Patent ID: 11905431
Assignee: PI ADVANCED MATERIALS CO., LTD.
Field: Macromolecular chemistry, polymers (Chemistry)
Classification: CPC C  H | IPC C  H

Claim 1:
2. The polyimide varnish according to claim 1,
wherein the aromatic carboxylic acid comprises one or more selected from the group consisting of pyromellitic acid (PMA), 3,3′,4,4′-biphenyltetracarboxylic acid (BPTA), 1,2,3,4-benzenetetracarboxylic acid, benzophenone-3,3′,4,4′-tetracarboxylic acid, pyrazinetetracarboxylic acid, 2,3,6,7-naphthalenetetracarboxylic acid and naphthalene-1,4,5,8-tetracarboxylic acid.