Protective coatings for sensitive materials

Details Protective coatings for sensitive materials Protective coatings for sensitive materials

1994-07-22

1997-08-05

Nakarani, D. S.

Stock material or miscellaneous articles

Structurally defined web or sheet

Including components having same physical characteristic in...

428216, 428332, 428334, 428422, 4284231, 428446, 428457, 428458, 428460, 428461, 428463, 4284744, 428688, 428689, 428696, 428697, 428699, 428701, 428933, B32B 702

Patent

active

056540841

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.TM.) 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.

REFERENCES:
patent: 4341841 (1982-07-01), Ohno et al.
patent: 4405678 (1983-09-01), Downing et al.
patent: 5032461 (1991-07-01), Shaw et al.
patent: 5037478 (1991-08-01), Okai et al.

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