Protective coatings for sensitive materials
First Claim
1. 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.
1 Assignment
0 Petitions
Accused Products
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.
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Citations
16 Claims
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1. 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:
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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. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
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11. 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;
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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. - View Dependent Claims (12, 13, 14, 15, 16)
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Specification