Polymer films and electronic devices

Abstract

In a first aspect, a polymer film includes a polyimide, wherein the polyimide includes two or more dianhydrides, including 15 to 35 mol % of a first monomer that is a crankshaft monomer and 15 to 35 mol % of a second monomer that is a flexible monomer, and two or more diamines, including 1 to 35 mol % of a third monomer that is a rotational inhibitor monomer and 15 to 49 mol % a fourth monomer that is a rigid rotational monomer, wherein the mol % of each monomer is based on the total of all four monomers. The polymer film has a dielectric dissipation loss factor, Df, of 0.005 or less, a water absorption of 2.0% or less and a water vapor transport rate of 50 (g×mil)/(m2×day) or less.

Dependencies are inferred from the claim text.