Aromatic Polyimides With Low Dielectric Constants

Linear aromatic polyimides developed containing dimethylsilane linkages in dianhydride portions of molecules and at least one trifluoromethyl group in each of diamine portions. Polyimides offer advantages of thermal stability, low density, resistance to ionizing radiation, toughness, flexibility, and exhibit lower dielectric constants. Also polyimides nearly transparent and colorless; an advantage in protective coating of solar photovoltaic cells, optical components, and antennas.