CPC H05K 1/036 (2013.01) [B32B 15/08 (2013.01); B32B 27/281 (2013.01); H05K 1/0393 (2013.01); C08J 2479/08 (2013.01); C08L 79/08 (2013.01); H05K 2201/0154 (2013.01); Y10T 428/31681 (2015.04); Y10T 428/31721 (2015.04)] | 16 Claims |
1. A polymer film comprising a polyimide, wherein the polyimide comprises:
two or more dianhydrides comprising:
30 to 49 mol % of a first monomer that is a crankshaft monomer; and
1 to 20 mol % of a second monomer that is a rigid non-rotational monomer; and
three or more diamines comprising:
5 to 35 mol % of a third monomer that is a rotational inhibitor monomer;
1 to 20 mol % of a fourth monomer that is a flexible monomer; and
1 to 40 mol % of a fifth monomer that is a rigid rotational monomer or a rigid non-rotational monomer, wherein the mol % of each monomer is based on the total of all five monomers, wherein 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.
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