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1. (WO2007011900) THIN-FILM BATTERIES WITH SOFT AND HARD ELECTROLYTE LAYERS AND METHOD
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What is claimed is:

1. An apparatus comprising:
a battery cell having a positive electrode, a negative electrode, and an electrolyte structure therebetween, wherein the electrolyte structure includes a soft electrolyte layer and at least one hard electrolyte layer.

2. The apparatus of claim 1, wherein the electrolyte structure includes a hard electrolyte layer on the negative electrode, and the soft electrolyte layer is sandwiched between the positive electrode and the hard electrolyte layer on the negative electrode.

3. The apparatus of claim 2, wherein the soft electrolyte layer includes a polyphosphazene and a lithium salt.

4. The apparatus of claim 1, wherein the soft electrolyte layer includes MEEP and a lithium salt.

5. The apparatus of claim 1, further comprising:
an encapsulating material surrounding the battery cell; and
one or more electrical leads connecting from the battery cell to an exterior of the encapsulating material.

6. The apparatus of claim 1, further comprising:
an electronic device; and
a housing holding the electrical device, wherein the battery cell is within the housing and supplies power to the electronic device.

7. An apparatus comprising:
a battery cell having a positive electrode, a negative electrode, and an electrolyte structure therebetween, wherein the electrolyte structure includes a hard electrolyte layer on the positive electrode and a hard electrolyte layer on the negative electrode, and the soft electrolyte layer is sandwiched between the hard electrolyte layer on the positive electrode and the hard electrolyte layer on the negative electrode.

8. The apparatus of claim 7, wherein the soft electrolyte layer includes a polyphosphazene.

9. The apparatus of claim 7, wherein the hard electrolyte layer on the positive electrode includes LiPON and the hard electrolyte layer on the negative electrode includes LiPON.

10. The apparatus of claim 9 wherein the soft electrolyte layer includes a polyphosphazene.

11. The apparatus of claim 7, wherein the soft electrolyte layer includes MEEP.

12. The apparatus of claim 7, further comprising:
an encapsulating material surrounding the battery cell; and
one or more electrical leads connecting from the battery cell to an exterior of the encapsulating material.

13. The apparatus of claim 7, further comprising:
an electronic device; and
a housing holding the electrical device, wherein the battery cell is within the housing and supplies power to the electronic device.

14. A method comprising:
providing a positive electrode component;
providing a negative electrode component;
coating at least the negative electrode component with a hard electrolyte layer; and
forming a battery cell using the positive electrode component, the negative electrode component that is coated with the hard electrolyte layer, and a soft electrolyte layer in between.

15. The method of claim 14, further comprising:
coating the positive electrode component with a hard electrolyte layer, wherein an electrolyte structure of the battery cell includes the hard electrolyte layer on the negative electrode, the hard electrolyte layer on the positive electrode, and the soft electrolyte layer that is sandwiched between the hard electrolyte layer on the positive electrode and the hard electrolyte layer on the negative electrode.

16. The method of claim 14, wherein the soft electrolyte layer includes a polyphosphazene and a lithium salt.

17. The method of claim 14, wherein the soft electrolyte layer includes MEEP and a lithium salt.

18. A method comprising:
providing a positive electrode component;
providing a negative electrode component;
coating the negative electrode component with a hard electrolyte layer;
coating the positive electrode component with a hard electrolyte layer; and
forming a battery cell using the positive electrode component that is coated with the hard electrolyte layer, the negative electrode component that is coated with the hard electrolyte layer, and a soft electrolyte layer in between.

19. The method of claim 18, wherein the hard electrolyte layer on the positive electrode includes LiPON and the hard electrolyte layer on the negative electrode includes LiPON.

20. The method of claim 19, wherein the soft electrolyte layer includes a polyphosphazene and a lithium salt.

21. The method of claim 19, wherein the soft electrolyte layer includes a gel.

22. The method of claim 19, wherein the soft electrolyte layer includes a polyvinylidene difluoride, propylene carbonate, and a lithium salt.

23. An apparatus comprising:
a positive electrode component coated with a hard electrolyte layer;
a negative electrode component coated with a hard electrolyte layer; and
electrolyte means for connecting the hard electrolyte layer on the negative electrode component to the hard electrolyte layer on the positive electrode component to form a battery cell.

24. The apparatus of claim 23, wherein the means for connecting further includes:
means for fixing defects in one or more of the hard electrolyte layers.

25. The apparatus of claim 23, wherein the hard electrolyte layer on the positive electrode includes LiPON and the hard electrolyte layer on the negative electrode includes LiPON.

26. The apparatus of claim 25, wherein the means for connecting includes a
polyphosphazene and a lithium salt.

27. The apparatus of claim 26, wherein the means for connecting includes MEEP.

28. The apparatus of claim 23, further comprising: >
an encapsulating material surrounding the battery cell; and
one or more electrical leads connecting from the battery cell to an exterior of the encapsulating material.

29. The apparatus of claim 23 , further comprising:
an electronic device; wherein the battery cell supplies power to at least a portion of the electronic device.