US 11,700,687 B2
Polymer films and electronic devices
Joseph Casey Johnson, Pickerington, OH (US); Delanie J Losey, Lancaster, OH (US); Peggy Scott, Circleville, OH (US); and Christopher Dennis Simone, Pickerington, OH (US)
Assigned to DUPONT ELECTRONICS, INC., Wilmington, DE (US)
Filed by DUPONT ELECTRONICS, INC., Wilmington, DE (US)
Filed on Jun. 11, 2020, as Appl. No. 16/899,504.
Claims priority of provisional application 62/861,581, filed on Jun. 14, 2019.
Prior Publication US 2020/0396833 A1, Dec. 17, 2020
Int. Cl. H05K 1/03 (2006.01); B32B 15/08 (2006.01); B32B 27/28 (2006.01); C08L 79/08 (2006.01)
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.