Polyimide film

Abstract

A polyimide film comprising a substrate layer containing polyimide resin and an easy-bond layer comprising a silane coupling agent and a surfactant disposed on at least one side of the substrate layer, wherein two polyimide films are bonded to the adhesive layer for testing in a manner in which the easy-bond layer contacts the adhesive layer for testing, and the peel strength retention rate after PCT treatment (121°C, 2 atm, 100% RH, 96 hours) is 40% or more. Peel strength retention rate (%) = peel strength after PCT / initial peel strength × 100. Initial peel strength: the value measured after the two polyimide films are bonded to the adhesive layer for testing.