Stacked film battery architecture

A method for fabricating a stacked battery structure, the method comprising:

• forming a plurality of battery layers separately, wherein each battery layer includes a substrate, a film battery element fabricated on the substrate and an insulator formed over the film battery element, the insulator having a flat top surface and the film battery element including a current collector;
• stacking the plurality of battery layers, wherein the insulator of a first battery layer of the plurality of battery layers bonds to the substrate of a second battery layer of the plurality of battery layers by the flat top surface;
• and
• forming a through via within the plurality of battery layers and exposed at the top of each battery layer, the through via connecting with at least one of the current collectors of the plurality of battery layers.

A method for fabricating a stacked battery structure, the method comprising:

• forming a plurality of battery layers separately, wherein each battery layer includes a substrate, a film battery element fabricated on the substrate and an insulator formed over the film battery element, the film battery element including a current collector;
• stacking the plurality of battery layers;
• and
• forming a through via within the plurality of battery layers and exposed at the top of each battery layer, the through via connecting with at least one of the current collectors of the plurality of battery layers.