| abstract |
In a first aspect, a multilayer film comprises a first outer layer comprising a first thermoplastic polyimide, a core layer comprising a polyimide, and a second outer layer comprising a second thermoplastic polyimide. The polyimide of the core layer comprises a first aromatic dianhydride comprising 3,3 ', 4,4'-biphenyltetracarboxylic dianhydride and a first aromatic diamine comprising p-phenylenediamine. The multilayer film has a total thickness in a range of 5 to 150 μm. A thickness of the core layer is in a range of 35 to 73% of the total thickness of the multilayer film. A minimum peel strength for at least one of the first and second outer layers, when bonded to a copper foil and tested according to the ASTM method of IPC-TM-650, Method No. 2.4.9B, is superior at 0.9 kgf / cm (0.88 N / mm). In a second aspect, a metal clad laminate comprises the multilayer film of the first aspect and a first metal layer adhered to an outer surface of the first outer layer of the multilayer film. |