US 12,442,084 B2
Metal-clad polymer films and electronic devices
Husnu Alp Alidedeoglu, New Albany, OH (US); Patricia Gumbley, Marlborough, MA (US); Cecilia Hall, Marlborough, MA (US); Joseph Casey Johnson, Pickerington, OH (US); Benjamin Naab, Marlborough, MA (US); Jaclyn Murphy, Marlborough, MA (US); Grzegorz Slawinski, Fairborn, OH (US); Christopher Dennis Simone, Pickerington, OH (US); and Catherine R Mulzer, Marlborough, MA (US)
Assigned to DUPONT ELECTRONICS, INC., , DE (US); and ROHM AND HAAS ELECTRONIC MATERIALS LLC
Filed by DUPONT ELECTRONICS, INC., Wilmington, DE (US); and ROHM AND HAAS ELECTRONIC MATERIALS LLC, Marlborough, MA (US)
Filed on Apr. 3, 2020, as Appl. No. 16/840,280.
Prior Publication US 2021/0310126 A1, Oct. 7, 2021
Int. Cl. B32B 27/28 (2006.01); C08G 73/10 (2006.01); C23C 18/16 (2006.01); C23C 18/38 (2006.01); C25D 3/38 (2006.01); C25D 5/56 (2006.01); H05K 9/00 (2006.01)
CPC C23C 18/1653 (2013.01) [B32B 27/281 (2013.01); C08G 73/1067 (2013.01); C23C 18/1641 (2013.01); C23C 18/38 (2013.01); C25D 3/38 (2013.01); C25D 5/56 (2013.01); H05K 9/0081 (2013.01); B32B 2255/205 (2013.01); Y10T 428/24 (2015.01); Y10T 428/2495 (2015.01)] 14 Claims
 
1. A metal-clad polymer film comprising a polymer film adhered to a first metal layer, wherein:
the polymer film comprises a first thermoplastic polyimide layer, wherein the first thermoplastic polyimide layer is derived from at least three monomers comprising:
a first dianhydride having ether functionality;
70 to 99.9 mol % of a first diamine selected from 1,3-bis(4-aminophenoxy)benzene and 1,3-bis(3-aminophenoxy)benzene; and
0.1 to 30 mol % of a second diamine having hydrogen bonding;
the root-mean-square roughness (Sq) of the interface between the polymer film and the first metal layer is less than 0.1 μm;
the peel strength between the polymer film and the first metal layer is greater than 5 N/cm after 168 hours of aging at 150° C. when tested for a polymer film having a thickness in the range of from 25 to 75 μm and a first metal layer having a thickness of 18 μm in accordance with IPC-TM-650 test methods; and
the thickness of the first metal layer is 12 μm or less.
 
14. A metal-clad polymer film comprising a polymer film adhered to a first metal layer, wherein:
the polymer film comprises a first thermoplastic polyimide layer, wherein the first thermoplastic polyimide layer is derived from at least three monomers comprising:
a first dianhydride having ether functionality;
70 to 99.9 mol % of a first diamine selected from 1,3-bis(4-aminophenoxy)benzene and 1,3-bis(3-aminophenoxy)benzene; and
0.1 to 30 mol % of a second diamine having hydrogen bonding;
the root-mean-square roughness (Sq) of the interface between the polymer film and the first metal layer is less than 1 μm;
the peel strength between the polymer film and the first metal layer is greater than 5 N/cm after 168 hours of aging at 150° C. when tested for a polymer film having a thickness in the range of from 25 to 75 μm and a first metal layer having a thickness of 18 μm in accordance with IPC-TM-650 test methods;
the thickness of the first metal layer is 12 μm or less; and
the surface of the polymer film adhered to the first metal layer is not surface treated.