y10T428/2982
Claims Analysis
Total Claims: 14
Claim 1
Independent Claim
71 words
Absorbent coating comprising a binder and a charge constituted by chips able to absorb electromagnetic radiation, wherein each of said chips comprises a stack of films alternately constituted by an amorphous magnetic film and an insulating film of electrically insulating material, each of said magnetic and insulating films having a thickness of from about 2 to 5 nanometers and wherein the resistivity of the stack of films exceeds approximately 5 ohm-cm.
Claim 2
Dependent Claim
71 words
Absorbent coating comprising a binder and a charge constituted by chips able to absorb electromagnetic radiation, wherein each of said chips comprises a stack of films alternately constituted by an amorphous magnetic film and an insulating film of electrically insulating material, each of said magnetic and insulating films having a thickness of from about 2 to 5 nanometers and wherein the resistivity of the stack of films exceeds approximately 5 ohm-cm.
Claim 3
Dependent Claim
91 words
Absorbent coating comprising a binder and a charge constituted by chips able to absorb electromagnetic radiation, wherein each of said chips comprise a series of layers alternately constituted by an electrically insulating layer and a layer made of a stack of films, said stack of films alternately constituted by an amorphous magnetic film and an insulating film of electrically insulating material, each of said magnetic and insulating films having a thickness of from about 2 to 5 nanometers and wherein the resistivity of the stack of films exceeds approximately 5 ohm-cm.
Claim 4
Dependent Claim
91 words
Absorbent coating comprising a binder and a charge constituted by chips able to absorb electromagnetic radiation, wherein each of said chips comprise a series of layers alternately constituted by an electrically insulating layer and a layer made of a stack of films, said stack of films alternately constituted by an amorphous magnetic film and an insulating film of electrically insulating material, each of said magnetic and insulating films having a thickness of from about 2 to 5 nanometers and wherein the resistivity of the stack of films exceeds approximately 5 ohm-cm.
Claim 5
Dependent Claim
22 words
Absorbent coating according to claim 1 or 2, wherein the thickness of each of said amorphous magnetic films is approximately 3 nm.
Claim 6
Dependent Claim
21 words
Absorbent coating according to claim 1 or 2, wherein the thickness of each of said insulating films is approximately 5 nm.
Claim 7
Dependent Claim
16 words
Absorbent coating according to claim 1 or 2, wherein said insulating films are made of carbon.
Claim 8
Dependent Claim
18 words
Absorbent coating according to claim 1 or 2, wherein said insulating films are made of an organic material.
Claim 9
Dependent Claim
16 words
Absorbent layer comprising at least one layer of a coating according to claim 1 or 2.
Claim 10
Dependent Claim
33 words
Absorbent layer comprising at least one layer of a coating according to claim 1 or 2 and wherein said insulating films are selected from the group consisting of carbon and an organic material.
Claim 11
Dependent Claim
87 words
A process for the production of an absorbent coating able to absorb electromagnetic radiation comprising the steps of: depositing on a substrate a stack of films alternately constituted by an amorphous magnetic film and an insulating film of electrically insulating material, each of said magnetic and insulating films having a thickness of from about 2 to 5 nanometers, and wherein the resistivity of the stack of films exceeds approximately 5 ohm-cm, breaking up said stack to reduce it into chips, and mixing said chips with a binder.
Claim 12
Dependent Claim
87 words
A process for the production of an absorbent coating able to absorb electromagnetic radiation comprising the steps of: depositing on a substrate a stack of films alternately constituted by an amorphous magnetic film and an insulating film of electrically insulating material, each of said magnetic and insulating films having a thickness of from about 2 to 5 nanometers, and wherein the resistivity of the stack of films exceeds approximately 5 ohm-cm, breaking up said stack to reduce it into chips, and mixing said chips with a binder.
Claim 13
Dependent Claim
104 words
A process for the production of an absorbent coating for absorbing electromagnetic radiation comprising the steps of: depositing on a substrate a series of layers alternately constituted by an electrically insulating layer and a layer made of a stack of films, said stack of films alternately constituted by an amorphous magnetic film and an insulating film of electrically insulating material, said magnetic and insulating films having a thickness of from about 2 to 5 nanometers, wherein the resistivity of the stack of films exceeds approximately 5 ohm-cm and breaking up said stack to reduce it into chips, and mixing said chips with a binder.
Claim 14
Dependent Claim
104 words
A process for the production of an absorbent coating for absorbing electromagnetic radiation comprising the steps of: depositing on a substrate a series of layers alternately constituted by an electrically insulating layer and a layer made of a stack of films, said stack of films alternately constituted by an amorphous magnetic film and an insulating film of electrically insulating material, said magnetic and insulating films having a thickness of from about 2 to 5 nanometers, wherein the resistivity of the stack of films exceeds approximately 5 ohm-cm and breaking up said stack to reduce it into chips, and mixing said chips with a binder.
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| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
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| 3.5 Years (Year 4) | 1995-12-08 | 1996-06-08 | 1996-12-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1999-12-08 | 2000-06-08 | 2000-12-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2003-12-08 | 2004-06-08 | 2004-12-08 | $7700.00 | Window Closed / Lapsed |