Polyimide film excellent in alkali etching processability...

Details Polyimide film excellent in alkali etching processability... Polyimide film excellent in alkali etching processability...

2006-09-26

2006-09-26

Gorr, Rachel (Department: 1711)

Synthetic resins or natural rubbers -- part of the class 520 ser

Synthetic resins

From carboxylic acid or derivative thereof

C216S013000, C156S230000

Reexamination Certificate

active

07112648

ABSTRACT:
A polyimide film according to the present invention satisfies Condition (1) in which a tear propagation resistance variation CHis not more than 1.0 g, and/or Condition (2) in which a swelling coefficient CRafter being dipped in an alkaline solution is not more than 20.0. By satisfying these conditions, workability of the polyimide film can be improved and working defects can be effectively prevented, thereby improving productivity of each step.

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