Packaging material for thin film lithium batteries
OwnerJohn B. Bates, Nancy J. Dudney +1inventors
InventorsJohn B. Bates, Nancy J. Dudney, Kim A. Weatherspoon
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Abstract
A thin film battery including components which are capable of reacting upon exposure to air and water vapor incorporates a packaging system which provides a barrier against the penetration of air and water vapor. The packaging system includes a protective sheath overlying and coating the battery components and can be comprised of an overlayer including metal, ceramic, a ceramic-metal combination, a parylene-metal combination, a parylene-ceramic combination or a parylene-metal-ceramic combination.
Claims29
In a thin film battery including a thin film-deposited lithium anode which is capable of reacting upon exposure to air and water vapor, the improvement comprising:
- a thin film-deposited protective sheath overlying and directly contacting the lithium anode of the battery so that every surface region of the lithium anode which is not contacted by another component of the thin-film battery is coated by the protective sheath so that the sheath provides a thin film barrier coating against the penetration of air and water vapor to the lithium anode.
An improved thin-film, electrochemical cell comprising:
- a) a substrate;
- b) a first conductive film and a second electrically conductive film which are each deposited on the surface of said substrate and in a spaced horizontal relationship from one another;
- c) a third film of electrically conductive cathode material deposited over said first film;
- d) a fourth film of an electrolyte having nitrogen contained therein deposited on and overlapping said third film to extend upon said first film and to partially extend upon a section of said substrate which separates said first and second films;
- e) a fifth film of electrically conductive anode material deposited over the remainder of said substrate separating said first and second films and over a portion of each of said second and fourth films;
- and
- f) a thin film-deposited outer sheath of a thin film protective coating which overlies and coats the films and which is nonreactive with said fifth film and provides a barrier against the penetration of air and water vapor.
In a thin film battery including components which are capable of reacting upon exposure to air and water vapor, the improvement comprising:
- a thin film-deposited protective sheath overlying and coating the battery components so that the sheath provides a thin film barrier against the penetration of air and water vapor wherein the protective sheath includes a layer of parylene which is in direct contact with at least one component of the battery, and the layer of parylene is a first layer and the sheath includes a second layer including material chosen from a group consisting of metal, ceramic and a metal-ceramic combination and wherein the second layer overlies the first layer.
In a thin film battery including components which are capable of reacting upon exposure to air and water vapor, the improvement comprising:
- a thin film-deposited protective sheath overlying and coating the battery components so that the sheath provides a thin film barrier against the penetration of air and water vapor;
- and
- a coating of ultraviolet-cured epoxy overlying the protective sheath.
Dependencies are inferred from the claim text.