NOVELTY - Assembly comprises polyimide film having aromatic polyimide derived from aromatic dianhydhde being rigid rod type dianhydride, and aromatic diamine being rigid rod type diamine, and filler; absorber layer (14); and electrode supported by polyimide film, where electrode is between the absorber layer and the polyimide film, and electrode is in electrical communication with the absorber layer.    USE - As assembly (claimed) such as copper indium gallium di-selenide (CIGS)/copper indium di-selenide (CIS) type assembly, in solar cell.    ADVANTAGE - The assembly comprises polyimide film, which has thermal and dimensional stability over a broad temperature range, even in the presence of tension or other dimensional stress. The assembly has improved performance, where the assembly can be manufactured by an economical process such as a reel-to-reel process; enables monolithic integration of the thin film photovoltaic cells by the manufacture of the assembly by reel-to-reel or similar manufacturing processes; and can tolerates sufficiently high temperatures during fabrication of the assembly to maximize the photovoltaic efficiency of the photovoltaic cell.    DETAILED DESCRIPTION - An assembly comprises a polyimide film having aromatic polyimide (40-95 wt.%) is derived from at least one aromatic dianhydhde (85 mole%) and at least one aromatic diamine (85 mole%), where aromatic dianhydride and aromatic diamine being a rigid rod type dianhydride and rigid rod type diamine, and a filler having dimension of less than 800 nanometers, an aspect ratio greater than 3:1, has less than the thickness of the film in all dimensions; and is present in 5-60 wt.% of the total weight of the film, the film having a thickness 8-150 microns; an absorber layer (14); and an electrode supported by polyimide film, where electrode is between the absorber layer and the polyimide film, and electrode is in electrical communication with the absorber layer.    DESCRIPTION OF DRAWING(S) - The figure shows sectional view of thin-film solar cell fabricated on polyamide film.    Thin-film solar cell (10)    Polyamide film substrate (12)    Absorber layer (14)    Transparent conducting oxide layer (23)    Grid contact (24)