Patent ID: 11945912
Assignee: PI ADVANCED MATERIALS CO., LTD.
Field: Macromolecular chemistry, polymers (Chemistry)
Classification: CPC C | IPC C

Claim 10:
11. A polyimide film comprising second unit polymers in which an amic acid group of each of first unit polymers is converted into an imide group by catalyzing polyamic acid comprising the first unit polymers that are omnidirectionally distributed in a state of satisfying a processing condition (a) below, at least a portion of the second unit polymers being omnidirectionally distributed:

540 μm<C2*T<610 μm  (a)

wherein C is a sum of a molar amount of the imidization accelerator that is added and a molar amount of the dehydration agent that is added relative to 1 mol of an amic acid group of the polyamic acid, and T is a thickness of the polyimide film and is 30 μm or more to 75 μm or less,
wherein the molar amount of the imidization accelerator that is added is 0.43 to 0.6 relative to 1 mol of the amic acid group of the polyamic acid, and the molar amount of the dehydration agent that is added is 2.50 to 3 relative to 1 mol of the amic acid group of the polyamic acid.