NOVELTY - An integrated back-sheet comprises homogeneous polymeric substrate having opposite first and second surfaces, with polymeric substrate having thickness of approximately 0.25 mm, polymeric substrate comprising chlorosulfonated polyolefin (20-95 wt.%), and adhesive (1-50 wt.%); electrically conductive metal wires disposed directly on first surface of homogeneous polymeric substrate, metal wires at least partially embedded in first surface of polymeric substrate, with homogeneous polymeric substrate adhering to metal wires; and second surface of homogeneous polymeric substrate at an exposed surface.    USE - Integrated back-sheet used for solar cell module with electrically connected solar cells (claimed).    ADVANTAGE - The back-sheet is durable and economical for back-contact photovoltaic module with integrated conductive circuitry.    DETAILED DESCRIPTION - An integrated back-sheet comprises homogeneous polymeric substrate having opposite first and second surfaces, with polymeric substrate having thickness of approximately 0.25 mm, polymeric substrate comprising chlorosulfonated polyolefin (20-95 wt.%), and adhesive (1-50 wt.%), and adhesive comprising thermoplastic and thermoset polymer adhesives and rosin based tackifiers; electrically conductive metal wires (42, 44) disposed directly on first surface of homogeneous polymeric substrate, metal wires at least partially embedded in first surface of polymeric substrate, with homogeneous polymeric substrate adhering to metal wires; and second surface of homogeneous polymeric substrate at an exposed surface. An INDEPENDENT CLAIM is included for a back-contact solar module.    DESCRIPTION OF DRAWING(S) - The drawing shows a cross-sectional view of the back-contact solar cell module in which a back-sheet with integrated conductive wires connected to the back contacts of solar cells.    Back-sheet (32)    Conductive metal wires (42, 44)    Interlayer dielectric (50)    Back side conductive pads (60)    Back side contact pads (61)