Patent ID: 11873372
Assignee: SK MICROWORKS CO., LTD.
Field: Macromolecular chemistry, polymers (Chemistry)
Classification: CPC C | IPC C

Claim 0:
1. A polyamide-imide film, which comprises a polyamide-imide polymer and has an MOR value defined in the following Equation 1a of 75% or more:

MOR(%)=(MO2a/MO1a)×100  [Equation 1a]

wherein MO1a refers to the modulus of the film at room temperature, and MO2a refers to the modulus of the film at 60° C.,
wherein the polyamide-imide polymer comprises an imide repeat unit and an amide repeat unit, and the molar ratio of the imide repeat unit to the amide repeat unit is 3:97 to 15:85,
wherein the imide repeat unit is derived from the polymerization of a diamine compound and a dianhydride compound, and
wherein the dianhydride compound comprises 2,2′-bis-(3,4-dicarboxyphenyl) hexafluoropropane dianhydride (6FDA), and the diamine compound comprises 2,2′-bis(trifluoromethyl)-4,4′-diaminobiphenyl (TFMB).