Thin film battery and method for making same
First Claim
1. A thin-film electrochemical cell comprising:
- a) a substrate;
b) a first and a second electrically conductive film deposited on the surface of said substrate, said first and second films separated horizontally and said first film larger than said second film;
c) a third film of electrically conductive material deposited over said first film;
d) a fourth film of an electrolyte overlapping said third film to extend upon said first film and to partially extend upon said substrate separating said first and second films, said electrolyte having the composition Lix POy Nz where x has an approximate value of 2.8, 2y=3z has an approximate value of 7.8 and z has a value between 0.16 and 0.46; and
e) a fifth film of electrically conductive and chemically active material deposited over the remainder of said substrate separating said first and second films and over substantially all of said second and said fourth films, said fifth film being electrochemically stable in contact with said fourth film.
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Accused Products
Abstract
Described is a thin-film battery, especially a thin-film microbattery, and a method for making same having application as a backup or primary integrated power source for electronic devices. The battery includes a novel electrolyte which is electrochemically stable and does not react with the lithium anode and a novel vanadium oxide cathode Configured as a microbattery, the battery can be fabricated directly onto a semiconductor chip, onto the semiconductor die or onto any portion of the chip carrier. The battery can be fabricated to any specified size or shape to meet the requirements of a particular application. The battery is fabricated of solid state materials and is capable of operation between -15° C. and 150° C.
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Citations
6 Claims
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1. A thin-film electrochemical cell comprising:
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a) a substrate; b) a first and a second electrically conductive film deposited on the surface of said substrate, said first and second films separated horizontally and said first film larger than said second film; c) a third film of electrically conductive material deposited over said first film; d) a fourth film of an electrolyte overlapping said third film to extend upon said first film and to partially extend upon said substrate separating said first and second films, said electrolyte having the composition Lix POy Nz where x has an approximate value of 2.8, 2y=3z has an approximate value of 7.8 and z has a value between 0.16 and 0.46; and e) a fifth film of electrically conductive and chemically active material deposited over the remainder of said substrate separating said first and second films and over substantially all of said second and said fourth films, said fifth film being electrochemically stable in contact with said fourth film. - View Dependent Claims (2, 3, 4, 5, 6)
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Specification