Patent ID: 11876233
Assignee: INTERNATIONAL BUSINESS MACHINES CORPORATION
Field: Electrical machinery, apparatus, energy (Electrical engineering)
Classification: CPC H  Y | IPC H

Claim 7:
8. A structure of Thin Film Battery (TFB) layers, the structure comprising:
a plurality of battery layers, each battery layer comprising:
a substrate, having a top surface, a bottom surface, and one or more substrate edges;
a first electrode connection disposed on the top surface;
a second electrode connection disposed on the top surface, the second electrode connection not electrically connected to the first electrode connection;
a first electrode electrically connected to the first electrode connection, at least part of the first electrode disposed on the first electrode connection;
a second electrode electrically connected to the second electrode connection, at least part of the second electrode disposed on the second electrode connection;
an electrolyte, at least part of the electrolyte disposed between and electrically connected to the first and second electrodes;
a first edge connection disposed on one of the substrate edges, the first edge connection being physically and electrically connected to the first electrode connection;
a second edge connection disposed on one of the substrate edges, the second edge connection being physically and electrically connected to the second electrode connection;
an electrically insulating lamination disposed on the substrate and covering the first electrode connection except for the first edge connection, the second electrode connection except for the second edge connection, the first electrode, the electrolyte, and the second electrode; and

wherein the first electrode and the second electrode are within one of the TFB layers, respectively, and further comprising:
a first stack external electrical connection connecting two or more of the first edge connections;
a second stack external electrical connection connecting two or more of the second edge connections,
wherein the first stack external connection electrically connects each of the first edge connections at a respective substrate edge on which the first edge connection is disposed, the first stack external connection forming a first battery pole,
wherein the second stack external connection, electrically connects each of the second edge connections at a respective substrate edge on which the second edge is disposed, the second stack external connection forming a second battery pole,
wherein the substrate is between 0.5 microns and 5 microns in thickness, and
wherein the substrate has a root mean squared (RMS) of surface roughness between 1 nanometer (nm) and 250 nanometer (nm) per square millimeter (mm2) of surface area of the substrate.