US5654084A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Protective coatings for sensitive materials
Assignee: Lockheed Martin Energy Systems Inc
•
Filing: 1994-07-22
•
Granted: 1997-08-05
•
Expires: 2014-07-22
Abstract
Abstract An enhanced protective coating to prevent interaction between constituents of the environment and devices that can be damaged by those constituents. This coating is provided by applying a synergistic combination of diffusion barrier and physical barrier materials. These materials can be, for example, in the form of a plurality of layers of a diffusion barrier and a physical barrier, with these barrier layers being alternated. Further protection in certain instances is provided by including at least one layer of a getter material to actually react with one or more of the deleterious constituents. The coating is illustrated by using alternating layers of an organic coating (such as Parylene-C™) as the diffusion barrier, and a metal coating (such as aluminum) as the physical barrier. For best results there needs to be more than one of at least one of the constituent layers.
Inventors
- 👤 Charles M. Egert
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 19:33
CPC Classifications
B; B05; B05D; B05D7/00; B05D7/50; B05D7/56; B05D7/58; B05D1/00; B05D1/60; Y; Y10; Y10S; Y10S428/00; Y10S428/922; Y10S428/9265; Y10S428/933; Y10T; Y10T428/00; Y10T428/24; Y10T428/24942; Y10T428/2495; Y10T428/24967; Y10T428/24975; Y10T428/26; Y10T428/263; Y10T428/31504; Y10T428/3154; Y10T428/31544; Y10T428/31551; Y10T428/31678; Y10T428/31681; Y10T428/31688; Y10T428/31692; Y10T428/31699; Y10T428/31725
Claims Analysis
Total Claims: 18
Claim 1
Independent Claim
129 words
A protective coating for preventing corrosion by deleterious interaction between constituents of an environment and a substrate material placed within that environment, said coating comprising: a plurality of continuous layers of a diffusion barrier material that is solid in the environment to deter diffusion of the constituents toward the substrate material; a plurality of continuous layers of a physical barrier material interleaved with said continuous layers of diffusion barrier material to deter transport of the constituents toward the substrate material; and at least one continuous layer of a getter material disposed between one of said plurality of continuous layers of said diffusion barrier material and one of said plurality of continuous layers of said physical barrier material to interact with at least one of the constituents of the environment.
Claim 2
Dependent Claim
129 words
A protective coating for preventing corrosion by deleterious interaction between constituents of an environment and a substrate material placed within that environment, said coating comprising: a plurality of continuous layers of a diffusion barrier material that is solid in the environment to deter diffusion of the constituents toward the substrate material; a plurality of continuous layers of a physical barrier material interleaved with said continuous layers of diffusion barrier material to deter transport of the constituents toward the substrate material; and at least one continuous layer of a getter material disposed between one of said plurality of continuous layers of said diffusion barrier material and one of said plurality of continuous layers of said physical barrier material to interact with at least one of the constituents of the environment.
Claim 3
Dependent Claim
21 words
The protective coating of claim 1 wherein said physical barrier material is selected from the group consisting of metals and ceramics.
Claim 4
Dependent Claim
25 words
The protective coating of claim 2 wherein said physical barrier material is a metal selected from the group consisting of aluminum, gold, silicon and molybdenum.
Claim 5
Dependent Claim
29 words
The protective coating of claim 2 wherein said physical barrier material is a ceramic selected from the group consisting of silicon dioxide, silicon carbide, aluminum oxide and magnesium fluoride.
Claim 6
Dependent Claim
38 words
The protective coating of claim 1 wherein said diffusion barrier material is selected from the group consisting of polyamides, polyethylenes, poly (p-xylylene)s, fluoropolymers, polyacrylates, silicone polymers, polyurethanes, a carbon exhibiting properties similar to diamond, amorphous carbon and silicon.
Claim 7
Dependent Claim
35 words
The protective coating of claim 1 wherein said plurality of continuous layers of said diffusion barrier material and said plurality of continuous layers of said physical barrier material are formed in situ upon the substrate.
Claim 8
Dependent Claim
30 words
The protective coating of claim 1 wherein said plurality of continuous layers of said diffusion barrier material and said physical barrier material are preformed for subsequent encapsulation of the substrate.
Claim 9
Dependent Claim
27 words
The protective coating of claim 1 wherein each said diffusion barrier layer and said physical barrier layer has a thickness of about 0.5 to about 100 micrometers.
Claim 10
Dependent Claim
40 words
The protective coating of claim 1 further comprising a plurality of continuous layers of a getter material interleaved between said plurality of continuous layers of said diffusion barrier material and said plurality of continuous layers of said physical barrier material.
Claim 11
Dependent Claim
21 words
The protective coating of claim 1 wherein said diffusion barrier material is a poly(p-xylylene) and said physical barrier material is aluminum.
Claim 12
Dependent Claim
93 words
A protective coating for preventing corrosion by deleterious interaction between constituents of an environment and a substrate material placed within that environment, said coating comprising; a plurality of continuous layers of a diffusion barrier material that is solid in the environment to deter diffusion of the constituents toward the substrate material; a plurality of continuous layers of a physical barrier material to deter transport of the constituents toward the substrate material, said physical barrier material being a ceramics selected from the group consisting of silicon dioxide, silicon carbide, aluminum oxide and magnesium fluoride.
Claim 13
Dependent Claim
93 words
A protective coating for preventing corrosion by deleterious interaction between constituents of an environment and a substrate material placed within that environment, said coating comprising; a plurality of continuous layers of a diffusion barrier material that is solid in the environment to deter diffusion of the constituents toward the substrate material; a plurality of continuous layers of a physical barrier material to deter transport of the constituents toward the substrate material, said physical barrier material being a ceramics selected from the group consisting of silicon dioxide, silicon carbide, aluminum oxide and magnesium fluoride.
Claim 14
Dependent Claim
28 words
The protective coating of claim 11 wherein each said diffusion barrier layer and each said physical barrier layer has a thickness from about 0.5 to about 100 micrometers.
Claim 15
Dependent Claim
29 words
The protective coating of claim 11 wherein said plurality of continuous layers of said diffusion barrier material and said physical barrier material are formed in situ upon the substrate.
Claim 16
Dependent Claim
30 words
The protective coating of claim 11 wherein said plurality of continuous layers of said diffusion barrier material and said physical barrier material are preformed for subsequent encapsulation of the substrate.
Claim 17
Dependent Claim
38 words
The protective coating of claim 11 wherein said diffusion barrier material is selected from the group consisting of polyamides, polyethylenes, poly (p-xylylenes)s, fluropolymers, polyacylates, silicon polymers, polyurethanes, a carbon exhibiting properties similar to diamond, amorphous carbon and silicon.
Claim 18
Dependent Claim
14 words
The protective coating of claim 15 wherein said diffusion barrier material is a poly(p-xylylene).
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 2000-08-04 | 2001-02-03 | 2001-08-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2004-08-04 | 2005-02-03 | 2005-08-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2008-08-04 | 2009-02-03 | 2009-08-05 | $7700.00 | Window Closed / Lapsed |